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Original question:

TPS4811-Q1: reverse polarity protection

TPS4811-Q1: TPS4811-Q1 reverse polarity

Jochen Ruopp
Prodigy 120 points
Part Number: TPS4811-Q1

In the document "Achieving Reverse Battery Protection Using TI High Side Switch Controllers" in Fig. 2.3 another possibility is described.

Is this another feasible solution for reverse polarity protection on the Vs pin?

We use only one ground in our design, e.g. GND = PGND. Does this make any difference in the design of the reverse polarity protection?

This is related to the pins Vs (blocking capacitor), IWRN and EN/UVLO.

  • 0
    TI__Guru** 105361 points

    Hi Jochen,

    Thanks for reaching out!

    Jochen Ruopp said:
    Is this another feasible solution for reverse polarity protection on the Vs pin?

    Yes, it is for reverse polarity protection on Vs pin

    For reverse polarity protection, GND and PGND should be separated by a diode (as per Figure 2-2) or blocking FET (as per Figure 2-3) 

    Best Regards,

    Rakesh