 True buck-boost bootstrap question
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Storken
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Thu Jul 12 2012, 12:20PM
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Registered Member #1960
Joined: Thu Feb 05 2009, 11:57PM
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Posts: 48
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Hello, I'm working on a true buck boost converter. I tried simplifying some of my drawing so that it would be easier to understand. The original schematic includes a 3-ph mosfet driver with bootstrapping circuitry, so I hope you still understand what I'm trying to achieve.
Basically, it seems that the bootstrap charging path needs to go through the main inductor, does this pose a problem for operation?
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colin
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Registered Member #7130
Joined: Tue Oct 09 2012, 03:08PM
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Posts: 1
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Hi
Input Rail should go through Inductor at first instance. This will charge the inductor. At second instance when mosfet switches the circuit to the out put then load should be connected through capacitor. Means when inductor is charging capacitor is supplying power to the load and then Inductor supplies power to the load then capacitor must be charging. Shortly ; Replace L1 with D2.
electronic assembly
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