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TPS2116: TPS2116EVM

Part Number: TPS2116

Hi,

I am trying to use this dev kit to test out my application. here is the setup 

VIN1 -- 3.3V li-ion battery

VIN2 -- 3.3V li-ion battery

The end goal is .. 

if VIN1 goes below 2.5V switch to VIN2. 

Doesn't matter what i set the PR1 jumper values it does not switch to VIN2 until the VIN1 voltage goes below 1V.

the dev kit doc or the datshaeet doesnt seem to provide much help here as well. any help will be much appreciated.