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DRV8412: DVDD and VDD power supply current

Toshihiro Watanabe
Genius 10235 points
Part Number: DRV8412

Hello,

In the datasheet, there is a condition which is GVDD = VDD = 12 V, fSw = 400 kHz and IVDD=10.5(typ) and IGVDD_x = 8mA/half_bridge.

I think 12V power supply current will be 42.5mA(typ). Is my understanding correct.

when switching frequency is 500kHz, IGVDD_x will be increased. Is it roughly ok that 500k/400k x 8mA = 10mA/half-bridge?

Best regards,

Toshihiro Watanabe

  • 0
    TI__Guru** 114905 points
    Hi Watanabe-san,

    In the datasheet, there is a condition which is GVDD = VDD = 12 V, fSw = 400 kHz and IVDD=10.5(typ) and IGVDD_x = 8mA/half_bridge.

    I think 12V power supply current will be 42.5mA(typ). Is my understanding correct.

    >>> Yes, your understanding is correct.

    when switching frequency is 500kHz, IGVDD_x will be increased. Is it roughly ok that 500k/400k x 8mA = 10mA/half-bridge?

    >>> Yes, this is a good approximation. Please note the power supply current recommendations of section 8.2.1.2.2 of the datasheet.
  • 0 in reply to Rick Duncan
    TI__Expert 8985 points
    Hi Watanabe-san,

    Did Rick's suggestion resolve your question?

    If so, please close this post by accepting the post is resolved in Rick's highlighted in yellow answer above me.

    Thanks!