LM25088: How to reduce switching noise.

Louis Han15

Genius 4680 points

Part Number: LM25088

Hello

I Designed with reference to the LM25088MH-1EVAL using LM25088.

However, overshoot noise occurs as shown in the waveform below.

How can I reduce this noise?

Best Regards.

0 Frank De Stasi over 5 years ago

I would try to adjust the values of the snubber. TI has app notes that should help with this.

I would also try connecting the bottom of the snubber to ground rather than the CS pin.

Finally, the biggest contributor to spikes and ringing is the PCB layout. The inductance associated

with the SW node must be as small as possible. This includes the diode, inductor, FET and snubber.

These components must be as close as possible to limit the current loop area.

0 Louis Han15 over 5 years ago in reply to Frank De Stasi

Genius 4680 points

Hi Frank

Thansk for your support

Could you provide app note?

Best Regards.

0 Frank De Stasi over 5 years ago in reply to Louis Han15

Hello

I have attached a few here.

Please also visit the TI website for more information.

Thanks

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