TPS62420: FB resistor recommendation

Zhou Fang67

Part Number: TPS62420

Hi Team,

From TPS62420 datasheet, the feedback resistor, it is recommend R12 within a range of 180kOhm to 360Kohm. Could we use 1kOhm to 10kOhm if operating current is not a concern?

Thanks.

Zhou

over 8 years ago

0 Chris Glaser over 8 years ago

TI__Guru**** 150770 points

Yes. This app note, found on the product page, explains more: www.ti.com/.../slyt469.pdf

What voltages do you need and at how much current? Do you plan to use the interface to adjust them? There are newer devices, which offer smaller sizes, though none are dual converters. TPS6223x would be the first choice.

0 Zhou Fang67 over 8 years ago in reply to Chris Glaser

TI__Expert 4250 points

Hi Chris,

It is a good app. The thing need to confirm whether FB resistor impact internal compensation circuit.

Thanks.
Zhou

0 Chris Glaser over 8 years ago in reply to Zhou Fang67

TI__Guru**** 150770 points

Yes it does, as explained in the app note.

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TPS62420: FB resistor recommendation