Hi,
I need support to understand the correct config to be able to charge 4s LiFePO4 cells.
I'm able to charge 1 and 2 cells. No luck with 3s and 4s (both 750kHz and 1.5MHz config).
ILIM_HIZ is set to 500mA.
I've checked that 4s 1.5MHz PROG = 17.4k
I'm using VAC1 input from 5V to 20V.
I tried also to bypass VAC to VBUS.
What I always get is STAT pin in fault condition (1Hz toggling).
The BQ on the evaluation board is marked as PX2579X.
