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TPSI3050-Q1: Add resistance between EN-GND?

David Kim2
Expert 2935 points
Part Number: TPSI3050-Q1

Hi

The 1Kohm resistance was added between EN-GND for troubleshooting during the test.

And there was no problem when the ON/OFF test was conducted.

Is there anything that could be a problem by adding resistance?

If so, what additional tests should I try

Thanks

  • 0
    TI__Expert 5846 points

    Hello David,

    One problem might be the constant leakage current. Depending on the voltage at EN in 2-wire mode, with 1-kΩ pulldown at EN the leakage current can be anywhere from 6.5-mA to 48-mA. Increasing the external EN pulldown resistor to 100-kΩ can reduce the leakage current to 65-uA to 0.48-mA.

    Best regards,
    Tilden Chen

    Solid State Relays | Applications Engineer