Hi there,
I'm using the DRV8307 to drive a 24V rated BLDC motor. I was able to drive it using the DRV8307EVM but i'm having some issues when trying to drive the same motor on my board.
Below is the schematic:
You can't see it on the schematic but LOCKn, FAULTn and HALLOUT are all pulled up to 3.3V (same rail as my MCU)
The red line represents a fly wire to connect VREG to the hall sensors.
When i PWM the driver i see a the FAULTn pin gets asserted and deasserted as shown below. I'm not sure what fault condition is actually being flagged. I probed the charge pump VCP pin and it shows 34.5V. There is no temperature rise, no rotor lockup (i can turn the motor shaft pretty easily)
Any thoughts ?????
Screen capture of the FAULTn pin
