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UCC5870-Q1: VGTH read back

[FAE] Andrew Wang
Genius 10685 points
Part Number: UCC5870-Q1

Hi Team,

Customer found 2 different formula for calculating VGTH.

Which one customer should be using, thanks!

Andrew

VGTH = VADCDATA8 × 8

VGTH = DATA_OUTH(decimal) × 3.519mV

  • 0
    TI__Expert 4070 points

    Hi Andrew,

    Thanks for reaching out!  Our expert should get back to you tomorrow.

    Thanks,

    Aaron

  • 0
    TI__Genius 13460 points

    Hi Andrew,

    Thank you for reaching out to E2E.

    Both formulas are actually needed to calculate the gate threshold from the ADCDATA8 register code.

    DATA_OUTH(decimal) × 3.519mV is actually VADCDATA8, not VGTH. Once they solve for VADCDATA8 they can plug that value in VADCDATA8 × 8 to get VGTH.

    Combining both formulas you can simplify to VGTH = (DATA_OUTH(decimal) × 3.519mV) * 8

    Best regards,

    Andy Robles