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TPSI3050-Q1: EMC Test Issue 2

Part Number: TPSI3050-Q1


Hi,

The customer is conducting EMC testing of the precharge relay.

2630.Schematic.pdf

EMC Test 2 Condition

- During operation, enter the waveform randomly into the J1 connector.

Input Point : J1 con 1 pin : + COM, J1 con 13 pin : 1GND, J1 con 14 pin : 2GND

The waveform image of the output point that varies with the random input waveform.

Output Point : T4(Probe) / T12(GND), T19(Probe) / T27(GND)

The customer tested the input part CAP capacity increase & TVS diode additionally but did not improve.

Please recommend a way to improve the gate drive voltage.

  • Hello CHO,

    • Customer should place TVS diode in parallel, not series.
    • What's the frequency or frequency range of the input noise?
      • Can the customer please provide a waveform of the EN input along with the VDRV output?
      • Customer can try a pi filter depending on the frequencies.

    Best regards,
    Tilden Chen


    Solid State Relays | Applications Engineer