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DRV8860: OCP reason dicuss

Part Number: DRV8860

Tool/software:

Hi TIer

My customer use DRV8860 to drive the Valve .

We parallel  4 output in one chip and to drive this valve.

because valve only 3ohm and 24V/12V support so we need choose PWM method to control the valve.

but we also get OCP signal  in this 4 output pin.

We think this is un-nomal fault, because when we use 100ohm resistance to replace the valve , it also get OCP.

we use DRV8860PW. 

Do you have some good suggestion?

Thank you very much.