bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converters 12 vdc input 0.9 vdc - 5.0 vdc/20 a output ? non-isolated ? wide trim range ? fixed frequency (275 khz) ? converter can sink and source ? high efficiency current ? high power density ? ocp/scp ? power good output signal (open collector) ? under-voltage lockout (uvlo) ? remote on/off ? low cost description the bel xrpf-20a1a0 is a new high density open frame non-isolated converter series for space sensitive applications. each model has a wide input range (10.2 vdc - 13.8 vdc) and offers a wide range of output voltage (0.9 vdc - 5.0 vdc) with a 20 a load. an external resistor adjusts the output voltage from its pre-set value of 0.9 vdc to any value up to the 5.0 vdc maximum. typical efficiency is 92% at vo=5 vdc, vin=12 vdc at full load. typical features include remote on/off, under-voltage lockout, over-current protection and short circuit protection. part selection output voltage input voltage max. output current max. output power typical efficiency model number vertical mount model number horizontal mount 0.9 v - 5.0 v 12 v 20 a 100 w 92% vrpf-20a1a0 0rpf-20a1a0 notes : 1. add ?g? suffix at the end of the model number to indicate tray packaging. 3. all part numbers above indicate rohs 6. change the second letter "r" to "7" for rohs 5 part numbers. absolute maximum ratings parameter min typ max notes input voltage (continuous) -0.3 v - 13.8 v output enable terminal voltage -0.3 v - 13.8 v ambient temperature 0 c - 80 c storage temperature -40 c - 125 c input specifications parameter min typ max notes input voltage 10.2 v - 13.8 v input current (source) vo=5.0 v vo=2.5 v vo=0.9 v - - - 9.1 a 4.9 a 2.2 a - - - input current (sink) vo=2.5 v vo=0.9 v - - -3.44 a -0.97 a - - able to sink 20 a output current at any output voltage up to and including 2.5 v. input current (no load) - 95 ma - remote off input current - 5 ma 10 ma xrpf-20a1a0 rohs com p liant rev.a
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converters 12 vdc input 0.9 vdc - 5.0 vdc/20 a output input specifications (continued) parameter min typ max notes input reflected ripple current (pk-pk) vo=5.0 v vo=3.3 v vo=2.5 v vo=0.9 v - - - 280 ma 250 ma 200 ma 150 ma 350 ma 320 ma 280 ma 250 ma input reflected ripple current (rms) vo=5.0 v vo=3.3 v vo=2.5 v vo=0.9 v - - - 80 ma 70 ma 45 ma 40 ma 120 ma 100 ma 80 ma 60 ma tested with simulated source impedance of 1.5 uh 5hz to 20 mhz, and 2 270 uf/16 v oscon capacitors (esr 20 m ? ) at the input external input capacitance - 540 uf - turn-on voltage threshold 8.5 v 9.0 v 9.5 v turn-off voltage threshold 7.0 v 7.6 v 8.3 v note : all specifications are typical at 25 c unless otherwise stated. output specifications parameter min typ max notes output voltage set point -2.5%vo,set - 2. 5%vo,set vin=12 v, lo=lomax, full load output voltage set point -3.5%vo,set - 3.5%vo,set over all operating input voltage, resistive load, and temperature conditions load regulation vo=5.0 v vo=3.3 v vo=2.5 v vo=0.9 v - - - - - - - - 0.4%vo,set 0.4%vo,set 0.5%vo,set 1%vo,set io=iomin to iomax line regulation - - 0.5%vo,set vin=vinmin to vinmax output ripple and noise (pk-pk) vo=5.0 v vo=3.3 v vo=2.5 v vo=0.9 v - - - - 65 mv 60 mv 55 mv 45 mv 80 mv 75 mv 70 mv 55 mv tested at 0-20 mhz bw, with a 680 uf/6.3 v oscon capacitor (esr 12 m ? ), 10uf/16v tantalum capacitor, and 10nf ceramic capacitor at the output. output ripple and noise (rms) vo=5.0 v vo=3.3 v vo=2.5 v vo=0.9 v - - - - 18 mv 15 mv 15 mv 10 mv 25 mv 25 mv 20 mv 15 mv output current 0 a - 20 a current limit threshold 25 a - 40 a short circuit surge transient - - 0.1 a 2 s turn on time - 5 ms 10 ms overshoot at turn on - 0%vo 3%vo output capacitance vo=5.0 v vo=2.5 v vo=0.9 v 680 uf 680 uf 680 uf - - - 5080 uf 7840 uf 11000 uf transient response 50% ~ 75% max load - 100 mv 150 mv settling time - 40 us 80 us 75% ~ 50% max load - 100 mv 150 mv settling time v o =0.9 v- 5.0 v - 40 us 80 us di/dt=2.5 a/us; vin=12 v; with a 680 uf/6.3 v oscon capacitor (esr 12 m ? ), 10 uf/16 v tantalum capacitor and 10 nf ceramic capacitor at the output. note : all specifications are typical at nominal input, full load at 25 c unless otherwise stated.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converters 12 vdc input 0.9 vdc - 5.0 vdc/20 a output general specifications parameter min typ max notes efficiency (current source) vo=5.0 v vo=3.3 v vo=2.5 v vo=0.9 v 89% 86% 83% 65% 92% 89% 86% 69% - - - - efficiency (current sink) vo=2.5 v vo=0.9 v 79% 60% 82% 63% - - measured at vin=12 v, full load. switching frequency 240 khz 275 khz 310 khz output voltage trim range 0.9 v - 5.0 v vo=0.9 v when the trim pin is open. mtbf 5,570,000 hours calculated per bell core sr-332 (i o = nominal; t a = 25 c) dimensions inches (l w h) millimeters ( l w h ) 1.2 x 1.1 x 0.457 30.48 x 27.94 x 11.6 vrpf-20a1a0 dimensions inches (l w h) millimeters ( l w h ) 1.2 x 1.1 x 0.508 30.48 x 27.94 x 12.91 0rpf-20a1a0 weight - 15 g - note : all specifications are typical at 25 c unless otherwise stated. control specifications parameter min typ max notes remote on/off signal low (unit off) -0.3 v - 0.8 v signal high (unit on) 2.4 v - 13.8 v remote on/off pin open, unit on. power good power good delay 1 - - 8 ms note : all specifications are typical at 25 c unless otherwise stated. 1. the power good signal is an open collector output. when the output of the module reaches 90% of the nominal set point, the power good pin is set high. output trim equations equation for calculating the trim resistor (in k ? ) given the desired adjusted voltage (vadj) is shown below. the trim up resistor should be connected between the trim pin and ground. trim values should not be less than 280 ? . 9 . 0 17 . 1 ? = adj trim v r equation for calculating the trim voltage (in v) given the desired adjusted voltage (vadj) is shown below. the trim up voltage should be connected between the trim pin and ground. ) 9 . 0 ( 17 . 1 ) 17 . 1 3 . 1 ( ? ? ? = adj v rs vt rs rt rtrim module vout gnd trim vt module vout gnd trim rt rs
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converters 12 vdc input 0.9 vdc - 5.0 vdc/20 a output efficiency data 5.0v vout(source) 78.0% 81.0% 84.0% 87.0% 90.0% 93.0% 2.0 5.0 10.0 15.0 20.0 output current (a) efficiency 10.2v 12.0v 13.8v 2.5v vout(source) 73.0% 76.0% 79.0% 82.0% 85.0% 88.0% 91.0% 2.0 5.0 10.0 15.0 20.0 output current (a) efficienc y 10.2v 12.0v 13.8v 0.9v vout(source) 50.0% 55.0% 60.0% 65.0% 70.0% 75.0% 80.0% 85.0% 2.0 5.0 10.0 15.0 20.0 output current (a) efficienc y 10.2v 12.0v 13.8v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converters 12 vdc input 0.9 vdc - 5.0 vdc/20 a output thermal derating curves vo=5 v; vin=12 v vo=2.5 v; vin=12 v vo=0.9 v; vin=12 v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converters 12 vdc input 0.9 vdc - 5.0 vdc/20 a output ripple and noise waveforms 12 v input, 5.0 v output 12 v input, 2.5 v output 12 v input, 0.9 v output note: ripple and noise at full load, 0-20mhz bw, with 680 uf/6.3 v oscon cap, 10 uf/16 v tan cap and 10 nf ceramic cap at the output, ta=25 deg c.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converters 12 vdc input 0.9 vdc - 5.0 vdc/20 a output transient response waveforms 75% to 50% load step, 5.0 vdc output 50% to 75% load step, 5.0 vdc output 75% to 50% load step, 2.5 vdc output 50% to 75% load step, 2.5 vdc output 75% to 50% load step, 0.9 vdc output 50% to 75% load step, 0.9 vdc output note: transient response at di/dt=2.5 a/us, with a 680 uf/6.3 v oscon cap, a 10 uf/16 v tan cap and a 10 nf ceramic cap at the output, ta=25 deg c.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converters 12 vdc input 0.9 vdc - 5.0 vdc/20 a output mechanical outline vrpf-20a1a0 pin connections pin function 1 vout 2 vout 3 vout 4 trim 5 remote on/off 6 power good 7 ground 8 ground 9 reserved 10 vin 11 vin
? 2007 bel fuse inc. specifications subject to change without notice. 020507 corporate far east europe bel fuse inc. bel fuse ltd. bel fuse europe ltd. 206 van vorst street 8f/ 8 luk hop street preston technology management centre jersey city, nj 07302 san po kong marsh lane, suite g7, preston tel 201-432-0463 kowloon, hong kong lancashire, pr1 8ud, u.k. fax 201-432-9542 tel 852-2328-5515 tel 44-1772-556601 www.belfuse.com fax 852-2352-3706 fax 44-1772-888366 www.belfuse.com www.belfuse.com non-isolated dc/dc converters 12 vdc input 0.9 vdc - 5.0 vdc/20 a output mechanical outline (continued) 0rpf-20a1a0 rohs compliance complies with the european directive 2002/95/ ec, calling for the elimination of lead and other hazardous substances from electronic products. pin connections pin function 1 vout 2 vout 3 vout 4 trim 5 remote on/off 6 power good 7 ground 8 ground 9 pwrgd_set 10 vin 11 vin 12 support pin 13 support pin
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