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DRV8837: Vcc powr supply using 1.8+/-3% DC/DC

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Replies: 2

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Part Number: DRV8837

Hello team,

Customer want to use system 1.8V DC/DC to provide power supply to DRV8837 Vcc. the accuracy of the DC/DC is 1.8V+/-3%, I see in our datasheet the Vcc recommend is min 1.8V, so does this supply workable for DRV8837?

Best Regards,

Will

  • Hi Will,

    1.8V is not working with the -3% tolerance.

    Please note the UVLO rising specification in the Electrical Characteristics that states 1.8V is needed to exit.

    At 1.8 - 3%, the device may remain in undervoltage lockout.

    Even if the device exits undervoltage, small spikes on VCC to 1.7V may cause the device to enter undervoltage lockout. 

    Best Regards,
    Rick Duncan
    Motor Applications Team

  • In reply to Rick Duncan:

    Thanks Duncan, this helps solve my question.

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