I have design and simulated a full bridge DC to DC converter. During the implementation, I have problem turning off my high side mosfet.I am driving my mosfet using mosfet driver IR2101. For the bootstrap capacitor, I used 4.7uF and the diode is an ultra fast recovery diode BYV27-100. Intially, I suspect the problem arise from the gate driver, I did some off line testing with the gate driver. I use the High side output to drive a single MOSFET with a resistor connected at the source and feedback the source voltage to Vs pin of the IR2101 driver. The MOSFET is able to turn on and off perfectly.I move on the test with two mosfet and the high side mosfet is unable to turn off again. May I know is there something that I have left out that has caused this problem.Any help is greatly appreciated.All testing schematic are attached below in the pdf file schematic.
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