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DRV8833C: DRV8833C input and output problems

Annie Liu
Genius 10295 points
Part Number: DRV8833C

Hi Team,

When using the DRV8833C, use MCU to control IO, and output to AIN1 and AIN2. AIN1 is a PWM wave (50Khz frequency, 50% duty cycle), and AIN2 is 0V. Test with a multimeter, the waveform between AIN1 and AIN2 is correct.

However, measuring the AOUT1 and AOUT2 waveforms, 1s has a PWM wave, 1s is 0, and the loop displays.

The customer wants to know why the waveform between AOUT1 and AOUT2 is not a continuous PWM waveform?

Thanks.

  • 0
    TI__Guru** 114905 points

    Hi Annie,

    Please see Table 1 of the datasheet.

    AOUT1 is toggling between H and Z. AOUT2 is toggling between low and Z.

    When PWM'ing one input and holding the other input high or low, only one output should PWM.