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DRV8251: Retry While Using the Demo Board

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Part Number: DRV8251

Tool/software:

Hello,

We are using the DRV8251EVM to test a motor. When I lock the motor, I trigger the OCP but the chip goes into retry mode. 

As far as I know, the board has the DRV8251 and not the DRV8251A.

I modified the board to by-pass the microcontroller and I'm driving IN1 and IN2 with 3.3V and GND, respectively. I still get a retry from the chip.

the board still has the default 0.15 Ohms sense resistor.

When I drive the motor straight from a bench supply, locking the motor triggers the OC on the supply.

Is there a reason why the DRV8251 would behave that way?


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