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DRV8872-Q1: driver output waveforms

Dongbao Zhou
Expert 4070 points
Part Number: DRV8872-Q1

Hi team,

Can you help explain why there is a step highlighted below? Thanks.

  • 0
    TI__Prodigy 460 points

    Hi Dongbao, 

    The highlighted step occurs when both IN1 and IN2 = 0 and the bridge enters Hi-Z. When the bridge enters Hi-Z, the outputs are floating and can be at any voltage between -0.7V and VM +0.7V. In this case, OUT1 floated to 5V and remained there until the outputs were re-enabled. This is expected behavior when the bridge enters Hi-Z mode. 

    Thanks, 

    Madison Eaker

    Motor Drivers