unisonic technologies co., ltd uld3380 preliminary linear integrated circuit www.unisonic.com.tw 1 of 4 copyright ? 2014 unisonic technologies co., ltd qw-r109.034.c high efficienc y pwm buck led driver controller ? description the utc uld3380 is a pwm mode step-down converter. by well controlling the external mo sfet and regulating a constant output current. the output duty cycle of the utc uld3380 can be up to 100% for wider input voltage application. the utc uld3380 is available in a sot-26 package. ? features * universal input voltage range with off-line topology * programmable constant led current * output led string short protection * output led string open protection * dimmable led current by actl * ocp * built-in otp sot-26 4 5 3 2 1 6 ? ordering information ordering number package packing uld3380g-ag6-r sot-26 tape reel (1) r: tape reel (2) ag6: sot-26 (3) g: halogen free and lead free uld3380g-ag6-r (1)packing type (2)package type (3)green package ? marking 3380g 1 2 3 4 5 6
uld3380 preliminary linear integrated circuit unisonic technologies co., ltd 2 of 4 www.unisonic.com.tw qw-r109-034.b ? pin configurations ? pin description pin no. pin name description 1 v cc power supply 2 gnd ground of the chip. 3 gate gate driver for external mosfet switch. 4 actl analog dimming control. 5 vc compensation pin. 6 sense led current sense input pin. ? block diagram v cc sense vc actl gnd gate uvlo + - 17v/7.5v vccovp + - 35v cc + - vref + - current waveform modulation dimming function + - osc vcc ok internal bias & vref all blocks en driver stage r r s q
uld3380 preliminary linear integrated circuit unisonic technologies co., ltd 3 of 4 www.unisonic.com.tw qw-r109-034.b ? absolute maximum rating parameter symbol ratings unit supply input voltage v cc 40 v gate voltage v gate 14 v actl voltage (note 2) v actl 8 v vc voltage v vc 6 v sense voltage v sense -0.3~6 v power dissipation (t a =25c) p d 0.392 w junction temperature t j 150 c storage temperature t stg -65~+150 c notes: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 2. if the actl pin is connected with a serial 1m ? resistor, the maximum voltage can go up to 36v. ? recommended operating conditions (note) parameter symbol ratings unit supply input voltage v cc 17~32 v junction temperature range t j -40~125 c note: the device is not guaranteed to f unction outside its operating conditions. ? thermal data parameter symbol rating unit junction to ambient ja 255 c/w ? electrical characteristics (v cc =24v dc , t a =25c, unless otherwise specified) parameter symbol test conditions min typ max unit input start-up voltage v st 15 17 19 v minimum operation voltage after star t-up v in ( min ) 6.0 7.5 9.0 v input quiescent current i qc after start-up, v cc =24v 1.65 5.0 ma maximum startup current in v cc hiccup operation i st(max) maximum i cc at low end of v cc 250 300 a input shutdown current i shdn before start-up, v cc =15v 0.1 5.0 a over voltage protection v ovp vcc pin 32.5 35.5 36.5 v current sense voltage v sense 160 mv switching frequency f sw 38 47 55 khz oscillator maximum duty cycle d max v c =3v 100 % minimum turn-on time t on ( min ) 300 ns gate pin maximum voltage v gate no load at gate pin 11.1 12 13.1 v gate voltage high v gate_h i gate =-20ma 11 12 13 v i gate =-100 a 11.1 12 13.1 v gate voltage low v gate_l i gate =20ma 0.55 0.75 0.95 v i gate =100 a 0.3 0.5 0.7 v gate drive rise and fall time 1nf load at gate 75 ns gate drive source and sink peak current 1nf load at gate 0.2 a actl led dimming analog dimming actl pin input current i actl 25 a analog dimming range 0 1.3 v analog dimming threshold voltage high level 1.2 1.3 v low level 0 0.1 v vc threshold for pwm switch off v vc 1.1 1.25 1.4 v thermal protection thermal shutdown temperature t sd 150 c
uld3380 preliminary linear integrated circuit unisonic technologies co., ltd 4 of 4 www.unisonic.com.tw qw-r109-034.b ? typical application circuit c1 4.7 f r1 1m r2 511k 1 2 c3 4.7 f 1 2 c5 3.3nf 1 2 r3 10k 1 5 2 v cc vc gnd actl sense gate utc uld3380 c4 1nf 4 6 3 r6 22 d1 es2j r7 l2 680 h c6 1 2 47 f/50v + 1 led+ zd2 54v 1 led- r4 10 zd1 12v q1 d2 es1j 2 3 v in : 90 ~264v ac v out : 28v i out : 320ma 0.5 4n60 l1 1mh c2 4.7 f utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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