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https://designers-guide.org/forum/YaBB.pl Design >> High-Power Design >> High Voltage Bus soft-start https://designers-guide.org/forum/YaBB.pl?num=1273781211 Message started by masa6614 on May 13th, 2010, 1:06pm |
Title: High Voltage Bus soft-start Post by masa6614 on May 13th, 2010, 1:06pm Hi, If I was trying to use provide a soft-start to a High Voltage bus, i was thinking of PWMing the bus FET and using an inductor to limit the inrush current while the Load's input Caps are charging. I couldnt find any mosfet or igbt gate driver chips that would stay on 100% duty cycle after the soft start, so was thinking of doing something like this pics. Does this seem like it'd work? Anyone know of a half-bridge IC that would work, and would also have the ability to switch on the high side permanently once i'm done with the soft-start? Or would i need to just turn off the chip completely, and provide control for another high side switch to keep the +315V at the bus FET gate? And im having no luck finding the 600 to low voltage DC converters. Thanks alot! |
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