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TPSI3050-Q1: Question about VDDM.

David Kim2
Expert 2275 points
Part Number: TPSI3050-Q1

Hi

I'm not going to use a VDDM pin.

So I just need to connect the cap to VDDH and VSSS?

Can I open VDDM?

Thanks

  • 0
    TI__Expert 3575 points

    Hi David Kim2,

    Thank you very much for reaching out.

    CDIV1 and CDIV2 act as bootstrap capacitors where CDIV2 charges to 5V (VDDM) and CDIV1 charges 5V above VDDM producing a 10V rail (VDDH) with reference to VSSS. These two capacitors are required for the device to function properly. In addition, VDDH has a UVLO that will assert VDRV low if triggered. 

    Let us know if this answered your question. 

    Sincerely, 

    Francisco Lauzurique