Part Number:DRV8307
Hello,
We designed a BLDC driver with DRV8307 for a 300W motor (18V, 15A). When I power-up the system fault pin is high for 60us and low for 5ms. This cycle is repeated continuously. From the datasheet it seems this is overcuurent fault but motor is taking only 290mA where it is supposed to take 3A, it is spinning with audible noise and having low torque. Voltage in ISENSE pin is 100mV, I also tried by gorunding ISENSE pin directly to ground still the problem persists.
Test conditions:
Vin - 18V
PWM duty cycle - Constant duty cycle (50% or 100%)
PWM always ON, motor is stopped/ started by pulling enable. Motor is run in no-load condition.
I have attached the DRV8307 part of my schematics. (Part number in the schematics will be DRV8308 please dont mind.)
