* this specifications are subject to be changed without notice ADT6051 dimmable constant current / constant voltage ic http://www.ad - tech.co.kr dec. 15. 2014 1 /4 figure 1. typical application circuit the adt 6051 is a constant current and constant voltage ic for stable led driving in a secondary side . this ic is suitable for applications that require power line isolation for safety and reliability, high conversion efficiency, as well as high led current accuracy . the adt 6051 contains 1 ) a constant current regulating amplifier with 300 mv threshold and within 1 % current accuracy ; 2 ) an vcc over voltage comparator to protect the ic when led string is open or broken ; 3 ) a pwm and analog dimming control for led lighting system ; 4 ) and a dc output pin for driving an opto - coupler or sourcing power for the other devices . the adt 6051 is offered in sop 8 package . dimmable cc / cv ic for led lighting ADT6051 general description features typical application circuit applications ? isolated led lighting ? dimmable led lighting ? secondary side led current regulation ? operating range up to 60v ? led current accuracy 1% ? analog dimming control ? pwm dimming control ? dc 5v output ? dc 5v output short protection ? vcc over voltage protection ? over temperature protection ? sop8 package ADT6051 adt6011 gd q1 comp inv ac ? led vcc pwm adim vsen isen gnd dc5v out ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
* this specifications are subject to be changed without notice ADT6051 dimmable constant current / constant voltage ic http://www.ad - tech.co.kr dec. 15. 2014 2 /4 1 2 3 4 isen out adim dc5v pwm vsen ADT6051 gnd vcc 8 7 6 5 simplified block diagram pin no. pin name description 1 isen constant current control input. 2 adim analog dimming input. 3 pwm pwm dimming input. 4 gnd ground. 5 vcc supply voltage input. 6 vsen constant voltage control input 7 dc5v 5v ldo output 8 out open - drain output. connects this pin to opto - coupler. ? 1v 0.3v otp 5v regulator ? pwm adim ? ? ? ? ? ? ? ? isen vsen vcc dc5v out gnd ? 5v 600kohm ? ? ? 100kohm 150kohm ? ? ? ? dimming control pin configuration 1v ? vccovp
* this specifications are subject to be changed without notice ADT6051 dimmable constant current / constant voltage ic http://www.ad - tech.co.kr dec. 15. 2014 3 /4 absolute maximum ratings ( note1 ) note1. stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. note2. measured on jesd51 - 7, 4 - layer pcb electrical characteristics (vcc = 15v, ta=25 c , unless otherwise specified ) parameter symbol rating units ground voltage gnd - 0.3 v power voltage vcc - 0.3 ~ 60 v open drain output out - 0.3 ~ 60 v all other pins dc5v, vsen, isen, pwm, adim - 0.3 ~ 6 v junction temperature t j - 40 ~ 150 storage temperature t stg - 65 ~ 150 thermal resistance (note2) ja 150 /w parameter conditions symbol min. typ. max. units device supply power supply operating range v cc 8 15 55 v vcc ovp vccovp 55 58.5 - v led off vcc v(adim)=0v vcc ledoff 8.5 10 11.5 v vcc quiescent current v(isen)=v(vsen)=0v i cc - 0.5 1.0 ma pwm dimming pwm input high level v pwmh 1.5 - - v pwm input low level v pwml - - 0.8 v pwm dimming frequency f pwm 0.1 - 100 khz pwm duty range d pwm 10 - 100 % threshold duty (led off) (note3) d off 3.7 6.7 9.7 % threshold duty (led on) (note3) d on 7 10 13 % p ull up current v(pwm)=0v i pullup - 9 15 ua analog dimming analog dimming input voltage v adim 0.1 - 1.0 v threshold voltage (led off) v off 37 67 97 mv threshold voltage (led on) v on 70 100 130 mv pin input current v(adim)=1v i adim - 3 0 3 ua current control loop transconductance , sink current only (note3) gm isen - 9.5 - v/a current sensing reference voltage i(out)=100ua v isen 297 300 303 mv pin input current v(isen)=5v i isen - 1 0 1 ua voltage control loop transconductance , sink current only (note3) gm vsen - 5.2 - v/a voltage sensing reference voltage i(out)=100ua v vsen 0.95 1.00 1.05 v pin input current v(vsen)=5v i vsen - 1 0 1 ua output stage lower output voltage, sink current only i(out)=1ma, v(isen)=1v v ol - 0.7 1.1 v output short circuit current. v(out)=5v, v(isen)=1v i outmax 3 6 10 ma dc 5v output dc 5v output voltage i(dc5v)=5ma v dc5v 4.5 5.0 5.5 v output short circuit current. v(dc5v)=0v i dc5vmax 8 16 24 ma temperature protection over temperature protection (note3) otp - 150 - otp hysteresis (note3) otp hys - 40 - note 3 : the parameter is guaranteed by design. it is not tested in production.
* this specifications are subject to be changed without notice ADT6051 dimmable constant current / constant voltage ic http://www.ad - tech.co.kr dec. 15. 2014 4 /4 package dimenstion
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