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DRV8870: Motor does not work with external capacitor at OUT1 and OUT2

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Part Number: DRV8870

Hello support team,


My customer is going to use DRV8870 with external capacitor 1uF or 0.1uF at between OUT1 and OUT2 for noise filtering purpose. (Actually, this capacitor had existed since they used another motor driver IC in their system.) In this case, the DC moter sometimes does not work. But, the motor is no problem when the external capacitor is removed from OUT1 and OUT2.

1. Is there any restriction for the external capacitor at OUT1-OUT2 in this device?
2. If so, could you explain the mechanism of failure? Is the OCP deglitch time related?


Thank you for your support.


Regards,
Kaizawa


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