Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

  • State TI Thinks Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 65 subscribers
  • Views 1181 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

WEBENCH® Tools/TPS54302: BURN IC

kamlesh patel
Prodigy 120 points
Part Number: TPS54302

Tool/software: WEBENCH® Design Tools

Dear Sir

we have Design DC-DC Power supply by using TPS54302 (Package->SOT-6) IC,.we have generate schematic using webench Design tools.

IC is burn out in sometime on my board. we getting IC burn out issue in 6 board out of 10 board.

we have seen that is generate 5V but after in second of time int burn out and IC become short(5v track become short ).

after removing IC , 5v Track Short issue resolve.we have trying to debugging issue but not getting find problem.

please help to me.

please suggest to me for your opinion.

Best Regads

Kamlesh patel

i have attached mt schematic and Layout file.

  • 0
    TI__Expert 4035 points

    Hi,

    Over voltage on the input side is highly suspected. Please try to measure the voltage spike on the input cap under different conditions.

    Schematic of TPS54302 looks ok. On the layout, the 100nF MLCC cap at the input side should be very close to IC VIN and GND pin to filter voltage spike or noise from external source. Currently, if you can put the C58 at location of R4 would be good. I suggest to do the layout by referring to TPS56339EVM.

  • 0 in reply to Ryan Hu (BSR-MV)
    Prodigy 120 points

    Hi Ryan

    Greetings Morning

    thanks for Replay,we are use 24V Adaptor for input power supply.

    so i think it doesn't possible to voltage spike on the input side.

    we have also measure voltage and it always give 24.5v max output.

    it is possible to any effect of  electrolytic Capacitor instead of Ceramic or tantalum capacitor in  design.

    Best regards

    Kamlesh patel

  • 0 in reply to kamlesh patel
    TI__Expert 4035 points

    Hi Kamlesh,

     E-cap is supported by this device, but MLCC cap would be better. What's the operation condition before the device was burnt? Does it have hot plug-in operation or output hardshort test? As I mentioned, you need put the 100nF MLCC cap more closer to the IC VIN and GND.

  • 0 in reply to kamlesh patel
    TI__Expert 4795 points

    Hi Kamlesh,

    How is your issue going? Hope Ryan already help resolve it. Let us know if you need further help.