AAT3110 Charge-pump Driving White LED Circuit

Published:2011/7/13 7:40:00 Author:Michel | Keyword: Charge-pump Driving, White LED Circuit | From:SeekIC

Capacitance type charge-pump is divided into frequency doubling and fractional frequency according to its boost way.The efficiency of the frequency doubling charge-pump is about 90% and the efficiency of fractional frequency charge-pump is 93％～95％.Capacitive charge-pump is divided into constant voltage output and constant current output according to the output.According to the driving LED way,it is divided into LED parallel constant voltage drive, single constant current driver, series constant current driver etc.Inductive booster device is constant current output, the output voltage is higher and it drives LED in series way.The charge-pump composed of AAT3310 is shown as the picture 1.This charge-pump uses output voltage power supply circuit in parallel manner with the features of few external circuit devices,simple walk line and high conversion efficiency.



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