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TPS4811-Q1: Inrush current damage the MOSFET

Part Number: TPS4811-Q1

Tool/software:

The following figure shows the setup for testing. When testing the Inrush current, it may cause damage to Q401 and Q403
As shown in the waveform below:
Blue waveform: Bus current,

yellow: 24V_BUS;

Purple: 24V (test point in the schematic);

Green: TPS48111 PU PIN;

There will be a sudden change in bus current, then the MOS is damaged.

Is there are any relevant suggestions or solutions? 

Translation: Power---Capacitor array---Controller

  • Hi Fabio,

    If you are worried about inrush current damaging your device section 8.3.2 of the data sheet has recommendations for ways to mitigate inrush current

    With the amount of inrush you are getting I would recommend configuring the G pin of the TPS4811 to externally precharge and limit the inrush current

    If you have any more questions let me know!

    Best Regards,

    Nicholas