MC34063A: EMI issue

Jeff YANG

Genius 5885 points

Part Number: MC34063A
Other Parts Discussed in Thread: LM5008

Hi,

I use MC34603 and LM5008 but meet EMI issue, I need provide what waveform to you for this issue?

Thanks

Jeff

over 3 years ago

0 Youhao Xi over 3 years ago

TI__Guru* 75440 points

Hi Jeff,

Could you tell which device caused the EMI issue? You have a buck with LM5008 and sepic with MC34063 in parallel? Please also provide the following info:

Operating conditions (Vin, Vout, and load)
EMI spectrum showing the emission exceeding the spec
Switch node voltage waveform of the circuit having EMI issues. If both LM5008 and LM34063 have EMI issues, please share both SW waveform. Please share both zoomed in signal which can show the details of a couple of switching cycle, and also the overview showing more cycles.

Thanks,

Youhao Xi, Applications Engineering

0 Jeff YANG over 3 years ago in reply to Youhao Xi

Genius 5885 points

Hi Youhao,

Would you please provide you email address, or add me to friend?

My customer do not agree post EMI report on E2E.

Thanks!

Jeff

0 Youhao Xi over 3 years ago in reply to Jeff YANG

TI__Guru* 75440 points

Hi Jeff,

Please accept my invitation to connect through PMS.

Thanks,

Youhao

0 Jones Cho over 3 years ago in reply to Youhao Xi

Prodigy 15 points

Hi Youhao, I am Jones for the EMI quesiotn, would you add me to fried?

Thanks!

0 Youhao Xi over 3 years ago in reply to Jones Cho

TI__Guru* 75440 points

Added. Thanks

Power management

Power management forum

MC34063A: EMI issue