TPS6286A06: WEBENCH®︎ POWER DESIGNER FB resistor R2 question

Hung Jason

Part Number: TPS6286A06

Tool/software:

Dear Sir

Datasheet 9.2.2.2, show about R2 recommend equal less than 100k to have 6uA current in the voltage divider

But in WEBENCH® POWER DESIGNER FB resistor, always 200k

Is it correct?

Jason

0 Canan Priess 1 month ago

Hi Jason,

this is a system calculated webench values. Thank you for pointing it out. We will cross check and return back to you

Regards

Canan

0 Hung Jason 1 month ago in reply to Canan Priess

Hi Canan

Thanks for reply.

BTW, TPS6286A06/10 EVM, sluud28, also have same question.

0 Werner Lummer 1 month ago in reply to Hung Jason

Hello Jason,

the 100k in the datasheet is a general recommendation for a noise robust feedback divider.

Depending on your application and requirements, you can choose higher resistor values to reduce the current and therefore increase efficiency.

If you don't need to squeeze the last bit of efficiency, I recommend you use a 100k resistor.

I hope this answers your question.

Regards, Werner

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