Dear Expert
Good day!
Our customer want to test the driver signal , so they set the test condition below:
1.Do not connect the Motor
2.Short the Rsense to GND.
3.Supply the Hall signal external ,
They found that , the faultn will active low immediately when PWM is supply , it will last 5ms low then recover 5us high ,move in circles. I had check the datasheet , only OC/OT /rotor stall will let the faultn pin active .
I had confirm with the customer .
1.it does not looks like rotor stall , if we do not supply the Hall signal , the Faultn will wait 3s , if we supply the hall signal ,it will become low immediately .
2.it does not looks like OT , because the device never active .
3.it does not looks like OC , because the Vsense pin is set to short to GND .
So could you help me to confirm , is there any other reasons could cause the Faultn pin active ?
Best regards
Leon.liu