MAX684 charge-pump drive white light LED circuit

Published:2011/7/13 21:02:00 Author:leo | Keyword: Charge-pump, white light LED | From:SeekIC

MAX684 charge-pump drive white light LED circuit is like what the picture shows. Its work voltage is from 2.7 V to 4.21 V and can output 5 V voltage and 50mA current. It does not need shielded inductor and just need a resistance and three capacitors. If the practical need is more than three white light LEDs, it can take MAX683 and MAX682 which can offer separately 100mA and 250 mA output current. Especially, the MAX683 can drive more than 16 white light LED which are par ally connected.



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