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NexFET™ Power MOSFETs
NexFET™ Power MOSFETs Forum
half bridge control using ucc 27201
i am trying to control a half bridge using ucc27201
i am succesful in contorlling the lower mosfet but i am unable to control the upper mosfet
i have connected a 0.1uf ceramic capacitance between HB and HS.
does the bootstrap function not ocuur properly due to this capacitor
do I need TO change capacitor if my operating PWM frequency is 32KHz
or is there some other problem
Did you have any luck solving this problem?
I'm also having issues with the high side not driving properly. I also think it is due to the bootstrap not functioning properly.
I'm driving IRFS3107 Mosfets.
Here's the schematic (note: the mosfets have been changed. I'm actually using the IRFS3107)
The battery voltage is 28Vdc, the inputs to the mosfet driver are 0-5V dc signals from a microcontroller (not pwm).
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