Forum Post: Unable to calibrate BQ78PL116 on one board

Hi,

I have a procedure to calibrate the current on my boards.  It's a board using a BQ78PL116 and a BQ76PL102 to manage 5 cells.  It's been working very well for 3 prototypes but there is something wrong when I try to calibrate the 4th prototype.

I'm charging the battery pack at 3 amps, I enter the value 3000mA and I push calibrate.  With the problematic board - it senses 6380mA with a gain of 2.000 - I expect the gain to change to realize it's 3amps instead of 6.3 but the gain is stock to 2.000.  I attach an image

Any idea why the gain is stock?

Anybody had this king of problem before ?

Regards, Max