Hello
I am using the BQ24125 to charger 3 cell Li-Po @ 500mA. The charging itself is working fine, but I'm not getting a change in indicators for STAT1/2 from charging to complete. I believe my connection to my host microcontroller is working ok because if I short the NTC to ground then I get both STAT1/2 active to show an error.
I have had the charger going for a while now, and the current has dropped from the initial 500mA down to 27mA where it stays for a while (current measured into the battery itself).
My values are:
22uH inductor
Rsns = 0.2R
Cout 4.7uF
R(iset1) = 9.31K
R(iset2) = 9.31K
Is there something I'm missing? I'm trying to get an LED to change from red while charging to green when complete, or amber for fault - controlled my a microcontroller detecting the state of STAT1/STAT2.
Cheers - Matt Botherway