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TPD6S300A: TPD6S300a behavior not able to sink power

Part Number: TPD6S300A
Other Parts Discussed in Thread: STRIKE,

Hi team,

Our customer is facing the failure on EFT testing

Standard: EN/IEC 61000-4-4

The pulse will inject to adapter and connects to NB type-C port.

From the first waveform as below, it shows internal switch is OFF, but we have chance to see first waveform that PD(987DDJ) won't sink anymore after the strike.

From the second waveform, it can renegotiate after the strike.

Comparing these 2 waveforms, seems the CC2 will pull high and able to make re-negotiation again.

How does the Rd on TPD6S300A act during these moment? not sure is PD presenting or TPD6S300A presenting.

CC2_PD_PRO: measure point between PD and TPD6S300A

CC2: measure on connector

  • Hey Oliver,

    If the system the TPD6S300A is connected on is acting as the source, then the TPD6S300A is the one presenting the RD during such an event. Section 8.3.5.2 of the datasheet goes into more detail of this functionality, but in short:

    The CC OVP FET in the TPD6S300A will open up and hide the PD controllers RD for 0.93ms, causing a potential for a disconnect on the source USB Type-C port. To solve this problem, TPD6S300A turns on its dead battery RD resistor in an OVP event caused by an IEC 61000-4-2 ESD strike while the CC OVP FET is OFF.

    Hope this helps answer your question