LMR14030-Q1: EMI Performance

Kuramochi Tadahiko

Guru 28715 points

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

Hi,

I received the following question from my customer.

I attach EMI data measured by my customer.

Peaks exist per 500kHz~1MHz on the below data.

What is these peaks caused by?

Is it sub-harmonic resonance?

If you need schematics, please send the email to kuramochi@fujiele.co.jp.

Best Regards,

Kuramochi

0 Vental Mao over 8 years ago

What's your working condition and the full name of the part number?

0 Kuramochi Tadahiko over 8 years ago in reply to Vental Mao

Guru 28715 points

Mao-san,

Thank you for your response.
I send mail.

Best Regards,
Kuramochi

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

Hi

There are two LMR14030 on board, pls ask ctm to test EMI with only one LMR14030 working to see if the small peak near 700KHz is still exist?

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

Guru 28715 points

Chen-san,

Thank you for your advice.
Could you tell me what is purpose of above experiment?

Best Regards,
Kuramochi

0 Vental Mao over 8 years ago in reply to Kuramochi Tadahiko

Just want to verify whether the Non-synchronize phase cause the glitch.

Power management forum