Part Number: DRV8305-Q1
Dear all.
We are working on a working sample with the same circuit as DRV8305-Q1EVM.
I have a question during testing.
The difference is that the power source A and the power source B are separated.
For power source A (12V), drop to 5V and 3.3V, and then 3.3V for MCU power
The 5V power supply is connected to the power supply of DRV8305 pull up resistor and Vref.
Power supply B (12V) is connected to PVDD of DRV8305 via power switch.
Questions)
The power source A is always on and the power source B is on / off so that the motor is driven according to the state of the power source B.
If power supply B is turned off through the power switch, PVDD becomes 5V-0.4V when pull-up and 5V is applied at Vref, and it is maintained at 3.3V-0.4V when 3.3V is applied.
I wonder if the voltage of Vref can affect PVDD.
Thanks.
