RobG
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NiceFeng wrote on Apr 12th, 2009, 5:11am:hdqkwr wrote on Feb 28th, 2009, 1:17am:Hi,all: In a charge pump DC-DC converter, how to make a soft-start in it?As in start up time, there is large inrush current exist in charge pump.I want to get some way to suppress it, is there any reference or any suggestion? Hi,hdqkwr, During start-up period, you could operate some of the power switches as current source, which means connected the gate voltage to a biasing voltage instead of Vdd/GND. Feng This is easy to do... see Fig. 12 of Gregoire, "A compact switched-capacitor regulated charge pump power supply," JSSC, Aug 2006, 1944-1953
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