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DRV8301: About bootstrap capacitor

Hiroyasu Matsubara
Expert 1405 points
Part Number: DRV8301
Other Parts Discussed in Thread: DRV8300

Hello,

I would like to ask about bootstrap capacitor selection with Drv8301 .

On Drv8301 EVM kit board, 0.1uF bootstrap capacitor is used on the board.

I wonder if we should change the bootstrap capacitor value or not ,when we increase the Pwm frequency.

For example,if I use the Pwm into the Drv8301 at 80kHz, we should use the bootstrap capacitor value lower than 0.1uF or not ?

Regards,

Hiroyasu Matsubara