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Visitor II
June 11, 2026
Question

PWM Generator configuration in ST motor control workbench

  • June 11, 2026
  • 1 reply
  • 23 views


Most of the default settings on the ST workbench for the Charge Boot Capacitor Time are 10ms. However, with the B-G431B-ESC1 Discovery kit with STM32G431CB MCU, calculations show that the charging time for a 1-microfarad capacitor should not exceed 10 microseconds. So why is the default setting 10ms?

1 reply

GMA
ST Technical Moderator
June 12, 2026

Hello ​@Nguyen Hoc Vuong,

The charge boot capacitor time is set to 10 ms by default in the Workbench, regardless of the hardware that is used.
It can be reduced to 1 ms.
For more details about the charge boot capacitor feature, see the AN5789 application note.
 

If you agree with the answer, please accept it by clicking on 'Best answer'.Best regards.GMA