TPS62873-Q1: EMC issues with chips

Hello Tony,

Thanks for reaching out to us.

To better understand the issue, can you provide the following items below?

1. Schematic diagram

2. PCB layout

3. Radiated EMI test setup

Best regards,

Excel

TPS62873-LM5156 PCB layout.docx

The attachment includes a schematic diagram and layout. Please provide detailed modification suggestions EMC RE testing can be done according to general testing requirements

Hi Tony,

Thanks for sharing the file. I will review it and provide feedback on Monday.

Best regards,

Excel

Hello Tony,

Please refer to the attached file on how to potentially reduce the radiated EMI on customer application. Once they have the new EMI measurement, kindly share it.

Thank you.

TPS62873-Q1_radiated EMI issue_v.1.0.pptx

Best regards,

Excel

Is this the only suggestion for modifying the schematic and layout?Do you have any other suggestions? Please provide as much detail as possible. Thank you!

Hello Tony,

Fixing EMI is a complex process and cannot be attributed to one particular converter only. So, please suggest to your customer to implement first the items I suggested in the .ppt file in my previous post, then share the result.

By the way, how your customer able to identify that it was TPS62873-Q1 caused the high Radiated EMI?

Best regards,

Excel

Hi Tony, 

Just a gentle reminder. 

Did you get the evaluation result from your customer?

Best regards,

Excel

Hello Tony,

Do you have any updates from your customer?

Best regards,

Excel