unisonic technologies co., ltd UC3501 preliminary cmos ic www.unisonic.com.tw 1 of 4 copyright ? 2014 unisonic technologies co., ltd qw-r502-a63.b high efficient, low cost flashlight led drive ? description utc UC3501 is flashlight asic chip, using lsi technology, specifically designed for single dry battery, plus 1 of inductors, may constitute a drive circuit for led flashlights. ? features * high efficiency:85%~90% * low cost * simply add-ins one inductor ? ordering information order number package pin assignment packing lead free halogen free 1 2 3 UC3501l-t92-b UC3501g-t92-b to-92 o d g tape box UC3501l-t92-k UC3501g-t92-k to-92 o d g bulk note: pin assignment: g: gnd d: v dd o: out ? marking information package marking to-92 utc UC3501 1 data code l: lead free g: halogen free
UC3501 preliminary cmos ic unisonic technologies co., ltd 2 of 4 www.unisonic.com.tw qw-r502-a63.b ? block diagram v ref error amplifier v dd oscillator vi x limiter vfm control v out gnd
UC3501 preliminary cmos ic unisonic technologies co., ltd 3 of 4 www.unisonic.com.tw qw-r502-a63.b ? absolute maximum rating parameter symbol ratings unit input voltage v in 6 v output current i out 150 ma operating junction temperature t j -40~85 c storage temperature t stg -55~150 c note: absolute maximum ratings are those values be yond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? electrical characteristics (t a =25c) parameter symbol test conditions min typ max unit supply voltage v dd 0.9 5.0 v start voltage v start 0.9 v output current i out 100 ma oscillator frequency f osc 100 khz efficiency 85 %
UC3501 preliminary cmos ic unisonic technologies co., ltd 4 of 4 www.unisonic.com.tw qw-r502-a63.b ? typical application circuit v in gnd v out utc UC3501 2 3 1 47h l1 led r1 10 l2 led r2 10 l3 led r3 10 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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