LM5163H-Q1: LM5163

Taher Qader

Part Number: LM5163H-Q1

I developed a prototype, related to the datasheet, I measured a very high Vpp ~800mV, what can be wrong ?
I have used the schematic in the datasheet with an inductor from WE 74404084121

10 months ago

+1 Richard Fu22 10 months ago

TI__Mastermind 25030 points

Hi Taher,

By reducing your output voltage, you will likely have a larger inductor current ripple, so the output voltage ripple will be increased. You may see this relationship is true with equation 21 in the datasheet.

So a solution is to increase the output capacitance.

Thanks,

Richard

0 Taher Qader 10 months ago in reply to Richard Fu22

Prodigy 20 points

Thank you Richard!

yes, with increasing the caps I could decrease the ripple.

I will do some more tests in the next days

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LM5163H-Q1: LM5163