LM51551-Q1: LM51551, input 18V boosted to 48V, experiencing EMC problems.

Ted Hung

Prodigy 30 points

Part Number: LM51551-Q1
Other Parts Discussed in Thread: LM51551, LM51561

Hi , Does anyone have a problem with too high frequency when EMC ISN is testing, what can be solved?

LM51551, input 18V Boost to 48V.

over 3 years ago

0 Brigitte over 3 years ago

TI__Guru 67355 points

Hello Ted,

EMC is heavily dependent on the used external components as well as the layout of the board. A quick solution might be to use LM51561 with spread-spectrum instead. LM51561 is a pin to pin device and can be exchanged on the board for testing.

Best regards,
Brigitte

0 Ted Hung over 3 years ago in reply to Brigitte

Prodigy 30 points

Hi Brigitte,

Thank you very much for this information, I will to get samples and do testing again, thanks~

Best regards,

Ted

Power management

Power management forum

LM51551-Q1: LM51551, input 18V boosted to 48V, experiencing EMC problems.