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UCC3813-4: The output pin being short to Gnd pin found

Part Number: UCC3813-4

Hi Expert,

The customer reported the UCC3813-4 output pin being short to Gnd pin from end customer site.

They can see 19 units being damage during 4000 units build.

Can you help to comment the schematic and captured waveforms as attached.

And give the advice to us if had.

Best regards,

Eric Lai

 

Field Application Engineer

Texas Instruments Taiwan Limited

O: +886-2-2175-2582

M: +886-909-262-582

E-Mail:Eric.Lai @ti.com

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1 Reply

  • Hi Eric,

    Thanks for your interest in UCC3813-4. If possible, could you reattach the waveforms you shared? I am not able to open them from your post. You can also email them to me at ben.lough@ti.com. Do you know why R155 is connected from the MOSFET gate to ISENSE? If R155 is meant to be a pull down for the MOSFET gate, you could connect R155 from the FET gate to ground. Once I have the waveforms I can make further suggestions.

    Best Regards,
    Ben Lough

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