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-1- a a v v 6 6 0 0 c c h h a a l l f f - - b b r r i i c c k k s s e e r r i i e e s s t t e e c c h h n n i i c c a a l l r r e e f f e e r r e e n n c c e e n n o o t t e e s s 48v input, 12v output 48v input, 12v output 50-150w dc-dc converter 50-150w dc-dc converter (rev01) usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 publishing date: 20020607
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -2- introduction introduction the av60c half-brick series of switching dc- dc converters is one of the most cost effective options available in component power. the av60c half-brick uses an industry standard package size of 2.4?x2.28?x0.5? and pinout configuration, provides standard control, trim, and sense functions, also features high power density up to 54.8w/in 3 which gives more selectivity to meet small size requirement. av60c half-brick series comes in 48v input ver- sion with a 2:1 ( 36-75v ) input range. this series has input lvp, output ovp, ocp, short circuit protection and over temperature protec- tion. there are isolated single output 3.3v, 5v, 12v, 15v, and the isolation voltage is 1500vdc. this series is designed to meet cispr22, fcc class a, ul and csa certifications. the design features of the av60c half-brick series set a new standard for high density power converters. the unit employs an alu- minum baseplate to carry all of the power com- ponents, and conduct the dissipated heat to the ambient. a conventional, multi-layer printed cir- cuit board, over the top of the power substrate, contains all of the small signal control circuitry, all constructed with automated smd technolo- gy. design feature design feature high efficiency high power density low output noise metal baseplate cnt function remote sense trim function input under-voltage lockout output short circuit protection output current limiting output over-voltage protection overtemperature protection high input-output isolation voltage options options heat sink available for extended operation. choice of cnt control logic configuration.
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -3- fuse* tr i m -vout -sense +vout +sense -vin cnt +vin load c4 c2 case vin c1 c3 fuse*: use external fuse ( fast blow type ) for each unit. 50w output : 5a fuse 75w output : 7.5a fuse 100w output : 10a fuse 150w output : 20a fuse c1: recommended input capacitor c1 -20c ~ +100c: m 47f/100v electrolytic or ceramic type capacitor. -40c ~ +100c: m 47f/100v ceramic type capacitor only. c2: recommended output capacitor c2 -20c~ +100c: 1000f/25v (electrolytic capacitor) for 50w-75w 2200f/25v (electrolytic capacitor) for 100w-150w -40c~ +100c: for this temperature range, use two pieces of the recommended capacitor above. c3: recommended 4700pf/2000v c4: recommended 0.1f/25v t t ypical application ypical application
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com block diagram block diagram ordering information ordering information av60c-048l-120f04 36-75v 12v 4.2a 80 250 86% 88% AV60C-048L-120F04N 36-75v 12v 4.2a 80 250 86% 88% av60c-048l-120f06 36-75v 12v 6.3a 80 250 86% 88% av60c-048l-120f06n 36-75v 12v 6.3a 80 250 86% 88% av60c-048l-120f08 36-75v 12v 8.3a 80 250 86% 88% av60c-048l-120f08n 36-75v 12v 8.3a 80 250 86% 88% av60c-048l-120f12 36-75v 12v 12.5a 80 250 86% 88% av60c-048l-120f12n 36-75v 12v 12.5a 80 250 86% 88% -4- +vout -vout +sense -sense cnt +vin -vin trim model input output output ripple noise efficiency number voltage voltage current (mv rms) (mv pp) min. typ.
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -5- absolute maximum rating input voltage(continuous) -0.3 80 vdc input voltage(peak/surge) -0.3 100 vdc 100ms non-repetitive case temperature -40 100 c storage temperature -55 125 c input characteristics input voltage range 36 48 75 vdc input reflected current 30 50 map-p turn-off input voltage 30 33 35 v turn-on input voltage 31 34 36 v turn on time 10 35 ms cnt function logic high 3 15 vdc logic low 1.2 vdc control current 2 ma general specifications mtbf 2,000 k hrs bellcore tr332, t c=40c isolation 1500 vdc pin solder temperature 260 c wave solder < 10 s hand soldering time 5 s iron temperature 425c weight 75 grams characteristic min typ. max units notes characteristic min typ. max units notes characteristic min typ. max units notes characteristic min typ. max units notes
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com av60c-048l-120f04(n) output characteristics power 50 w output current 0.42 4.2 a output setpoint voltage 11.88 12 12.12 vdc vin=48v, io=4.2a line regulation 0.02 0.2 %vo vin=36~75v, io=4.2a load regulation 0.1 0.5 %vo io=0~4.2a, vin=48v dynamic response 50-75% load 1 %vo ta=25c, di/dt=1a/10s 200 s ta=25c, di/dt=1a/10s 50-25% load 1 %vo ta=25c, di/dt=1a/10s 200 s ta=25c, di/dt=1a/10s current limit threshold 4.62 5.46 5.88 a short circuit current 6.97 a efficiency 86 88 % vin=48v, io=4.2a input current 1.7 a vinmin=36v trim range 90 110 %vo over voltage protection setpoint 13.2 16 v sense compensation 0.5 v 0.25v each leg temperature regulation 0.02 %v o/c ripple (rms) 80 mv ( 0 to 20mhz bandwidth ) noise (p-p) 250 mv ( 0 to 20mhz bandwidth ) over temperature protection 105 c switching frequency 280 khz maximum capacitor load 10,000 f -6- characteristic min typ. max units notes
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -7- av60c-048l-120f06(n) output characteristics power 75 w output current 0.63 6.3 a output setpoint voltage 11.88 12 12.12 vdc vin=48v, io=6.3a line regulation 0.02 0.2 %vo vin=36~75v, io=6.3a load regulation 0.1 0.5 %vo io=0~6.3a, vin=48v dynamic response 50-75% load 1 %vo ta=25c, di/dt=1a/10s 200 s ta=25c, di/dt=1a/10s 50-25% load 1 %vo ta=25c, di/dt=1a/10s 200 s ta=25c, di/dt=1a/10s current limit threshold 6.93 8.19 8.82 a short circuit current 10.7 a efficiency 86 88 % vin=48v, io=6.3a input current 2.5 a vinmin=36v trim range 90 110 %vo over voltage protection setpoint 13.2 16 v sense compensation 0.5 v 0.25v each leg temperature regulation 0.02 %v o/c ripple (rms) 80 mv ( 0 to 20mhz bandwidth ) noise (p-p) 250 mv ( 0 to 20mhz bandwidth ) over temperature protection 105 c switching frequency 280 khz maximum capacitor load 10000 f characteristic min typ. max units notes
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com av60c-048l-120f08(n) output characteristics power 100 w output current 0.83 8.3 a output setpoint voltage 11.88 12 12.12 vdc vin=48v, io=8.3a line regulation 0.02 0.2 %vo vin=36~75v, io=8.3a load regulation 0.1 0.5 %vo io=0~8.3a, vin=48v dynamic response 50-75% load 1 %vo ta=25c, di/dt=1a/10s 150 s ta=25c, di/dt=1a/10s 50-25% load 1 %vo ta=25c, di/dt=1a/10s 150 s ta=25c, di/dt=1a/10s current limit threshold 9.13 10.79 11.62 a short circuit current 14.1 a efficiency 86 88 % vin=48v, io=8.3a input current 3.4 a vinmin=36v trim range 90 110 %vo over voltage protection setpoint 13.2 16 v sense compensation 0.5 v 0.25v each leg temperature regulation 0.02 %v o/c ripple (rms) 80 mv ( 0 to 20mhz bandwidth ) noise (pp) 250 mv ( 0 to 20mhz bandwidth ) over temperature protection 105 c switching frequency 280 khz maximum capacitor load 10000 f -8- characteristic min typ. max units notes
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -9- av60c-048l-120f12(n) output characteristics power 150 w output current 1.25 12.5 a output setpoint voltage 11.88 12 12.12 vdc vin=48v, io=12.5a line regulation 0.02 0.2 %vo vin=36~75v, io=12.5a load regulation 0.1 0.5 %vo io=0~12.5a, vin=48v dynamic response 50-75% load 1 %vo ta=25c, di/dt=1a/10s 150 s ta=25c, di/dt=1a/10s 50-25% load 1 %vo ta=25c, di/dt=1a/10s 150 s ta=25c, di/dt=1a/10s current limit threshold 13.75 16.25 17.5 a short circuit current 21.3 a efficiency 86 88 % vin=48v, io=12.5 a input current 5.1 a vinmin=36v trim range 90 110 %vo over voltage protection setpoint 13.2 16 v sense compensation 0.5 v 0.25v each leg temperature regulation 0.02 %v o/c ripple (rms) 80 mv ( 0 to 20mhz bandwidth ) noise (pp) 250 mv ( 0 to 20mhz bandwidth ) over temperature protection 105 c switching frequency 280 khz maximum capacitor load 10000 f characteristic min typ. max units notes
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -10- ef ef ficiency characteristic curves ficiency characteristic curves (at 25 c) (at 25 c) output current (amps) efficiency (%) 60 65 70 75 80 85 90 02468101214 vin=36v vin=48v vin=75v output current (amps) efficiency (%) 60 65 70 75 80 85 90 0246810 vin=36v vin=48v vin=75v output current (amps) efficiency (%) 60 65 70 75 80 85 90 0 123456 vin=75v vin=48v vin=36v 7 typical efficiency AV60C-048L-120F04N typical efficiency av60c-048l-120f08n typical efficiency av60c-048l-120f06n typical efficiency av60c-048l-120f12n 60 65 70 75 80 85 90 012345 output current (amps) efficiency (%) vin=36v vin=48v vin=75v
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -11- overcurrent protection (ocp) overcurrent protection (ocp) (at 25 c) (at 25 c) 0 3 6 9 12 15 0246810 output voltage (volts) output curent (amps) vin=36v vin=48v vin=75v 0 3 6 9 12 15 03691215 output voltage (volts) output curent (amps) vin=36v vin=48v vin=75v 0 3 6 9 12 15 0 5 10 15 output voltage (volts) output curent (amps) vin=36v vin=48v vin=75v 0 3 6 9 12 15 0 5 10 15 20 output voltage (volts) output curent (amps) vin=36v vin=48v vin=75v typical output overcurrent performance AV60C-048L-120F04N typical output overcurrent performance av60c-048l-120f08n typical output overcurrent performance av60c-048l-120f06n typical output overcurrent performance av60c-048l-120f12n
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com characteristic curves characteristic curves (at 25 c) (at 25 c) -12- typical input current characteristics AV60C-048L-120F04N input voltage (volts) input current (amps) 0 0.5 1 1.5 2 020406080 typical input current characteristics av60c-048l-120f06n input voltage (volts) input current (amps) 0 0.6 1.2 1.8 2.4 3 020406080 input voltage (volts) input current (amps) 0 0.8 1.6 2.4 3.2 4 0 20406080 input voltage (volts) input current (amps) 0 1.5 3 4.5 6 020406080 typical input current characteristics av60c-048l-120f08n typical input current characteristics av60c-048l-120f12n
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -13- t t ransient response ransient response (rated input voltage, step load, at 25 c) (rated input voltage, step load, at 25 c) typical transient response to step load change from 25%-50%-25% iomax AV60C-048L-120F04N typical transient response to step load change from 25%-50%-25% iomax av60c-048l-120f06n typical transient response to step load change from 25%-50%-25% iomax av60c-048l-120f08n typical transient response to step load change from 25%-50%-25% iomax av60c-048l-120f12n
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com t t ransient response ransient response (rated input voltage, step load, at 25 c) (rated input voltage, step load, at 25 c) -14- typical transient response to step load change from 50%-75%-50% iomax AV60C-048L-120F04N typical transient response to step load change from 50%-75%-50% iomax av60c-048l-120f06n typical transient response to step load change from 50%-75%-50% iomax av60c-048l-120f08n typical transient response to step load change from 50%-75%-50% iomax av60c-048l-120f12n
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com characteristic curves characteristic curves (rated input voltage, full load, at 25 c) (rated input voltage, full load, at 25 c) -15- typical start-up from power on AV60C-048L-120F04N typical start-up from power on av60c-048l-120f06n typical start-up from power on av60c-048l-120f08n typical start-up from power on av60c-048l-120f12n
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com characteristic curves characteristic curves (rated input voltage, full load, at 25 c) (rated input voltage, full load, at 25 c) -16- typical shut-down from power off AV60C-048L-120F04N typical shut-down from power off av60c-048l-120f06n typical shut-down from power off av60c-048l-120f08n typical shut-down from power off av60c-048l-120f12n
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com characteristic curves characteristic curves (rated input voltage, full load, at 25 c) (rated input voltage, full load, at 25 c) -17- typical start-up from cnt control AV60C-048L-120F04N typical start-up from cnt control av60c-048l-120f06n typical start-up from cnt control av60c-048l-120f08n typical start-up from cnt control av60c-048l-120f12n
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com characteristic curves characteristic curves (rated input voltage, full load, at 25 c) (rated input voltage, full load, at 25 c) -18- typical shut-down from cnt control AV60C-048L-120F04N typical shut-down from cnt control av60c-048l-120f06n typical shut-down from cnt control av60c-048l-120f08n typical shut-down from cnt control av60c-048l-120f12n
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com characteristic curves characteristic curves (rated input voltage, full load, at 25 c) (rated input voltage, full load, at 25 c) -19- typical output ripple voltage AV60C-048L-120F04N typical output ripple voltage av60c-048l-120f06n typical output ripple voltage av60c-048l-120f08n typical output ripple voltage av60c-048l-120f12n
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com characteristic curves characteristic curves (rated input voltage, full load, at 25 c) (rated input voltage, full load, at 25 c) -20- overvoltage protection AV60C-048L-120F04N overvoltage protection av60c-048l-120f06n overvoltage protection av60c-048l-120f08n overvoltage protection av60c-048l-120f12n
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com characteristic curves characteristic curves (rated input voltage, full load, (rated input voltage, full load, ci=100uf ci=100uf , at 25 c) , at 25 c) -21- input reflected current AV60C-048L-120F04N input reflected current av60c-048l-120f06n input reflected current av60c-048l-120f08n input reflected current av60c-048l-120f12n
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -22- pins pins the +vin and -vin input connection pins are located as shown in figure 1. av60c half-brick series have a 2:1 input voltage range and 48 vin converters can accept 36-75 vdc. care should be taken to avoid applying reverse polarity to the input which can damage the con- verter. input characteristic input characteristic fusing fusing the av60c half-brick power modules have no internal fuse. an external fuse must always be employed! to meet international safety requirements, a 250 volt rated fuse should be used. if one of the input lines is con- nected to chassis ground, then the fuse must be placed in the other input line. standard safety agency regulations require input fusing. recommended fuse ratings for the av60c series is shown in the table following. input reverse v input reverse v oltage protection oltage protection under installation and cabling conditions where reverse polarity across the input may occur, reverse polarity protection is recommended. protection can easily be provided as shown in figure 2. in both cases the diode rating is deter- mined by the power of the converter. diodes should be rated as table1 is shown. placing the diode across the inputs rather than in-line with the input offers an advan- tage in that the diode only conducts in a reverse polarity condition, which increases circuit efficiency and thermal performance. input undervoltage protection input undervoltage protection the av60c half-brick series is protected against undervoltage on the input. if the input voltage drops below the acceptable range, the converter will shut down. it will automatically restart when the undervoltage condition is removed. input filter input filter input filters are included in the converters to help achieve standard system emissions certifi- cations. some users however, may find that additional input filtering is necessary. the av60c half-brick 12v output series has an internal switching frequency of 280 khz so a high frequency capacitor mounted close to the input terminals produces the best results. to reduce reflected noise, a capacitor can be added across the input as shown in figure 3, forming a filter. a 47 f/100v electrolytic -vin case cnt -vout -sense trim +sense +vout +vin component-side footprint fig.1 pin location +vin -vin +vin -vin fig.2 reverse polarity protection circuits series fuse rating(48vin) 50w 5a 75w 7.5a 100w 10a 150w 20a
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -23- capacitor is recommended for c1. for conditions where emi is a concern, a differ- ent input filter can be used. figure 4 shows an input filter designed to reduce emi effects. c 1 is a 47 f/100v electrolytic capacitor, and c 2 is a 1 f/100v metal film or ceramic high frequency capacitor, c y1 and c y2 are each 1000pf/1500vdc high frequency ceramic capacitors, and l1 is a 1mh common mode choke. when a filter inductor is connected in series with the power converter input, an input capac- itor c 1 should be added. an input capacitor c 1 should also be used when the input wiring is long, since the wiring can act as an inductor. failure to use an input capacitor under these conditions can produce large input voltage spikes and an unstable output. cnt function cnt function two cnt logic options are available. negative logic: applying a voltage less than 1.2v to the cnt pin will enable the output, and applying a voltage greater than 3v will disable it. positive logic: applying a voltage larger than 3v to the cnt pin will enable the output, and applying a voltage less than 1.2v will disable it. negative logic, device code suf fix ? n ? . positive logic, device code suffix nothing is the factory-preferred. if the cnt pin is left open, the converter will default to ? control off ? operation in nega- tive logic, but default to ? control on ? in positive logic. the maximum voltage that can be applied to the cnt pin is 15v. figure 5 to figure 8 are the four kinds of cnt circuits. input-output characteristic input-output characteristic safety consideration safety consideration for safety-agency approval of the system in which the power module is used, the power module must be installed in compliance with the spacing and separation requirements of the +vin -vin c1 fig.3 ripple rejection input filter +v in -v in c 1 c 2 c y1 c y2 l 1 fig.4 emi reduction input filter -v in cnt -v in cnt -v in cnt -v in cnt fig.8 relay control fig.5 simple control fig.6 transistor control fig.7 isolated control
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -24- end-use safety agency standard, i.e., ul1950, csa c22.2 no. 950-95, and en60950. the input-to-output 1500vdc isolation is an opera- tional insulation. the dc/dc power module should be installed in end-use equipment, in compliance with the requirements of the ulti- mate application, and is intended to be supplied by an isolated secondary circuit. when the sup- ply to the dc/dc power module meets all the requirements for selv(<60vdc), the output is considered to remain within selv limits (level 3). if connected to a 60vdc power system, dou- ble or reinforced insulation must be provided in the power supply that isolates the input from any hazardous voltages, including the ac mains. one vin pin and one vout pin are to be grounded or both the input and output pins are to be kept floating. single fault testing in the power supply must be performed in combina- tion with the dc/dc power module to demon- strate that the output meets the requirement for selv. the input pins of the module are not operator accessible. note : do not ground either of the input pins of the module, without grounding one of the output pins. this may allow a non-selv voltage to appear between the output pin and ground. case grounding case grounding for proper operation of the module, the case or baseplate of the av60c half-brick module does not require a connection to a chassis ground. if the module is not in a metallic enclosure in a system, it may be advisable to directly ground the case to reduce electric field emissions. leaving the case floating can help to reduce magnetic field radiation from common mode noise currents. if the case has to be grounded for safety or other reasons, an inductor can be connected to chassis at dc and ac line fre- quencies, but be left floating at switching fre- quencies. under this condition, the safety requirements are met and the emissions are minimized. output characteristics output characteristics minimum load requirement minimum load requirement the av60c half-brick series modules will main- tain regulation and operate properly with a no load condition. however, the transient response is altered below a minimum output load condition. when the module is operating below the minimum load, the transient ampli- tude and recovery time are both increased when the load is stepped higher, the output rip- ple continues to meet the peak to peak require- ments. for the av60c half-brick modules, the 10% minimum load requirement is strictly in order to meet all performance specifications. remote sensing remote sensing the av60c half-brick converters can remotely sense both lines of its output which moves the effective output voltage regulation point from the output of the unit to the point of connection of the remote sense pins. this feature automat- ically adjusts the real output voltage of the av60c half-brick series in order to compensate for voltage drops in distribution and maintain a regulated voltage at the point of load. when the converter is supporting loads far away, or is used with undersized cabling, sig- nificant voltage drop can occur at the load. the best defense against such drops is to locate the load close to the converter and to ensure ade- quately sized cabling is used. when this is not possible, the converter can compensate for a drop of up to 0.25v per lead, or a total of 0.5v, through use of the sense leads. when used, the + and - sense leads should be connected from the converter to the point of
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -25- load as shown in figure 9 using twisted pair wire. the converter will then regulate its output voltage at the point where the leads are con- nected. care should be taken not to reverse the sense leads. if reversed, the converter will trig- ger ovp protection and turn off. when not used, the +sense lead must be connected with +vo, and -sense with -vo. also note that the output voltage and the remote sense volt- age offset must be less than the minimum over- voltage trip point. note that at elevated output voltages the maximum power rating of the module remains the same, and the output current capability will decrease correspond- ingly. output t output t rimming rimming users can increase or decrease the output volt- age set point of a module by connecting an external resistor between the trim pin and either the sense (+ ) or sense ( - ) pins. the trim resistor should be positioned close to the module. if not using the trim feature, leave the trim pin open. trimming up by more than 10% of the nominal output may damage the converter. trimming down more than 10% can cause the converter to regulate improperly. trim down and trim up circuits and the corresponding configuration are shown in figure 10 and figure 11. +v out -v out load +sense -sense twisted pair +s -s fig.9 sense connections % change in output voltage (y) adjustment resistor value (k ? ) 0 100 200 300 400 500 600 700 800 900 012345678910 vo(100+y) r adj-up = (100+2y) 1.26y y - +vin -vin cnt case +vout -vout sense(+) trim sense(?) r adj-up r load where y is the adjusting percentage of the voltage. 0 < y < 10 radj-up is in k ? . fig.10 trim up circuit and curves r adj-down = where y is the adjusting percentage of the voltage. 0 < y < 10 radj-down is in k ? . r adj-down r load 100 y - 2 +vin -vin cnt case +vout -vout sense(+) trim sense( ? ) % change in output voltage (y) adjustment resistor value (k ? ) 0 10 20 30 40 50 60 70 80 90 100 01 23 456 78 910 fig.11 trimming down circuit and curves
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -26- output over-v output over-v oltage protection oltage protection the over-voltage protection has a separate feedback loop which activates when the output voltage is between 13.2v-16v. when an over- voltage condition occurs, a ? turn off ? signal was sent to the input of the module, and shut off the output. the module will restart after power on again. output over-current protection output over-current protection av60c half-brick dc/dc converters feature foldback current limiting as part of their overcurrent protection (ocp) circuits. when output current exceeds 110% to 140% of rated current, such as during a short circuit condition, the output will shutdown immediately, and can tolerate short circuit conditions indefinitely. when the overcurrent condition is removed, the converter will automatically restart. output filters output filters when the load is sensitive to ripple and noise, an output filter can be added to minimize the effects. a simple output filter to reduce output ripple and noise can be made by connecting a capacitor across the output as shown in figure 12. the recommended value for the output capacitor c 1 is1000 f/25v. extra care should be taken when long leads or traces are used to provide power to the load. long lead lengths increase the chance for noise to appear on the lines. under these con- ditions c2 can be added across the load as shown in figure 13. the recommended compo- nent for c2 is 1000 f/25v capacitor and con- necting a 0.1 f ceramic capacitor c1 in parallel. decoupling decoupling noise on the power distribution system is not always created by the converter. high speed analog or digital loads with dynamic power demands can cause noise to cross the power inductor back onto the input lines. noise can be reduced by decoupling the load. in most cases, connecting a 10 f tantalum capacitor in paral- lel with a 0.1 f ceramic capacitor across the load will decouple it. the capacitors should be connected as close to the load as possible. ground loops ground loops ground loops occur when different circuits are given multiple paths to common or earth ground, as shown in figure 14.multiple ground points can slightly different potential and cause current flow through the circuit from one point to another. this can result in additional noise in all the circuits. to eliminate the problem, circuits should be designed with a single ground con- nection as shown in figure 15. +v out -v out load c 1 c 2 fig.13 output ripple filter for a distant load +v out -v out load c 1 fig.12 output ripple filter +vout -vout load load r line r line r line r line r line r line ground loop fig.14 ground loops fig.15 single point ground +vout -vout load load r line r line r line r line r line
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -27- parallel power distribution parallel power distribution figure 16 shows a typical parallel power distri- bution design. such designs, sometimes called daisy chains, can be used for very low output currents, but are not normally recommended. the voltage across loads far from the source can vary greatly depending on the ir drops along the leads and changes in the loads clos- er to the source. dynamic load conditions increase the potential problems. radial power distribution radial power distribution radial power distribution is the preferred method of providing power to the load. figure 17 shows how individual loads are connected directly to the power source. this arrangement requires additional power leads, but it avoids the voltage variation problems associated with the parallel power distribution technique. mixed distribution mixed distribution in the real world a combination of parallel and radial power distribution is often used. dynamic and high current loads are connected using a radial design, while static and low current loads can be connected in parallel. this combined approach minimizes the drawbacks of a parallel design when a purely radial design is not feasi- ble. redundant operation redundant operation a common requirement in high reliability sys- tems is to provide redundant power supplies. the easiest way to do this is to place two con- verters in parallel, providing fault tolerance but not load sharing. oring diodes should be used to ensure that failure of one converter will not cause failure of the second. figure 19 shows such an arrangement. upon application of power, one of the converters will provide a slightly higher output voltage and will support the full load demand. the second converter will see a zero load condition and will ?idle?. if the first converter should fail, the second converter will support the full load. when designing redundant converter circuits, shottky diodes should be used to minimize the forward voltage drop. the voltage drop across the shottky diodes must also be considered when deter- mining load voltage requirements. load 1 load 2 load 3 +vout -vout r l1 r l2 r l3 r g1 r g2 r g3 r l = lead resistance r g = ground lead resistance fig.17 radial power distribution load 1 load 2 load 3 +vout -vout r l1 r l2 r l3 r g1 r g2 r g3 r l = lead resistance r g = ground lead resistance load 4 r l4 r g4 fig.18 mixed power distribution +v out -v out +v out -v out load fig.19 redundant operation load 1 load 2 load 3 +vout -vout r l1 r l2 r l3 r g1 r g2 r g3 i 1 + i 2 + i 3 i 2 + i 3 i 3 r l = lead resistance r g = ground lead resistance fig.16 parallel power distribution
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -28- thermal management thermal management t t echnologies echnologies av60c half-brick series 50 w to 150 w mod- ules feature high efficiency and the 12v output units have typical efficiency of 88% at full load. with less heat dissipation and temperature- resistant components such as ceramic capaci- tors, these modules exhibit good behavior dur- ing prolonged exposure to high temperatures. maintaining the operating case temperature (tc) within the specified range help keep inter- nal-component temperatures within their speci- fications which in turn help keep mtbf from falling below the specified rating. proper cool- ing of the power modules is also necessary for reliable and consistent operation. basic thermal management basic thermal management measuring the case temperature of the module (tc) as the method shown in figure 20 can ver- ify the proper cooling. figure 20 shows the metal surface of the module and the pin loca- tions. the module should work under 90c for the reliability of operation and t c must not exceed 100 c while operating in the final sys- tem configuration. the measurement can be made with a surface probe after the module has reached thermal equilibrium. if a heat sink is mounted to the case, make the measurement as close as possible to the indicated position. it makes the assumption that the final system configuration exists and can be used for a test environment. the following text and graphs show guidelines to predict the thermal performance of the mod- ule for typical configurations that include heat sinks in natural or forced airflow environments. note that tc of module must always be checked in the final system configuration to verify proper operational due to the variation in test condi- tions. thermal management acts to transfer the heat dissipated by the module to the surrounding environment. the amount of power dissipated by the module as heat (p d ) is got by the equa- tion below: p d = p i ? p o where : p i is input power; p o is output power; p d is dissipated power. also, module efficiency ( ) is defined as the fol- lowing equation: = p o / p i if eliminating the input power term, from two above equations can yield the equation below: p d = p o (1- ) / the module power dissipation then can be cal- culated through the equation. because each power module output voltage has a different power dissipation curve, a plot of power dissipation versus output current over three different line voltages is given in each module-specific data sheet. the typical power dissipation curve of av60c half-brick series 12v output are shown as fig. 21 to fig. 24. 29.0 (1.14) 30.5 (1.2) cnt case +sense trim ? sense +vin measure case temperature here base-plate side view dimensions: millimeters (inches) -vin +vout -vout fig.20 case temperature measurement
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -29- module derating module derating experiment setup experiment setup from the experimental set up shown in figure 25, the derating curves as figure 26 can be drawn. note that the pwb ( printed-wiring board ) and the module must be mounted verti- cally. the passage has a rectangular cross- section. the clearance between the facing pwb and the top of the module is kept 13 mm (0.5 in.) constantly. convection w convection w ithout heat sinks ithout heat sinks heat transfer can be enhanced by increasing the airflow over the module. figure 26 shows the maximum power that can be dissipated by the module. in the test, natural convection airflow was mea- sured at 0.05m/s to 0.1m/s (10 ft./min. to 20 ft./min.). the 0.5 m/s to 4.0 m/s (100 ft./min. to 800 ft./min.) curves are tested with externally adjustable fans. the appropriate airflow for a given operating condition can be determined through figure 26. 0 3 6 9 12 15 18 output current (amps) power dissipation (w) vin=36v vin=48v vin=75v 0246810 output current (amps) power dissipation (w) 0 2 4 6 8 10 12 14 01 2345 67 vin=36v vin=48v vin=75v output current (amps) power dissipation (w) 0 3 6 9 12 15 18 21 24 02468101214 vin=36v vin=48v vin=75v fig.22 av60c-048l-120f06n power dissipation fig.23 av60c-048l-120f08n power dissipation fig.24 av60c-048l-120f12n power dissipation dimensions: millimeters (inches). facing pwb pwb module 50.8(2.0) air velocity and ambient temperature testing point air flow 13(0.5) fig.25 experiment set up 1 3 5 7 9 11 0 0.9 1.8 2.7 3.6 4.5 output current (amps) power dissipation (w) vin=36v vin=48v vin=75v fig.21 AV60C-048L-120F04N power dissipation
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -30- example 1. how to calculate the minimum airflow required to maintain a desired tc? if a av60c-048l-120f12n module operates with a 48v line voltage, a 12.5 a output current, and a 40 c maximum ambient temperature, what is the minimum airflow necessary for the operating? determine p d ( referenced fig.24 ) with con- dition: v i = 48 v l o = 12.5 a get: p d = 21 w and with t a = 40 c determine airflow ( fig.26 ): v = 3 m/s (600 ft./min.) example 2. how to calculate the maximum output power of a module in a certain con- vection and a max. t a ? what is the maximum power output for a av60c-048l-120f12n operating at following conditions: v i = 48 v v = 2.0 m/s (600 ft./min.) t a = 40 c determine p d ( fig.26 ) p d = 16 w determine i o (fig.24): i o = 10 a calculate p o : p o = (v o ) x (i o ) = 12 x 10 =120 w although the two examples above use 100 c as the maximum case temperature, for extremely high reliability applications, one may design to a lower case temperature as shown in example 4 on page 32. heat sink configuration heat sink configuration several standard heat sinks are available for the av60c half-brick 50w to 150w modules as shown in figure 27 to figure 29. dimensions: millimeters (inches). 57.9 (2.28) 61 (2.4) wdl10040 wdl02540 wdl05040 1/4 in. 1/2 in. 1 in. fig.28 longitudinal fins heat sink dimensions: millimeters (inches). wdt10040 61 (2.4) wdt02540 wdt05040 57.9 (2.28) 1/4 in. 1/2 in. 1 in. fig.29 transverse fins heat sink 89.1(3.51) 57.0 (2.24) 11.8 (0.465) 4.9(0.193) dimensions: millimeters (inches). fig.27 non standard heatsink 0 10203040 100 0 35 ambient temperature, t a (c) power dissipation p d (w) 25 20 10 90 80 70 60 50 4.0 m/s (800 ft./min.) 1.0 m/s (200 ft./min.) 2.0 m/s (400 ft./min.) 3.0 m/s (600 ft./min.) 5 15 30 0.5 m/s (100 ft./min.) natural convection (10-20 ft./min.) fig.26 forced convection power derating without heat sink
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -31- the heat sinks mount to the top surface of the module with screws torqued to 0.56 n-m (5 in.- lb). a thermally conductive dry pad or thermal grease is placed between the case and the heat sink to minimize contact resistance (typi- cally 0.1 c/w to 0.3 c/w) and temperature dif- ferential. nomenclature for heat sink configurations is as follows: wdxyyy40 where: x = fin orientation: longitudinal (l) or trans verse (t) yyy = heat sink height (in 100ths of inch) for example, wdt5040 is a heat sink that is transverse mounted (see figure 29) for a 61 mm x 57.9 mm (2.4 in.x 2.28 in.) module with a heat sink height of 0.5 in. heatsink mounting advice heatsink mounting advice a crucial part of the thermal design strategy is the thermal interface between the baseplate of the module and the heatsink. inadequate mea- sures taken here will quickly negate any other attempts to control the baseplate temperature. for example, using a conventional dry insulator can result in a case-heatsink thermal imped- ance of >0.5 c/w, while use one of the rec- ommended interface methods (silicon grease or thermal pads available from astec) can result in a case-heatsink thermal impedance around 0.1c/w. natural convection with heat sink natural convection with heat sink the power derating for a module with the heat sinks ( shown as figure 27 to figure 29) in nat- ural convection is shown in figure 31. in this test, natural convection generates airflow about 0.05 m/s to 0.1 m/s ( 10ft./min to 20ft./min ). figure 31 can be used for heat-sink selection in natural convection environment. example 3. how to select a heat sink ? what heat sink would be appropriate for a av60c-048l-120f12n in a natural convection environment at nominal line, 3/4 load, and max- imum ambient temperature of 40c? determine p d ( referenced fig.24 ) with con- dition: v i = 48 v i o = 3/4 (12.5) = 9.4 a t a = 40 c get: p d = 16 w determine heat sink (fig.31 ): 1 in. allows up to t a = 55 c fig.30 heat sink mounting 0 10203040 90100 0 20 25 30 ambient temperature, t a (c) power dissipation p d (w) 15 10 5 50 60 70 80 1 in. heat sink 1/2 in. heat sink 1/4 in. heat sink no heat sink fig.31 heat sink power derating curves, natural convection
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -32- basic thermal model basic thermal model there is another approach to analyze module thermal performance, to model the overall ther- mal resistance of the module. this presentation method is especially useful when considering heat sinks. the following equation can be used to calculate the total thermal resistance . r ca = ? t c , max / p d where r ca is the module thermal resistance, ? t c , max is the maximum case temperature rise, p d is the module power dissipation. in this model, p d , ? t c, max , and r ca are equals to current flow, voltage drop, and electrical resistance, respectively, in ohm's law, as shown in figure 32. also, ? t c, max is defined as the difference between the module case tem- perature (t c ) and the inlet ambient temperature (t a ). ? t c , max = t c ? t a where t c is the module case temperature; t a is the inlet ambient temperature. for av60c half-brick series 50w to 150w 12v output converters, the module's thermal resis- tance values versus air velocity have been determined experimentally and shown in figure 33. the highest values on each curve repre- sents the point of natural convection. figure 33 is used for determining thermal per- formance under various conditions of airflow and heat sink configurations. example 4. how to determine the allowable minimum airflow to heat sink combinations necessary for a module under a desired tc and a certain condition? although the maximum case temperature for the av60c half-brick series is 100 c, you can improve module reliability by limiting tc,max to a lower value. how to decide? for example, what is the allowable minimum airflow for av60c-048l-120f12n heat sink combinations at desired tc of 80 c? the working condition is as following: v i = 48 v,i o = 12.5 a, t a = 40 c determine p d ( fig.24 ) p d = 21w then solve r ca : : r ca = ? t c , max / p d r ca = ( t c ? t a ) / p d r ca = ( 80 ? 40 ) / 21 = 2 c/w determine air velocity from figure 33: if no heat sink: v > 3 m/s ( 600 ft./min.) if 1/4 in. heat sink: v = 3 m/s ( 600 ft./min.) if 1/2 in. heat sink: v = 2 m/s ( 400 ft./min.) if 1 in. heat sink: v = 1.2 m/s ( 240 ft./min.) p d thermal r ca: resistance fig.32 basic thermal resistance model 0 0.5(100) 1.0(200) 1.5(300) 2.0(400) 2.5(500) 3.0(600) 0 1 5 6 7 8 air velocity m/s (ft./min.) 4 3 2 case-ambient thermal resistance r ca (c/w) 1 in. heat sink 1/2 in. heat sink 1/4 in. heat sink no heat sink fig.33 case-to-ambient thermal resistance curves; either orientation
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com -33- example 5. how to determine case tempera- ture ( tc ) for the various heat sink configu- rations at certain air velocity? what is the allowable tc for av60c-048l- 120f12n heat sink configurations at desired air velocity of 2.0 m/s, and it is operating at a 48 v line voltage, a 12.5 a output current, a 40 c maximum ambient temperature? determine p d ( fig.24 ) with condition: v i = 48 v i o = 12.5 a t a = 40 c v = 2.0 m/s (400 ft./min.) get: p d = 21 w determine t c : t c = (r ca x p d ) + t a determine the corresponding thermal resis- tances ( r ca ) from figure 33: no heat sink: r ca = 3.8 c/w t c = (3.8 x 21) + 40 =120 c 1/4 in. heat sink: r ca = 2.8 c/w t c = (2.8 x 21) + 40 = 99 c 1/2 in. heat sink: r ca = 2.0 c/w t c = (2.0 x 21) + 40 = 82 c 1 in. heat sink: r ca = 1.2 c/w t c = (1.2 x 21) + 40 = 65 c in this configuration, the heat sink would have to be at least 1/4 in. high so that the power module does not exceed the maximum case temperature of 100 c. a a v60c half-brick series v60c half-brick series mechanical considerations mechanical considerations installation installation although av60c half-brick series converters can be mounted in any orientation, free air-flow- ing must be taken. normally power components are always put at the end of the airflow path or have the separate airflow paths. this can keep other system equipment cooler and increase component life spans. soldering soldering av60c half-brick series converters are compat- ible with standard wave soldering techniques. when wave soldering, the converter pins should be preheated for 20-30 seconds at 110c, and wave soldered at 260c for less than 10 seconds. when hand soldering, the iron temperature should be maintained at 4 25c and applied to the converter pins for less than 5 seconds. longer exposure can cause internal damage to the converter. cleaning can be performed with cleaning solvent ipa or with water. mtbf mtbf the mtbf, calculated in accordance with bellcore tr-nwt-000332 is 2,000,000 hours. obtaining this mtbf in practice is entirely pos- sible. if the ambient air temperature is expected to exceed +25c, then we also advise a heatsink on the av60c half-brick series, orient- ed for the best possible cooling in the air stream. astec can supply replacements for converters from other manufacturers, or offer custom solu- tions. please contact the factory for details.
a a a a v v v v 6 6 6 6 0 0 0 0 c c c c s s s s e e e e r r r r i i i i e e e e s s s s 1 1 1 1 2 2 2 2 v v v v o o o o u u u u t t t t p p p p u u u u t t t t h h h h a a a a l l l l f f f f - - b b b b r r r r i i i i c c c c k k k k p p p p o o o o w w w w e e e e r r r r c c c c o o o o n n n n v v v v e e e e r r r r t t t t e e e e r r r r s s s s 3 3 3 3 6 6 6 6 v v v v d d d d c c c c t t t t o o o o 7 7 7 7 5 5 5 5 v v v v d d d d c c c c i i i i n n n n p p p p u u u u t t t t , , , , 5 5 5 5 0 0 0 0 - - 1 1 1 1 5 5 5 5 0 0 0 0 w w w w o o o o u u u u t t t t p p p p u u u u t t t t usa europe asia tel: 1-760-930-4600 44-(0)1384-842-211 852-2437-9662 fax: 1-760-930-0698 44-(0)1384-843-355 852-2402-4426 www.astec.com recommend hole pattern recommend hole pattern mechanical chart mechanical chart -34- base-plate side view dimensions are in millimeters and (inches). 10.16 (0.400) 10.16 (0.400) 12.7 (0.50) 48.3 (1.90) 48.26 (1.900) 4.8 (0.19) mounting inserts module outline 5.1 (0.20) 57 . 9 (2 . 28) max 17.78 (0.700) 25.40 (1.000) 35.56 (1.400) 25.40 (1.000) 50.8 (2.00) 35.56 (1.400) 61.0 (2.40) -vout -vin ?sense trim +sense case cnt +vin +vout max -vin case cnt +vin +vout +sense trim -sense -vout 5.1 (0.2) 10.16 (0.4) 15.24 (0.6) 4.8 (0.19) 48.26 (1.9) 10.16 (0.4) 10.16 (0.4) 10.16 (0.4) 7.62 (0.3) 7.62 (0.3) 7.62 (0.3) 57.9 (2.28) 61.0 (2.4) mm (inches) 7- 12.7 (0.5) mounting inserts m3 thru hole x4 2- 2.0 (0.08) only +vo and -vo 1.0 (0.04) all pins except +vo and -vo length optional 4.8 (0.189) default base-plate side view tolerances: inches millimeters .xx ! 0.020 .x ! 0.5 .xxx ! 0.010 .xx ! 0.25 pins >4mm ! 0.02inch ( ! 0.5mm) <4mm ! 0.01inch ( ! 0.25mm) pin length option 4.80mm ! 0.5mm 0.189in. ! 0.020in. 3.80mm ! 0.25mm 0.150in. ! 0.010in. 5.80mm ! 0.5mm 0.228in. ! 0.02in. 2.80mm ! 0.25mm 0.110in. ! 0.010in. device code suffix none (default) -6 -7 -8
part number description ss pp c -0 iv l- xxx f yy h n - p - mx -options p = pin length omit this digit for standard 5mm 6 = 3.8mm, 7= 5.8mm iv = input voltage 8 = 2.8mm 05 = range centered on 5v 12 = range centered on 12v enable logic polarity 24 = 18 to 36(2:1), 9 to 36v(4:1) omit for positive enable logic 36 = 20 to 60v n = negative enable 46 = 18v to 75v (4:1) except: ak60c-20h, bk60c-30h 48 = typ 36 to 75v omit for negative logice p = positive logic c = pinout compatability a= astec footprint or "non lucent" footprint h = high efficiency (synch rect.) c= ind std, exact lucent drop in omit h if conventional diode (low eff) yy = output current pp = package type ie. 08 = 8 amps 40 = 1" x 2" smd 42 = 1.5" x 2" smd f = # of outputs 45 = 1.45" x 2.3" (1/4 brk) f = single output 60 = 2.4" x 2.3" (1/2 brk) d = dual output 80 = full size 4.6" x 2.4" 72= 2.35" x 3.3 (3/4 brk) xxx = output voltage format is xx.x (ie 1.8v = 018) ss = series aa = 1/2brick dual (old designator) ak = ind std sizes (1/4, 1/2, full) <150w mx = options am/bm = full size, astec pin out m1,m2 = .25" height heatsink al = half size, astec pin-out m3,m4 = .5" height heatsink bk = ind std size =>150w or feature rich m5.m6 = 1.0" height heatsink av = avansys product note: for some products, they may not conform with the part number description above absolutely. revision q attachment i page 1 of 2
new part number description acs ii v 1 v 2 v 3 v in - e t p mx output voltage a = 5.0v e = 7.5v f = 3.3v b = 12v, c = 15v g = 2.5v l = 8v , h = 24v, r = 28v d = 2.0v / 2.1v omit v2 and v3 if single output y = 1.8v omit v3 if dual output m = 1.5v ie for dual output 5 and 3.3v k = 1.2v v1 =a, v2 = f, v3 =omit j = 0.9v v1 =a, v2 = f, v3 =omit ii = output current max ie 60 = 60 amps vin = input voltage range 300 = 250v to 450v s = size 48 = 36v to 75v f = full brick 24 = 18v to 36v h = half brick 03 = 1.8v to 5.0v q = quarter brick 08 = 5.0v to 13.0v s = 1 x 2 18 pin smt pfc: power factor corrected e = 1 x 2 thru hole c = (.53x1.3x.33) smt (austin lite drop in) e = enable logic for > 15w v = conventional package (2x2.56") or ( omit this digit for positive enable a = sip n = negative logic w = convent pkg (wide 2.5x3) e = enable logic for < 15w r = 1 x 1 thru hole omit this digit for no enable option a = sip 1 = negative logic t = 1.6 x 2 4 = positive logic c = construction trim for 1w to 15w e = enhanced thermals (baseplate or adapter plate) 9 = trim added i = integrated (full featured) hong kong models l = low profile (open frame, no case - isolated) p = open frame (sip or smt) non-isolated p = pin length omit this digit for standard 5mm 6 = 3.8mm 8 = 2.8mm 7 = 5.8 mm mx - factory options customer specific note: for some products, they may not conform with the new part number description above absolutely. revision q attachment i page 2 of 2

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