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| lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 1 lc 5710 s data sheet rev. 1.9 sanken electric co., ltd. http://www.sanken - ele.co.jp
lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 2 contents general descriptions ................................ ................................ ................................ ................. 3 1 . absolute maximum ratings ................................ ................................ ............................ 4 2. recommended operation conditions ................................ ................................ ............. 4 3. electrical characteristics ................................ ................................ ................................ . 5 4. functional block diagram ................................ ................................ ............................... 7 5. pin assign & functions ................................ ................................ ................................ .... 7 6. typical application circuit ................................ ................................ ............................. 8 7. package information ................................ ................................ ................................ ........ 9 8. functional description ................................ ................................ ................................ ... 10 8.1 settlement of the operating frequency ................................ ................................ . 10 8.2 pmw current control ................................ ................................ .......................... 10 8.3 led dimming ................................ ................................ ................................ ........ 11 8.4 overcurrent protection function (ocp) ................................ ............................ 12 8.5 overvoltage protection function (ovp) ................................ ............................. 13 8.6 selection of application circuit ................................ ................................ ............. 13 8.7 setting of external inductor ................................ ................................ ................. 15 8.8 the internal power dissipation pd ................................ ................................ ...... 18 8.9 phase compensation (comp terminal) ................................ .............................. 20 8. 10 led cross - connection protection function ................................ .................... 24 8. 11 peripheral parts design ................................ ................................ ...................... 25 8. 12 reference design example ................................ ................................ ................. 26 9 . example pattern layout ................................ ................................ ................................ 27 10 . design considerations ................................ ................................ ................................ .. 29 11 . typical caracteristics(ta=25 important notes ................................ ................................ ................................ ........... 41 lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 3 general descriptions the lc57 10 s product is the power ic for led driver which incorporates a power mosfet and a control ler ic in a package. this product is a dc/dc converter which features are; wide input voltage range, 100khz to 500khz operating frequency, and b uck/ b oost/ b uck - b oost convert e r can be selected with external circuit configuration . led string current can be set with the external resistor , and led dimming can be controlled by the digital input signal or dc - bias . the rich set of protection features helps to realize low component counts, and high performance - to - cost power supply. package sop 8 features ? operation t ype s : t he following convert e r types are applicable by the external circuit configuration ? buck convert e r ? boost convert e r ? buck - boost conver te r ? high efficienby: > 90%(typ) ? operation frequency: 100khz to 500khz( adjustable) ? led string current set ting with an external r esistor . ? current detection voltage of led string: 10 0mv 3 % thus, l ow power loss and high accuracy led string current can be achieved by setting of an external resistor . ? pwm dimming frequency: available to 20 000 hz(max) ? analog dimming by the dc - bias(0 to 2v) ? package: hsop8 heat sla g in the back can increase h eat dissipation effect by connecting it to gnd pattern ? protection functions ? overcuurent protection function (ocp) ------ pulse - by - pulse basis ? overvoltageprotection function (ovp) ------ auto restart ? thermal shutdown protection function (tsd) ------ auto restart ? led cross protection characteristics input voltage range 5 v ( min ) 58 v( max ) r ds(on) 550 m(typ) application s ? led lighting fixtures ? l ed light bulbs product number lot number y= the last digit of the year (0 to 9) m= month ( jan to sep: 1 to 9 date = 1 to 10:1 date = 11 to 20:2 date = 21 to 31:3 *our control number (4 digit) marking lc5710 sk ymw xxxx lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 4 1. absolute maximum ratings ? certain details refer to the specification sheet of this product. ? the polarity value f or current specifie s a sink as + , and a source as ?, referenci ng the ic. ? unless specifically noted, ta is 25 c table.1 characteristic pins symbol rating unit notes vin pin voltage 5 in ? 4D sw ? 6 D csp ? 7 D csn ? 6 D csp - csn ? 1 D comp ? 8 D dim ? 2 D rt ? (1) (2) D d 1. 2 w junction temperature in operation (3 ) D j 125 c thermal resistance (junction - ambient air) (2) D (junction - pin no. 3 ) D operating ambient temperature (1) D t op ? c storage temperature D stg ? (1) however , it is limited by junction temperature . ( 2 ) when mounted on a 4 0 4 0mm glass - epoxy board (copper area in a 25 25mm). ( 3 ) thermal shutdown temperature is approximately 150 c 2. recommended operation conditions ? r ecommended o peration c onditions are the required operating conditions to maintain the nor mal circuit functions described in the electrical ch aracteristics. in actual operation , it should be within these conditions. ? the polarity value for c urrent specifies a sink a s + and a source as ? referen cing the ic. ? unless specifically noted, ta is 25 c table.2 characteristic pins symbol min max unit notes vin pin voltage 5 ? in 5 5 8 v output current (4) D (5) buck 0 0.5 (5) boost/buckboost dim terminal voltage 8 ? v dim v dim(off) 2.5 v analogue dimming dim terminal dimming frequency 8 ? f dim 100 20000 hz digital dimming peak to p eak inductor ripple current D S operating ambient temperature (4) D t op - 40 +85 ( 4 ) to be used within the allowable package power dissipation characte ristics (fig. 1 ) (5) buck circuit 1a, boost circuit buck - boost circuit 0.5a, each condition is S il Q 0.4a. lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 5 3. electrical characteristics ? certain details refer to the specification sheet of this product. ? the polarity value f or current specifies a sink as + and a source as ? , referencing the ic. 3.1 electrical characteristics of control part (mic) unless specifically noted, ta is 25 c, v in =15v table.3 parameter terminal symbol ratings units remarks m i n t y p m a x o p e r a t i o n s t a r t v o l t a g e 5?3 v in (on) 3.8 4.1 4. 5 v operation stop voltage 5?3 v in (off) 3.4 3.7 4. 2 v operation hysteresis voltage 5?3 v in ( hys ) 0. 25 0. 37 0. 50 v supply current (6) 5?3 i in (on) D 1.6 D ma supply current in no operation (6) 5 ? 3 i in (o ff ) D 0.24 D m a v in = 3 v oscillator frequency1 D f osc 1 8 0 100 1 35 khz r rt = 180 k oscillator frequency 2 D f osc 2 350 500 65 0 khz r rt =18k minimum on time D t on(min) 100 20 0 3 00 ns v comp = 0 v maximum duty cycle D d max 84 9 0 9 5 % v comp = 2.8 v current sense voltage 6 ? 7 v cs 97 100 103 mv sw current limit 4 ? 3 i sw(lim) 1. 4 1. 8 2.2 a csp input current 6 ? 3 i csp 22 35 50 a csn input current 7 ? 3 i cs n 5 9.5 18 a comp terminal source current 1 ? 3 i co mp(so) - 65 - 50 - 35 a v cs = 20m v v comp = 2 v comp terminal sink current 1 ? 3 i co mp(s i ) 35 50 65 a v cs = 180m v v comp = 2 v error amplifier conductance (6 ) D g m D 4.2 D m s v cs = 70 ~13 0mv over voltage threshold 6 ? 7 v cs(ovp) 1 4 0 150 16 0 mv setup time of watch dog timer (6 ) D t wdt D 30 D m s vcomp = 2.5v vcs= short dim voltage in led on at dimming mode 8 ? 3 v dim(on) 0.1 7 0. 20 0. 23 v dim voltage in led off at dimming mode 8 ? 3 v dim(o ff ) 0.1 2 0. 15 0. 18 v dim hysteresis voltage at dimming mode 8 ? 3 v dim( hys ) 10 50 100 mv thermal shutdown (6 ) D tsd D 1 65 D c thermal shutdown hysteresis (6 ) D tsd (hys) D 22 D c (6 ) guaranteed by design, not tested . lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 6 3.2 allowable package power dissipation when mounted on a 4 0 4 0mm glass - epoxy board (copper area in a 25 25mm). fig.1 package power dissipation of LC5710S (thermal derating curve) note1 : the power dissipation in fig.1 is calculated at the junction temperature 1 25 . lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 7 4. functional block diagram fig.2 block diagram 5. pin assign & functions table.4 pin no. symbol functions 1 comp external phase compensation terminal. 2 rt for adjust switching frequency,connect rrt resisitor to ground. 3 gnd ground terminal. 4 sw switching output. s witching node that drives the external inductor. 5 vin supply input. input capacitor cin is connected between vin and gnd. 6 csp current sense input positive. r eference potential for the current sense input. 7 csn current sense input negative. connect current sense resistor to s ense output current . 8 dim pwm dimming signal input. and analog dimming is possible as to input of dc voltage that is : v dim ( off ) lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 8 6. typical application circuit examples for led lighting power supply a) buck application b) boost application c) buck - boost application fig.4 typical application circuit of LC5710S lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 9 7. package information sop8 package notes 2 : 1) all dimensions are in millimeter 2) p b - free. device composition compliant with the rohs directive 3) drawing is not to scale. fig.5 sop8 package outline top view side view 1 1 2 3 4 8 7 6 5 side view 2 lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 10 8. functional description all of the parameter values used in these descriptions are typical values of the electrical characteristics , unless they are specified as minimum or maximum. wit h regard to current direction, + indicates sink current (toward th e ic) and C indicates s ource current (from the ic). 8.1 settlement of the operating frequency the operating frequenc y of the LC5710S is adjust able with the value of setup resistor r rt that is connected between rt terminal (2 pin) and gnd terminal (3 pin). this frequency fosc can be calculated with an equation (1). the relations of the frequency t o the resistance valu e of r rt are shown in the fig . 6. fosc(hz)={4.74 (24 r rt ) 0.365e - 6} 21.5e - 12 ??? (1) *unit of r rt = ( ) fig.6 r rt vs. fosc 8.2 pwm current control the current contro l circuit is shown in fig.7 . for enhanced response speed and stability, current mode control (peak current mode contr ol) is used for constant current control of the output current . the operating frequency, f osc is adjustable between 100khz and 500khz by the setting resistor r rt . 0 100 200 300 400 500 600 10 100 operating frequency fosc(khz) r rt (k) rt vs. fosc characteristic fig.7 current control circuit r o v p r c s c o u t l e d o u t p u t v o l t a g e v c s r s q o s i l l a t o r s w c s p c s n + + + e x t e r n a l c o m p o n e n t s c o m p c s r s 4 7 6 1 + lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 11 led string current is detected by the current detection resist or, r cs . the voltage of r cs is detected by both csp and csn pins . this ic compares this voltage with the current detection voltage , v cs , and makes a target value for current control. the constant current is controlled so that the detection voltage of peak current of internal power mosfet is close to the target value , and thus the led string current i s constant. the constant current of led string, i out , is calculated by the following with r cs as the current detection resistor and r ovp as the resistor for over voltage protection in the case that led string is open. ??? (2 ) where; i csn : the csn pin sink current , 9.5 a. v cs : the current detection voltage , 100mv. also, i out can be expressed by the following , if i csn (r cs +r ovp ) is neg ligibly smal l against v cs . ??? ( 3 ) r ovp value should be chosen so that i out is within the acceptable accuracy range referring to the calculation in 8.5 overvoltage protection f unction (ovp) . 8.3 l ed dimming 8.3.1 analog dimming the d imming of LC5710S copes with both of analog (the input of a dc voltage) and pwm - digital - dimming. th ough it is analog - dimming first , t here are relations of the fig.8 (a),(b) in the inpu t dc voltage of the dim pin and the dimming - ratio. moreover,dimming by the pull - down resistor r dim is possible by using a i nternal current - source of the ic, too. t he relations of the dim pin voltage and r dim are shown by the figure 8 (b). dimming ratio is 100% when the dim pin voltage is more than dc 2v. fig.8(a) dim pin voltage vs. led current fig.8(b) pull - down resistor r dim vs. dim pin voltage fig.8 i the connection of r dim and remote on off application from the port of the microcomputer of the use and so on, and if the dim pin of LC5710S is held continuously to the low level,LC5710S continues suspension of a movement. the low level voltage must be lower voltage than v dim ( off ) . for reverse logic, put one small signal transistor as the fig8 i . though LC5710S doesn't have an exclusive "remote on/off pin", but, "remote on/off function" is as well as possible by using a dim pin. cs ovp cs csn cs out r ) r r ( i v i ? ? ? ? cs cs out r v i ? lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 12 8.3.2 pwm digital dimming led dimming is controlled by the duty cycle of pwm digital signal which is input to dim terminal . the constant current output turns on / off by the following signal input voltage to dim pin which is withi n the absolute maximum rating; ? 0.3v to 3.3 v. ? when the dim termina l voltage is higher than led - on - threshold (v dim(on) R 0.2v) , i out flows. ? dim terminal voltage hys teresis v dim(hys) =50mv. the dimming - ratio depends on the d uty ratio of the pwm - digit al - dimming signal pulse (fig . 9) . as well as the case of the analog - dimming, if the signal of the low level lower than vdim (off) is inputted to dim - pin continuously, the suspension of a movement is continued. as for the fig9 as well, when a dimming signal (ch2:pale - blue ) is a low level, the switch - pin voltage waveform(ch1:blue) isn ? t switching. fig.9 actual waveform in dimming operation pwm dimming with 1khz, duty 25% pwm dimming with 1khz , duty 50 % pwm dimming with 1khz , duty 75 % pwm dimming with duty 100 % ch2: dimming signal (2v/div) ch3 : led current (0.2a /div) ch1 : sw pin voltage (10 v/div) lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 13 8.4 o vercurrent protection function ( ocp ) the i c incorporates o v ercurrent protection f unction (ocp) limit ed the current flow ing to sw terminal (fig.10 ) . when t he current to sw terminal reaches i sw(lim) = 1.8 a , the internal power mosfet turns off on pulse - by - pulse basis .this protection is activated in case of the constant current detection failu re or the o utput end short ed . 8.5 o vervoltage protection function (o vp ) if led string is open and the constant current loop is cut, the output voltage increases more than the controlled voltage. as shown in fig.11 , the ovp function with the circuit connected r ovp and a zener diode, dz ovp , is done ovp protection. after led string is open, when dz ovp is conducted, the output voltage is limited to the sum voltage of the zener voltage of dz ovp and the overvoltage protection (ovp) thresho ld voltage, v cs =150 mv. the allowable current of dz ovp , i dz , can be expressed by the following with p dz as the allowable dissipation and v dz as the zener voltage of dz ovp . ??? ( 4 ) the r ovp value, by which the loss of dz ovp is less than the allowable dissipation, is chosen by the following with i csn as the csn pin sink current and r cs as the constant current detection resistor . ??? ( 5 ) also, when i csn is negligibly small against i dz , the appro ximate equation of equation (4 ) becomes as follows. ??? ( 6 ) r ovp value should be chosen so that the loss of dz ovp is less than the allowable dissipation in ovp protection, and i out is within the acceptable accuracy range. dz ovp value, v dz , should be chosen to be higher than the maximum output voltage of led string to avoid dz ovp fig.10 overcurrent protecton circuit fig.11 overvoltage protection circui t normal operation led string is open dz dz dz v p i ? cs csn dz ) ovp ( cs ovp r i i v r ? ? ? cs dz ) ovp ( cs ovp r i v r ? ? s w + p w m l o g i c o c p g n d 4 3 c s p c s n r o v p r c s c o u t l e d d z o v p 6 7 c s p c s n r o v p r c s c o u t d z o v p 6 7 i o u t i c s n i c s n i d z lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 14 conduction during the normal operation. for example,when these conditions are v cs =150mv,i csn =9.5 a,i dz =5ma,r cs =0.33 , because of i csn << i dz , rovp becomes 29.67 ( P 30 ) th at is calculated following the equation ( 6 ) . 8.6 selection of application circuit select application circuit properly in the relations with the led strings voltage and the input voltage vin in the t able 5 . table.5 relations between the input voltage and the led string voltage . circuit type vin fled ) fled ) fled ) C 4) as a factor which a movement condition is restricted to. 1) settlement of the input voltage under vin ( on ) ??? the setup that vin is under 5v is impossible by the start condition of the ic. 2) vin (max) or vsw (max ) ??? as an example, the condition that vin or vsw voltage reaches 48v by 80% - derating against 60v which is the absolute maximum ratings. 3) a limitation (0.15 lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 16 8.7 setting of external inductor the each operation of b uck , b oost and buck - b oost converter is explained as follows. the inductance value is designed so that the operation becomes continuous conduction mode ( ccm) which the induct ance current flows continuously, because the load current of led lighting application is constant. the d uty , d , is set within the following range , based on 3. electrical c haracteristics . t on(min) f osc d d max ??? (7) therefore, duty - d is wit hin the range of 0.84 from 0.15 ( 0.15 d 0.84). the output voltage, v out , can be calculated by the following with v out as the output voltage , il as the inductor current , and il as the ripple current of inductor current. vout= n v fled v cs ??? (8) where; v fled : f orward voltage drop of a led ( ??? v f = 3.5v 1 pcs ) n : the number of led in series v cs : current detection v oltage, v cs = 100mv table.7 e quation s to calculat e n ecessary inductance l buck type boost type buckboost type sw terminal voltage vsw vin vout vin ave iled S S S S S S S il=0.1a to 0.4a , it is based on a recommendation. and, by the condition of internal - over - current - protection, because it is required that ind uctor - peak - current ilp doesn ? t reach i sw (lim) =1.4a (min) . substantially, the current which can be supplied to led becomes as follows (you must satisfy toget her a temperature limitation referring to the fig.1). *buck - type ??? 1.0a *boost - type/buckboost - type ??? 0.5a a calculation example graph is shown as follows (refer to the fig 15 the fig17 ). and, a v f of white - led for the lighting is prescribed with 3.5v, and calculated with 5pcs series - connection (vout=17.6v). lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 17 fig.15 fig.16 1 10 100 1000 0.1 0.15 0.2 0.25 0.3 0.35 0.4 necessary inductance l(h) S fosc=500khz fosc=300khz fosc=100khz 1 10 100 1000 0.1 0.15 0.2 0.25 0.3 0.35 0.4 necessary inductance l(h) S fosc=500khz fosc=300khz fosc=100khz lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 18 f ig.17 fig15 fig17 necessary inductance l calculation example *f osc = 100khz,300khz,500khz *number of led = 5pcs series the value of graph is calculated following the equation in the table7 note: *necessary inductance valu e grows big by the setup whose S il is small . as a tendency of characteristics of the inductor, ? in case of big inductance value, allowable current limits decrease. ? the contour of inductor becomes large with the c ore size when allowable current is satisfied and inductance is kept. as a circuit application of the led driver, it has buck - type, boost - type and buckboost - type as same as the dc/dc converter, as a setup of S il, generally, it is said that the cost performance of 20% - 30 % of the setups of output current is the best. when it says easily, S il=iout ( =0.2 to 0.3) is best choice. 1 10 100 1000 0.1 0.15 0.2 0.25 0.3 0.35 0.4 necessary inductance l(h) inductor - ripple current S il(a) buckboost - type necessary inductance l calculation example led=5pcs series,vin=vout 20% fosc=500khz fosc=300khz fosc=100khz lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 19 8.8 the internal power dissipation pd 8.8. 1 the loss pcont of the control circuit the loss pcont of the control circuit depends on the inpu t voltage and frequency. (fig.1 8 ) . fig.18 the loss of the control circuit is prescribed with containing the steady loss by circuit static electric current iq and the drive loss which drives internal powermosfet. a fig. 1 8 is the total of the loss of circuit electric current and the drive loss. r ead near value in the fig . 1 8 , and substitute it when you calculate a loss. 8.8.2 the switching - speed of internal powermosfet as for the fig.1 9 , in the calculation of the switching - time of internal powermosfet, this is based on the assumption with no influence such as prasitic - inductance in main - circuit. it is prescribed with turn - on time tr and turn - off time tf being the same speeds. fig.19 however,actually,the internal powermosfet is connected with the main - circuit of the voltage conversion pa rt. by the condition of pattern wiring, the switching - speed becomes fast, or becomes slow. ? in case of the pattern which parasitic - inductance inheres in, probably it becomes fast. ? in case of the pattern which high - impedance inheres in, probably it becomes slow. approve it in advance. there is no problem if actual measurement value is substituted when an actual movement wave form can be observed with oscilloscope and so on. 0 10 20 30 40 50 60 70 80 90 100 0 5 10 15 20 25 30 35 40 45 50 the loss of control circuit pcont (mw) vin(v) LC5710S vin vs. pcont characteristics fosc=100khz fosc=300khz fosc=500khz 0 5 10 15 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 50 the switching time(tsw:tr,tf) (nsec) sw terminal voltage vsw(v) LC5710S sw terminal voltage vs. tsw characteristics lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 20 8.8.3 the loss of internal powermosfet . as the loss of internal - powermosfet, there are the loss of steady - on by the on - resistance ron between the source and drain , and the switching - loss by the switching - time in the fig.1 9 . buck - type, boost - type and buckboost - type, the loss of powermosfet of each type are shown the approximation in the table 8 . table.8 loss of steady 2 tonfosc 2{vin(iled ave ) 2 tonfosc 2{vout(il ave ave ) 2 tonfosc 2{(vin ave ? ton=(1 fosc) d ??? d =duty (refer to table7 .) ? tsw is prescribed by the value (sec) of the figure 1 9 with turn - on time tr and turn - off time tf being the same speeds. in the same period, switching occurs twice. there is no problem if actual measurement value is substituted when an actual movement wave form can be observed with oscilloscope and so on. ? fosc = oscillat ing frequency (hz) ? in case of the buck - type, iled (a) =il ave (a) ? refer to a t able 7 for i lave (a). ? ron is on - resistance() of the internal powermosfet, between drain and source. 8.8.4 power dissipation in the ic, pd the inter nal loss is to follow a equation (9). pd=pcont pon psw ??? (9) ( calculation example in the buck - type ) conditions: fosc=300khz ? vin=24v ? led strings voltage =17.6v(5 leds ) ? iled=1a ? ron=0.5 . ? pcont=44mw ( it was referred from fig.16. ) ? pon=0.5( ) 1(a) 1(a) 2.444e - 6(sec) 300e+3(hz) P 0.367w ? psw=2 {24(v) (1(a) 2) 20e - 9(sec) 300e+3(hz)} P 0.144w pd=0.044(w) 0.367(w) 0.144(w) =0.555w ( calculation example in the boost - type ) conditions: fosc=300khz ? vin=12v ? led strings voltage =17.6v(5 leds ) ? iled=0.5a ? ron=0.5 . ? pcont=22mw ( it was referred from fig.16. ) ? pon=0.5( ) 0.73(a) 0.73(a) 1.061e - 6(sec) 300e+3(hz) P 0.084w ? psw=2 {17.6(v) (0.73(a) 2) 15e - 9(sec) 300e+3(hz)} P 0.057w pd=0.022(w) 0.084(w) 0.057(w) =0.163w ( calculation example in the buckboost - type ) conditions : fosc=300khz ? vin=17v ? led strings voltage =17.6v(5 leds ) ? iled=0.5a ? ron=0.5 . ? pcont=33mw ( it was referred from fig.16. ) ? pon=0.5( ) 1.018(a) 1.018(a) 1.696e - 6(sec) 300e+3(hz) P 0.264w ? psw=2 {(17(v) 17.6(v)) (1.018(a) 2) 28.8e - 9(sec) 300e+3(hz)} P 0.305w pd=0. 033(w) 0.264(w) 0.305(w) =0.602w notes: the thermal resistance j - a of the package is becomes 82.8 ( w ) . thermal shutdown( protection function : tsd) may activate by the condition of pd. when ambient temperature is defined as ta , junction temperature tj is shown with a equation (10). tj=(pd j - a) ta ??? (10) lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 21 the on - resistance ron of internal powermosfet has a positi ve temperature coefficient. when tj is nearing 100( ) , ron has the possibility to increase ab out 1.5 times from condition of tj=25( ). * be careful. when temperature of the ic is high , you must have the following item reduced. ? oscillating frequency ? value of the iled ? the number of led serial connection or, you must establish the input voltage condition again, you m ust put pd within the area of thermal derating curve in the fig .1 . 8.9 phase compensation (comp terminal ) 8.9.1 the calculation of the phase compensation fixed - number . in the page8, the fig . 4 of sixth clauses C typcal application circuit example, as for the phase - compensation fixed - number of the comp terminal connection, rs, cs, cp , they are calculated in accor dance with the equation of the t able 9 . table.9 rs cs equivalent serial resistance of the output capacitor () , r l ed : the resistance when led was considered a resistance load () , il ed : average current of led (a), fz2 : the zero point frequency which is characteristic of boost - type (hz) ??? this does the function of the zero in the gain - characteristics, and this does the function of the pole in the phase - compensation. l : inductance of the main inductor (h) , d : duty (on - period/period of a cycle), refer to t able5 . *cp is necessary because esr is big when a output capacitor c out is aluminum electrolytic capacitor. the setup of crossover - frequency fc is different in the buck - type and the boost - type. in this ic , at the case of buck - type, fc is set up in less than 1/ 50 of fosc. but, it has the condition of ? a righthalf plane zero ? in case of boost - type of the current - mode. therefore you must calculate fz2 by the equation of fz2 of the t able 9 , and you must set up crossover - frequency fc in less than 1/ 50 of fz2. * k is the multiplier which is characteristic of the feedback loop of LC5710S. k=2.497e - 4 lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 22 8.9.2 rs , cs , calculation example ( c out : ceramics capacitor ) table. 10 buck - type , fosc=500khz , iled=1a , S il=0.4a n umber of led serial connection vout (v) vin (v) inductance l ( h) co total capacitance ( f) co total esr (m ) fc (khz) rs (k ) cs (n f) 1 3.6 5 5.6 1 10 10 0.91 70.348 2 7.1 12 15 1 10 10 1.79 35.669 3 10.6 15 18 1 10 10 2.67 23.892 4 14.1 18 18 1 10 10 3.55 17.961 5 17.6 24 27 1 10 10 4.43 14.389 6 21.1 28 27 1 10 10 5.31 12.002 7 24.6 36 39 1 10 10 6.19 10.294 8 28.1 42 39 1 10 10 7.07 9.012 9 31.6 42 43 1 10 10 7.95 8.014 10 35.1 48 47 1 10 10 8.83 7.215 *the numerical value in the table shows value in calculation. * select a part from the near fixed - number , because numerical value doesn ? t agree completely in the geometric progression such as e12 series and e24 series. * decide a fixed - number after you surely confirm a movement in the experiment. *t he capacity of cout and esr are the expressions of ? the total ? . when ceramics capacitor of the little size more than one are connected in parallel , it is shown that it becomes the numerical value of the table in the total. * table 13 and t able17 are the same situations,too. table.11 buck - type, fosc=300khz, iled=1a, S il=0.4a n umber of led serial connection vout (v) vin (v) inductance l ( h) co total capacitance ( f) co total esr (m ) fc (khz) rs (k ) cs (n f) 1 3.6 5 9.1 4.7 10 6 2.55 41.577 2 7.1 12 27 4.7 10 6 5.04 21.081 3 10.6 15 27 4.7 10 6 7.52 14.120 4 14.1 18 27 4.7 10 6 10.00 10.615 5 17.6 24 43 4.7 10 6 12.48 8.504 6 21.1 28 47 4.7 10 6 14.96 7.093 7 24.6 36 68 4.7 10 6 17.45 6.084 8 28.1 42 82 4.7 10 6 19.93 5.326 9 31.6 42 68 4.7 10 6 22.41 4.736 10 35.1 48 82 4.7 10 6 24.89 4.264 table.12 buck - type, fosc=100khz, iled=1a, S il=0.4a n umber of led serial connection vout (v) vin (v) inductance l ( h) co total capacitance ( f) co total esr (m ) fc (khz) rs (k ) cs (n f) 1 3.6 5 27 10 10 2 1.81 175.872 2 7.1 12 75 10 10 2 3.57 89.174 3 10.6 15 82 10 10 2 5.33 59.730 4 14.1 18 82 10 10 2 7.09 44.903 5 17.6 24 120 10 10 2 8.85 35.973 6 21.1 28 150 10 10 2 10.61 30.006 7 24.6 36 200 10 10 2 12.37 25.737 lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 23 8 28.1 42 270 10 10 2 14.13 22.531 9 31.6 42 200 10 10 2 15.89 20.036 10 35.1 48 270 10 10 2 17.66 18.038 table.13 boost - type, fosc=500khz, iled=0.5a, S il=0.4a n umber of led serial connection vout (v) vin (v) inductance l ( h) co total capacitance ( f) co total esr (m ) fc (khz) rs (k ) cs ( f) 2 7.1 5 7.5 1 10 2.990 0.53 0.398 3 10.6 5 15 1 10 1.001 0.27 2.382 3 10.6 7 12 1 10 2.454 0.65 0.396 4 14.1 7 18 1 10 1.230 0.44 1.187 4 14.1 9 18 1 10 2.033 0.72 0.434 5 17.6 12 20 1 10 2.606 1.15 0.211 6 21.1 12 27 1 10 1.610 0.85 0.463 6 21.1 15 22 1 10 3.087 1.64 0.125 7 24.6 12 33 1 10 1.130 0.70 0.806 7 24.6 15 33 1 10 1.765 1.09 0.330 7 24.6 18 27 1 10 3.107 1.92 0.106 8 28.1 15 36 1 10 1.417 1.00 0.449 8 28.1 18 33 1 10 2.225 1.57 0.181 9 31.6 18 39 1 10 1.675 1.33 0.285 10 35.1 24 39 1 10 2.680 2.37 0.100 table.14 boost - type, fosc=300khz, iled=0.5a, S il=0.4a n umber of led serial connection vout (v) vin (v) inductance l ( h) co total capacitance ( f) co total esr (m ) fc (khz) rs (k ) cs ( f) 2 7.1 5 15 4.7 10 1.495 1.25 0.339 3 10.6 5 22 4.7 10 0.683 0.86 1.090 3 10.6 7 20 4.7 10 1.472 1.84 0.234 4 14.1 7 33 4.7 10 0.671 1.12 0.849 4 14.1 9 27 4.7 10 1.355 2.26 0.208 5 17.6 12 33 4.7 10 1.579 3.29 0.122 6 21.1 12 43 4.7 10 1.011 2.52 0.249 6 21.1 15 36 4.7 10 1.887 4.71 0.071 7 24.6 12 51 4.7 10 0.731 2.13 0.409 7 24.6 15 51 4.7 10 1.142 3.32 0.167 7 24.6 18 43 4.7 10 1.951 5.67 0.057 8 28.1 15 62 4.7 10 0.823 2.73 0.283 8 28.1 18 56 4.7 10 1.311 4.36 0.111 9 31.6 18 68 4.7 10 0.96 3.59 0.184 10 35.1 24 68 4.7 10 1.537 6.38 0.064 table.15 boost - type, fosc=100khz, iled=0.5a, S il=0.4a n umber of led serial connection vout (v) vin (v) inductance l ( h) co total capacitance ( f) co total esr (m ) fc (khz) rs (k ) cs ( f) 2 7.1 5 39 10 10 0.575 1.03 1.078 3 10.6 5 68 10 10 0.221 0.59 4.895 lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 24 3 10.6 7 62 10 10 0.475 1.27 1.059 4 14.1 7 91 10 10 0.243 0.86 3.035 4 14.1 9 82 10 10 0.446 1.58 0.902 5 17.6 12 100 10 10 0.521 2.31 0.529 6 21.1 12 150 10 10 0.290 1.54 1.429 6 21.1 15 120 10 10 0.566 3.00 0.374 7 24.6 12 180 10 10 0.207 1.28 2.399 7 24.6 15 150 10 10 0.388 2.40 0.682 7 24.6 18 120 10 10 0.699 4.33 0.210 8 28.1 15 180 10 10 0.283 2.00 1.122 8 28.1 18 180 10 10 0.408 2.88 0.541 9 31.6 18 200 10 10 0.327 2.6 0.751 10 35.1 24 200 10 10 0.523 4.61 0.264 * in thebuckboost - type, relations between duty d and the movement mode are as the following. d 0.5 boost mode d 0.5 buck mode referring to the table10 C the table 1 5 , adjust compensation value in accordance with the condition of the use, under the actual movement . lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 25 8.10 led cross - connection protection function with the application when each - string of led - assy is driven by using LC5710S for the plural , a gainst the nor mal connection of the fig20 - 1, b y mis - wiring of the connector part which connects harness to led - assy and so on, it may become a connection like a fig20 - 2. this is prescribed as cross - connection . led cross - connection protection function is built in the LC5710S to avoid the saturation of inductor and the damage, by the heat - generation when the over - load condition with cross - connection . in the LC5710S, in case of the above - mentioned cross - connection , the w atch - dog - timer (30msec : t yp) watches the decline of v cs (csp - csn voltage) and rise in the comp terminal voltage. when the same condition goes on beyond 30msec, movement of LC5710S becomes the burst - mode, and it is possible that the heat - generation is restrained. when it is seen from LC5710S, bec ause cross - connection is the persistently abnormal condition of the peripheral circuit. even if cross - conne ction protection activates as well as the thermal protection , a stress may be given to the peripheral part and ic itself, and so on. this condition isn ? t assured for a long time because a user recognizes mis - wiring and it is the protection which is the simple target until wiring is amended. be careful. fig.20 - 1 the normal conne ction of led fig.20 - 2 mis - wiring ( cross - connection) lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 26 8.11 peripheral parts design take care to use properly rated and proper type of components. the following circuit symbols refer to 6 . typical application circuit . i n page.9. ? inductor l this is a choke coil for smoothing led current. when the 26 illimeter is larger, the output ripple current is smaller, and the current stability is improved. in actual operation, it should be considered so that the coil is not saturated by the peak of ripple current. if the coil is saturated, the surge current beyond expectations flows . thus led, ic and peripheral circuit will be damaged. ? diode d s this is a free - wheel diode for buck converter , and this is a boost diode for boost and buck - boost converter . for diode selection, the w ithstanding voltage and the recovery time ( t rr ) are important. in case that diode with a long t rr is used, the large surge current flows into power mosfet w hen power mosfet turns on. thus, it may cause noise increasing, malfunction and efficiency decreasin g. it is recommended to choose from schottky barrier diode and u ltra - fast diode according to the withstanding voltage. ? current detection resistor r cs if the current detection resistor with high inductance is used, it may cause malfunctioning because of the high frequency current flowing through it. it is recommended to choose a low equivalent series inductance and high surge tolerant type for the current detection resistor. ? input capacitor c in this is a smoothing capacitor for main power supply. when the capacitance is larger , the ripple voltage is smaller . it is recommended to choose the capacitance according to the output power because the ripple voltage becomes bigger when the output power increase s even if the same capacitance. ? output capac itor c out b y the ipple current specification of led string , i t is recommended to determine whether c out i s needed or not, or to determine the capacitance value. if large ripple current can be set , the inductance of l can be smaller, the c out capacitance c an be smaller or the c out can be removed. thus, the power supply will be downsized and reduced the cost. if the small ripple current is set, the inductance of l is increased or c out is connected in parallel with led string. thus, the heat generation of led string, which is caused by ripple current variation , can be reduced . in addition, if led string is far from the output edge of power supply , c out is connect ed close to led string in parallel so that the ripple voltage and ripple current can be reduc ed . ? phase compensation network c p , c s , r s these are the phase compensation parts of a control - loop to connect to the comp terminal. connect the gnd side of the phase compensation parts to gnd pin of the ic at shortest wiring. when it is far from gnd of the ic, noise appears in the comp terminal by the influence such as parasitic - inductance of the pattern, and the faulty operation occurs often. be careful. ? setup resistor (r rt ) of oscillating frequency the oscillating - frequency of LC5710S is possible to adjust between 100khz and 500khz by the connection of r rt . connect the gnd side of the frequency - setup - resistor r rt to gnd pin of the ic at shortest wiring. this is to avoid the unstable movement of the ic b y the influence of the noise. lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 27 8.12 reference design example 4) buck - type (b) boost - type i buckboost - type * the above reference design example is only a guide. decide the fixed - number on your circuit board after you confirm a movement in the actual working,experiment adjustment. f ig.21 (a) C (c) reference design example fosc=300khz iled=500ma inductor ripple current S il=0.4a number of led=5leds(vout=17.6v) vin=24v vsw=24v cout(esr)=10m /ceramics capacitor cp(c4) open * sjpb - l6 being used as the d1 is manufactured by "sanken - electric co". fosc=300khz iled=500ma inductor ripple current S il=0.4a number of led=7leds(vout=24.6v) vin=12v vsw=24.6v cout(esr)=10m / ceramics capacitor cp(c4) open * sjpb - l6 being used as the d1 is manufactured by "sanken - electric co". fosc=300khz iled=500ma inductor ripple current S il=0.4a number of led=5leds(vout=17.6v) vin=12v 18v vsw=29.6v 35.6v cout(esr)=10m / ceramics capacitor cp(c4) open * sjpb - l6 being used as the d1 is manufactured by "sanken - electric co". lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 28 9. e xample pattern layout for the LC5710S,the lc5711s and the lc5720s, the circuit board pattern of demonstration - board manufactured by our company is shown in the following. 9.1 pattern layout 9.1.1 foot print drawing for buck - type (parts mounting side) for buck - type(back side) for boost - type/buckboost - type (parts mounting side) for boost - type/buckboost - type(back side) fig.22 demo - board pattern layout fig.23 footprint drawing for LC5710S lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 29 9 .2 circuit diagram of demonstration - board 9.2.1 for buck - type *LC5710S / lc5720s : r5 and r6 must be open. jumper - j1 must be inserted. c7 and r7 are used only with LC5710S. 9.2.2 for boost - type and buckboost - type * the setup of jumper for boost - type: j1= insert, j2= open for buckboost - type: j1= open, j2= insert * c7 and r7 are used only with LC5710S. j1 j1 j2 fig.24 fig.25 lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 30 10. design considerations 10.1 trace and component layout design pcb circuit trace design and component layout affect ic functioning during operation. unless they are proper, malfunction, significant noise, and large power dissipation may occur. circuit loop traces flowing high frequency current, as shown in fig . 26 , should be designed as wide and short as possible to reduce trace impedance. in addition, earth ground traces affect radiation noise, and thusshould be designed as wide and short as possible. switching mode power supplies consi st of current traces with high frequency and high voltage, and thus trace design and component layout should be done in compliance with all safety guidelines. furthermore, because an integrated power mosfet is being used as the switching device, take accou nt of the positive thermal coeffic ient of r ds( on ) for thermal design. f ig. 26 shows practical tra ce design examples and consider ations. in addition, observe the following: ic peripheral circuit (1) main circuit traces main circuit traces carry the switching current; therefore, widen and shorten them as much as possible. the loop formed with c in , vin pin, an d gnd pin should be small in order to reduce the inductances of the traces against high frequency current. 1) traces around gnd pin main circuit gnd and control circuit gnd should be connected to the vicinity of gnd pin with dedicated traces respectively, in order to avoid interference of the switching current with the control circuit. 1) traces around the current detection resistor, r cs the traces of r cs should be connected to csp pin and csn pin with dedicated traces respectively, in order to reduce noises wh en the current is detected. when the noise between csp and csn is high, a filter capacitor cf can be added like a page9, sixth clauses - application circuit example ,too. (4)peripheral components the components for phase compensation such as c p , c s , r s should be connected close to comp pin and gnd pin. also, frequency - setup - resistor r rt should be connected close to rt pin and gnd pin. (5) when c out is used, it should be connected close to led string. * as for the gnd pattern, b e careful that rou tes f or the main - circuit (switching current flows) , and the routes for the small - signal don ? t become common impedance. fig.26 high frequency current loops hatched portion (a)buck - type (b)boost - type (c)buckboost - type lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 31 5) buck - type (b) boost - type i b uckboost - type fig.27 the trace of the pattern if it is possible,in each type,the gnd for main - circut and the gnd for small - signal should be separated as the starting point to the gnd pin of the ic. it is recommended to separate the gnd of "dimming - signal" and gnd of "main - circuit",too. * a bold line is a main - circuit. lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 32 11. typical characteristics (ta=25 ) 11.1 efficiency fig.2 8 - 1 buck - mode i led =1.0a l=220uh f osc =100khz fig.2 8 - 2 buck - mode i led =1.0a l= 47 uh f osc = 5 00khz fig.2 8 - 3 buck - mode i led =0.5a l=220 uh f osc =100khz lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 33 fig.2 8 - 4 buck - mode i led =0.5a l=47uh f osc =500khz fig.2 8 - 5 boost - mode i led =0.5a l=100uh f osc =100khz fig.2 8 - 6 boost - mode i led =0.5a l=22uh f osc =500khz lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 34 11.2 uvlo (under voltage lock out) stop startup fig.2 8 - 7 buckboost - mode i led =0.5a l=100uh f osc =100khz fig.2 8 - 8 buckboost - mode i led =0.5a l=22uh f osc =500khz fig.2 8 - 9 buck - mode 5leds i led =0.5a uvlo lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 35 11.3 switching frequency settings 11.4 digital dimming characteristics 11.5 analogue dimming characteristics fig.2 8 - 10 r rt resistance vs. switching frequency fig.2 8 - 11 dimming frequency=1khz, duty vs. i led fig.2 8 - 12 dim v oltage v dim vs. i led lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 36 11.6 cs threshould voltage temperature characteristics 11.7 cs threshould voltage v in regulation (5leds) 11.8 tsd (thermal shut down ) normal restart shut down fig.2 8 - 13 v cs vs. ta fig.2 8 - 14 v cs vs. v in fig.2 8 - 15 v cs vs. ta at tsd(v in =24v,5leds, i led =10ma) lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 37 11.9 supply current i in(on) 11.10supply current i in(off) 11.11 waveform of digital dimming (1khz duty=5%) v dim v sw i led fig.2 8 - 16 i in(on) vs. v in (r dim =120k) fig.2 8 - 17 input supply current i in(off) vs. v in (v dim =0v) fig.2 8 - 18 pwm dimming duty=5%,v dim ,v sw ,i led (1khz) v dim 2v/div v sw 10v/div i led 500ma/div time 1msec/div lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 38 11. 12 waveform of digital dimming (1khz duty=5%) 11.13 steady state operation buck - mode v in =30v,5leds,fosc=100khz 11.14 steady state operation buck - mode v in =30v,5leds,fosc=500khz v dim v sw i led fig.2 8 - 19 pwm dimming duty=50%,v dim ,v sw ,i led (1khz) v dim 2v/div v sw 10v/div i led 500ma/div time 1msec/div fig.28 - 20 buck - mode ch1 v sw 20v/div ch2 v in 10v/div ch4 i led 200ma/div time 5 s/div fig.28 - 21 buck - mode ch1 v sw 20v/div ch2 v in 10v/div ch4 i led 200ma/div time 5 s/div i led v sw v in i led v sw v in lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 39 11.15 steady state operation boost - mode v in =15v,5leds,fosc=100khz 11.16 steady state operation boost - mode v in =15v,5leds,fosc=500khz 11.17 steady state operation buck - boost - mode v in =20v,5leds,fosc=100khz fig.28 - 22 boost - mode ch1 v sw 10v/div ch2 v in 10v/div ch4 i led 200ma/div time 5 s/div fig.28 - 23 boost - mode ch1 v sw 10v/div ch2 v in 10v/div ch4 i led 200ma/div time 5 s/div fig.28 - 24 buck - boost - mode ch1 v sw 10v/div ch2 v in 10v/div ch4 i led 200ma/div time 5 s/div i led v sw v in i led v sw v in i led v sw v in lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 40 11.18 steady state operation buck - boost - mode v in =20v,5leds,fosc=500khz fig.28 - 25 buck - boost - mode ch1 v sw 10v/div ch2 v in 10v/div ch4 i led 200ma/div time 5 s/div i led v sw v in lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 41 12. packing specifications 12.1 taping & reel outline notes: 1 ) all dimensions in 41 illimeters 2 ) surface resistance under 10 9 3) drawing is not to scale notes: 1) all dimensions in millimeters 2) drawing is not to scale. eiaj no.rrm - 12dc quantity 4000pcs 0.8 0. 2 2 1 13.5 0. 5 17.5 1.0 lc 5710 s data sheet rev. 1.9 copy right: sanken electric co., ltd. page. 42 important notes all data, illustrations, graphs, tables and any other information included in this document as to sanken s products listed herein (the sanken products ) are current as of the date this document is issued. all contents in this document are subject to any change without notice due to improvement, etc. please make sure that the contents set forth in this document reflect the latest revisions before use. the sanken products are intended for use as components of general purpose electronic equipment or apparatus (such as home appliances, office equipment, telecommunication equipment, measuring equipment, etc.). prior to use of the sanken products, please pu t your signature, or affix your name and seal, on the specification documents of the sanken products and return them to sanken. if considering use of the sanken products for any applications that require higher reliability (transportation equipment and its control systems, traffic signal control systems or equipment, disaster/crime alarm systems, various safety devices, etc.), you must contact a sanken sal es representative to discuss the suitability of such use and put your signature, or affix your name and seal, on the specification documents of the sanken products and return them to sanken, prior to the use of the sanken products. any use of the sanken pr oducts without the prior written consent of sanken in any applications where extremely high reliability is required (aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited. in the event of using the sanken p roducts by either (i) combining other products or materials therewith or (ii) physically, chemically or otherwise processing or treating the same, you must duly consider all possible risks that may result from all such us es in advance and proceed therewith at your own responsibility. although sanken is making efforts to enhance the quality and reliability of its products, it is impossible to completely avoid the occurrence of any failure or defect in semiconductor products at a certain rate. you must take, at your own responsibility, preventative measures including using a sufficient safety design and confirming safety of any equipment or systems in/for which the sanken products are used, upon due consideration of a failure occurrence rate or derating, etc. , in order not to cause any human injury or death, fire accident or social harm which may result from any failure or malfunction of the sanken products. please refer to the relevant specification documents and sanken?s official website in relation to derat ing. no anti - radioactive ray design has been adopted for the sanken products. no contents in this document can be transcribed or copied without sanken s prior written consent. the circuit constant, operation examples, circuit examples, pattern layout examples, design examples, recommended examples and evaluation results based thereon, etc., described in this document are presented for the sole purpose of reference of use of the sanken products and sanken assumes no responsibility whatsoever for any and all damages and losses that may be suffered by you, users or any third party, or any possible infringement of any and all property rights including intellectual property rights and any other rights of you, users or any third party, resulting from the fore going. all technical information described in this document (the technical information ) is presented for the sole purpose of reference of use of the sanken products and no license, express, implied or otherwise, is granted hereby under any intellectual propert y rights or any other rights of sanken. unless otherwise agreed in writing between sanken and you, sanken makes no warranty of any kind, whether express or implied, as to the quality of the sanken products (including the merchantability, or fitness for a particular purpose or a special environm ent thereof), and any information contained in this document (including its accuracy, usefulness, or reliability). in the event of using the sanken products, you must use the same after carefully examining al l applicable environmental laws and regulations that regulate the inclusion or use of any particular controlled substances, including, but not limited to, the eu rohs directive, so as to be in strict compliance with such applicable laws and regulations. y ou must not use the sanken products or the technical information for the purpose of any military applications or use, including but not limited to the development of weapons of mass destruction. in the event of exporting the sanken products or the techni ca l information, or providing them for non - residents, you must comply with all applicable export control laws and regulations in each country including the u.s. export administration regulations (ear) and the foreign exchange and foreign trade act of japan, and follow the procedures required by such applicable laws and regulations. sanken assumes no responsibility for any troubles, which may occur during the transportation of the sanken products including the falling thereof, out of sanken s distribution net work. although sanken has prepared this document with its due care to pursue the accuracy thereof, sanken does not warrant that it is error free and sanken assumes no liability whatsoever for any and all damages and losses which may be suffered by you res ulting from any possible errors or omissions in connection with the contents included herein. please refer to the relevant specification documents in relation to particular precautions when using the sanken products, and refer to our official website in r elation to general instructions and directions for using the sanken products. |
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