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Original question:

BQ25700A: Datasheet

BQ25700A: Inductor select with IADPT pin pull low resister

Bruce Lin_899
Intellectual 870 points
Part Number: BQ25700A

Hi Expert

My ODM customer use BQ25700A and use 2.2uH in the begin, but they meet efficiency problem and change to 1.1uH inductor now.

They want to check if the pull low resister of IADPT pin need to change from 137K to 93K ?

In Datasheet, there are no clear description about this setting, does it also need high accuracy resister value?

Please help, thank you so much!

BR

Bruce

  • 0
    TI__Genius 16175 points

    Bruce,

    For efficiency problem, can you try better MOSFET and inductor to improve? ex: low RDson/Qg and DCR component.

    As for IADP resistor value, for 1uH inductor, please use 93kohm+/-3kohm resistor. And please also program switch frequency to 1.2MHz.

    Thanks