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TPSI3052-Q1: Capability to maintain output voltage

franziskus
Expert 7148 points
Part Number: TPSI3052-Q1

Team,

can you confirm that the following understanding from my customer is correct?

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I was presuming that this IC was capable of keeping the output voltage level +15V DC (without switching cycle) by keeping the primary side “EN” input 5V (for example in three-wire mode) as a solid-state relay application oriented product. It is not explicitly clear though from the datasheet if that is the case.
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BR

  • +1
    TI__Expert 4886 points

    Hello Franziskus,

    Thanks for reaching out to our team on E2E. Your customer’s understanding is correct, since there is charge stored in the CDIVx capacitors, every time the driver output goes high, that stored charge is then shared with the MOSFET’s total gate charge spec (can be modeled as a capacitor using CVDRV = Qg/VDRV) to drive the MOSFET high. Whether this happens once (single high EN) or many times (as with switching frequency), this charge sharing process occurs each time. Please let us know if there are further questions.

    Best regards,
    Tilden Chen

    Solid State Relays | Applications Engineer

  • 0 in reply to Tilden Chen
    TI__Expert 7148 points

    Thanks Tilden, this is very helpful!