Part Number: DRV8353
I test with an DRV8353 Evaluation Kit an an BLDC in freerun at 18V and approx. 6A nominal current in free run. The free run ist good. But if I stop the PWM Signal to the DRV8353 the Motor stop rotating immediately. After two or three times the DRV8353 is damaged. If I start PWM signal the fault LED is on and the motor don't start moving. It is a bad solution to stop PWM immediately?
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In reply to Adam Sidelsky:
sorry I can't, because the IC is damaged. It is possible, when I turn off the PWM then all MOSFET are "closed". But in the motor is some rest voltage. Can this voltage flow back to GND over the IC and this damage the IC? It is recommended use brake before stop PWM that the energy can flow back to GND?
In reply to Peter Mirtschink:
I use 1x Mode and PWM with 1 kHz or 20 kHz. I have two boards and booth are damaged with the same problem.
thank you very much. I will try to slow down PWM and use Brake in last steps only to be sure that there is no high voltage.
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