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TPS61196: How to protect IFB inputs from transient damage

Mitchell
Expert 4915 points
Part Number: TPS61196

Hi Team,

We are using the TPS61196 in an RGBW lighting application and seeing transient issues on power up. It seems that this device is prone to transient damage on the current feedback (IFB) inputs, typically occurring upon first power-up. Have you seen this behavior before?  Do we have any suggestions to protect against it?

One suggestion we've thought of is to add a 0.1uF cap between IFB and AGND to limit the voltage spike on turn on. Do you think this will help to eliminate these issues?

Thanks,
Mitchell

  • 0
    TI__Expert 4550 points
    Hi Mitchell,
    We don't see this problem before, adding small capacitor could be helpful to bypass the transient noise. I would suggest to check the layout and find where is the coupling path to coupling this noise to IFB pins.