Hello,
I want to control the driver thanks to Arduino and not Piccollo controler in my application.
I'm just starting and I want to see what's happened when I set a value on PWM_AH input.
But nothing happened.
The ground and PWM_AH is connected to the Arduino PWM.
The PVDD and ground to à 12V source.
Can you help me to understand how this driver works ?
Thank you.
Thomas
Hi Thomas,
DRV8301 works by applying PWM inputs to toggle gate driver outputs, which are used to switch external MOSFETs to control a BLDC motor.
For DRV8301 to work, the device needs to be in operating state, which is:
- PVDD must be powered above UVLO
- EN_GATE = high
Then applying PWMs to the inputs should toggle gate drive outputs according to the table depending on the mode you're using:
So INLA PWM (0 --> 3.3V) will toggle GLA PWM (0 --> GVDD).
Note this is a bootstrap architecture device so you will need to apply synchronous PWMs at the inputs (i.e. INHA & ~INLA) to refresh the bootstrap capacitor to provide high-side FET gate voltage (GHA).
Thanks,
Aaron
