Hi user4705198,
Is monitoring the mv voltage the chip's vm pin?
>> Please monitor the VM pin at the DRV8701 with respect to the GND pin at the DRV8701. Another area to monitor is the SHx pin with respect to the GND pin of the device.
If so, can I configure a simple constant voltage (about 30V) circuit on the VM pin to avoid high voltage on the VM pin?
>> Possibly, it depends on how you create the circuit.
I understand that this is not related to the difference in MOSFET supply voltage.
We are working to reduce spikes on the motor side for the anode spikes on the SHx pin.
Our circuit is GH, the resistance to GL path is 0 ohm.
However, a small overshoot occurs when the MOSFET is turned on and off.
This appears as noise on the supply power of the entire circuit.
Is monitoring the mv voltage the chip's vm pin?
>> Please monitor the VM pin at the DRV8701 with respect to the GND pin at the DRV8701. Another area to monitor is the SHx pin with respect to the GND pin of the device.
If so, can I configure a simple constant voltage (about 30V) circuit on the VM pin to avoid high voltage on the VM pin?
>> Possibly, it depends on how you create the circuit.
I understand that this is not related to the difference in MOSFET supply voltage.
We are working to reduce spikes on the motor side for the anode spikes on the SHx pin.
Our circuit is GH, the resistance to GL path is 0 ohm.
However, a small overshoot occurs when the MOSFET is turned on and off.
This appears as noise on the supply power of the entire circuit.