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DRV8432: Question for DRV8432

Annie Liu
Genius 10295 points

Part Number: DRV8432

Hi Team,

The customer is experiencing below issue and needs your help.

How much power does the DRV8432 chip need for VDD and GVDD at the 12V used?

Thanks.

  • 0
    TI__Guru** 114905 points

    Hi Annie,

    Please refer to section 8.2.1.2.2 of the datasheet:

    "The DRV83x2 requires a 12-V power supply for GVDD and VDD pins. The total supply current is relatively low at room temperature (less than 50 mA), but the current could increase significantly when the device temperature goes too high (for example, above 125°C), especially at heavy load conditions due to substrate current collection by 12-V guard rings. TI recommends designing the 12-V power supply with a current capability at least 5-10% of the load current, and no less than 100 mA to assure the device performance across all temperature ranges."

    Example: If the DRV8432 is designed to operate at 14A continuous, the GVDD/VDD power supply should be rated at 1.4A.