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DRV8718-Q1: DRV8718-Q1 VCP supply

Hale Tan
Expert 3320 points
Part Number: DRV8718-Q1
Other Parts Discussed in Thread: LM2903-Q1,

Hi team! 

The customer wanted to use DRV8718 VCP to supply for comparator LM2903-Q1. The VCP is about 22V and the comparator LM2903-Q1 electrical characteristics is as below. Is this acceptable?

  • 0
    TI__Mastermind 35745 points

    Hi,

    Thank you for your question.we will review your question and feedback to you within 24hours

    regards

    Shinya Morità

  • 0 in reply to Shinya Morita
    TI__Mastermind 35745 points

    Hi,

    Thank you for your questions. This question was posted at DRV8718-Q1. DRV8718-Q1 VCP output will be PVDD + up to 11V.  So as long as PVDD is lower than 11V, VCP will stay lower than 22V.

    If you have more questions related to LM2903-Q1, please post questions for LM2903-Q1.

    regards

    Shinya Morita

  • 0
    Genius 5040 points

    Hi Hale,

    Hale Tan said:

    The customer wanted to use DRV8718 VCP to supply for comparator LM2903-Q1. The VCP is about 22V and the comparator LM2903-Q1 electrical characteristics is as below. Is this acceptable?

    It depends on the voltage on PVDD. What is the voltage on PVDD?

    If you say VCP is 22v, does this mean the PVDD is 11v?

    VCP = PVDD + 11V.

    VCP will have ripple every time the gate signals switching, so it is not a clean source for using as power supply to other components.

    Brian