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DRV8840: maximum OCP current and OCP decision timing

KIM Andy
Expert 2530 points
Part Number: DRV8840

Hi

In the experiment, 3.3V was applied to V_REF of DRV8840.

OCP was not generated, and the output was normal up to about 6.7A.


(Question) What is the maximum OCP current and OCP decision timing of DRV8840 that we can use with confidence?

 

Regards

Andy

  • 0
    TI__Guru** 114905 points
    Hi Andy,

    The minimum OCP current and time is more important than the maximum OCP. An overcurrent event can occur is the current is >6A for longer than 3.75us (typical). Assuming the variation can be +/- 30%, the OCP could assert in as little as 2.6us.

    Although the device above did not trip overcurrent, the next device could due to process variation.