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DRV8846EVM: Step motor heating up with motor stopped

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Part Number:DRV8846EVM

Hi, guys

I'm testing the drv8846evm to develop a custom board, I'm running into an issue, when the motor is turning he is warm, which is fine, but when I stopped the motor by nENBL = HIGH, and the H-Bridge still active because I need the axis to stay in the same place, the voltage across the motor goes twice the voltage of moving, and he is heating up a lot, I can't even touch. 

How can I control that?

Thank you


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