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TPS653852A-Q1: EMC test optimization issues

Ethan Liu
Intellectual 1445 points
Part Number: TPS653852A-Q1

Tool/software:

Hi team,

The CE experiment found that the output of TPS653852A-Q1 has a spike every 2MHz. It is suspected that the chip's Buck-boost preregulator couples interference to the power line or other wiring harnesses. The waveform and frequency band punctuation are as shown below.

After adding an RC filter circuit to the Buck-boost preregulator, this spike will increase. Please help confirm whether there is a feasible solution to improve and reduce this spike?

Waveform after adding RC circuit:

Best regards

Ethan

  • 0
    TI__Expert 5040 points

    HI Ethan,

    I'm not supposed to answer anything regarding this device on the public forums as this is an NDA device. Please reach out to your local TI representative and have them contact me directly or post one the internal forums. We should be able to help you with this problem.

    Best,

    Michael Hernandez