NJW4616 - 1 - ver.2013-09-24 123 524 constant current led driver with pwm control general description ? package outline features operating voltage range 2.5v to 40v recommended led drive voltage v led =40v(max.) led output current i led =300ma(max.) output current accuracy 2.0% to 11 of white led can be operated. (at led vf=3.4v) current consumption 450a typ. with pwm luminance control and on/off control internal over current protection circuit internal thermal shutdown circuit package sot-89-5 ? block diagram ? pin configration 1: en/pwm 2: gnd 3: r s 4: led 5: v dd * please note that this device is st ill under the development and therefore th e specifications are subject to change. NJW4616u2 (sot-89-5) the NJW4616 is a constant current led driver with pwm control. 45v resisting constant current co ntrol and pwm control circuit can be offered with small package. it can achieve luminance control multiple white or blue and red leds. it can contribute to the reli ability improvement of the system because it has an overcurrent protection and thermal shutdown circuit. control logic current limit tsd led ovp vref ( 0.2v ) gnd en/pwm r s v dd standby timer led
NJW4616 - 2 - ver.2013-09-24 absolute maximum ratings (ta=25 c) parameters symbol ratings unit vdd power supply v dd -0.3 to +45 v output voltage v led -0.3 to +45 v en/pwm pin voltage v enpwm -0.3 to +45 v power consumption p d 625 (*1) 2400 (*2) mw junction temperature tj -40 to +150 c operating temperature topr -40 to +105 c storage temperature tstg -40 to +150 c (*1): mounted on glass epoxy board. (76.2114.31. 6mm:based on eia/jdec standard, 2layers) (*2): mounted on glass epoxy board. (76.2114.3 1.6mm:based on eia/jdec standard, 4layers), internal cu area: 74.274.2mm recommended operating conditions (ta=25 c) parameters symbol conditions min typ max unit operating voltage v dd 2.5 - 40 v output current i led 20 - 300 ma output voltage v led - - 40 v ? electrical characteristics (unless otherwise noted, v dd =12v, v led =1.0v, r s =2 ? , v enpwm =v dd , ta=25 c) parameters symbol conditions min typ max unit quiescent current i dd - 340 550 a quiescent current at off state i dd_off v enpwm =gnd - - 0.1 a output current accuracy ? i led -2 - +2 % output pin leak current i leak v enpwm =gnd, v dd =40v, v led =40v - - 0.1 a off delay time t d_off 10 25 50 ms en/pwm pin on voltage1 v enpwm_on 1 v dd <5v, i led =off on 0.7v dd - v dd v en/pwm pin on voltage2 v enpwm_on 2 v dd 5v, i led =off on 3.5 - v dd v en/pwm pin off voltage v enpwm_off i led =on off 0 - 0.5 v en/pwm pin input current i enpwm - 7 - a rs pin leak current i out_rs led=open - 4 - a pwm pin on delay time t pwm_on v enpwm =l h, i led =off on, r s =0.62 ? - 10 - s pwm pin off delay time t pwm_off v enpwm =h l, i led =on off, r s =0.62 ? - 1.2 - s led short protection detect voltage v led_short r s = 0 ? , i led =i led max i led max 0.5 - 22 - v maximum output current i led_max r s =0 ? 330 600 - ma * please note that this device is st ill under the development and therefore th e specifications are subject to change.
NJW4616 - 3 - ver.2013-09-24 typical application the r s resistance setting formula: ) ( ) ( . ) ( a i v r led s 2 0 = ? * please note that this device is st ill under the development and therefore th e specifications are subject to change. control logic current limit tsd led ovp vref ( 0.2v ) gnd en/pwm r s v dd v dd /vled standby timer led
NJW4616 - 4 - ver.2013-09-24 memo [caution] the specifications on this databook are only given for information, without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
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