DRV3946-Q1: EMC issue --Radiated Emission– IC Strip-line test

Amber Si

Part Number: DRV3946-Q1

Tool/software:

Hi team,

my customer use DRV3946-Q1 in BMS for BMW, they are doing IC Strip-line test, BMW require pass class 6 at 70-120M frequency. They are facing challenge to meet requirement.

I check the EMC report BU test, also find at 20M/40M/60M/80M, there is peak. Why there are peaks at these frequency? it will affect pass class6, so how to improve this issue?

Amber

7 months ago

0 Ibinu Alaudeen Nadeera 7 months ago

TI__Genius 11731 points

Hi Amber,

Thanks for the question.

Can you confirm which hardware the testing is being done. Also please share the schematics and layout of the board.

Thanks,

ibinu

0 Amber Si 7 months ago in reply to Ibinu Alaudeen Nadeera

TI__Intellectual 2125 points

Hi Ibinu,

I summarize what your want as attachment

RF-CP test results.pptx

Amber

0 Amber Si 7 months ago in reply to Amber Si

TI__Intellectual 2125 points

HI Ibinu

May I get your feedback ？

0 Ibinu Alaudeen Nadeera 7 months ago in reply to Amber Si

TI__Genius 11731 points

Hi Amber,

Thanks for the feedback.

Can you also confirm how the profile looks like when the device is turned OFF.

Thanks,

Ibinu

0 Amber Si 7 months ago in reply to Ibinu Alaudeen Nadeera

TI__Intellectual 2125 points

Hi Ibinu,

Customer power off DRV3946, and RE test can pass without DRV3946. For more efficiency, I'll book your time for discussing how we can helo customer improve EMC issue, and pls reach out to EMC team if you are not expert at this issue.

Amber

0 Keerthivasan Kumanan 7 months ago in reply to Amber Si

TI__Mastermind 18425 points

Hi Amber,

From the picture you have shared, I don't see where it is violating the limit line. Could you share at what specific frequencies, the limit is violated?

Is there an email thread/ meeting for this discussion?

Best,

Keerthi

0 Amber Si 7 months ago in reply to Keerthivasan Kumanan

TI__Intellectual 2125 points

Hi Keerthi

I have set up a meeting to discuss this issue, I'll forward calendar to you! as Chinese New Year is coming, calendar is on Feb 6th. Looking forward to your attending.

Amber

0 Keerthivasan Kumanan 7 months ago in reply to Amber Si

TI__Mastermind 18425 points

Hi Amber,

Thank you for sending invite. We will talk then.

Best,

Keerthi

0 Ibinu Alaudeen Nadeera 7 months ago in reply to Keerthivasan Kumanan

TI__Genius 11731 points

HI Amber,

Since we are discussing on this in meetings, lets plan to close this e2e.

Thanks,

Ibinu

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DRV3946-Q1: EMC issue --Radiated Emission– IC Strip-line test