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DRV8705S-Q1EVM: How do we change its switching frequency?

Part Number: DRV8705S-Q1EVM
Other Parts Discussed in Thread: MSP-FET

Hi team, 

Could you tell me how to change its switching frequency for DRV8705S-Q1EVM by GUI?

Also, does  DRV8705S-Q1 (not EVM) have switching frequency configuration? I would like to use 10kHz instead of 20kHz.

Regards,
Ochi

  • Ochi-san,

    Unfortunately, the switching frequency is fixed in firmware.  You would have to change the firmware for the EVM which would require a MSP-FET tool.  

    The easiest approach would be to remove the jumper resistors between the MCU and DRV8705 for the inputs.  This will allow you to use an external function generator to adjust the PWM frequency.  You can set your function generator to 10kHz and adjust duty cycle.  

    Regards,

    Ryan