LMR14030-Q1: Influence of spread spectrum to EMI

Kuramochi Tadahiko

Guru 28715 points

Part Number: LMR14030-Q1
Other Parts Discussed in Thread: LMR14030

Hi,

Attached data is conducted noise measured on my customer's board.

Are these frequent peak(about 700kHz) caused by influence of spread spectrum?

Best Regards,

Kuramochi

0 Andy Chen over 8 years ago

Hi,

What's the RT mode frequency set by customer? spread spectrum will generate about low freq ripple with freq=Fsw /128.

0 Kuramochi Tadahiko over 8 years ago in reply to Andy Chen

Guru 28715 points

Hi,

I have additional information.

I confirmed that the power supply is a battery for a car and the load is resistance.

So it is assumed that measurement equipment is not a cause.

Can LMR14030 occur above peak?

If yes, what behavior is the cause?

Best Regards,

Kuramochi

0 Jason Wang (BSR-MV) over 8 years ago in reply to Kuramochi Tadahiko

the question has been answered by direct email, so will close this question.

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