With battery charging is enabled (CHG_CONFIG bit = 1 andCE pin is LOW), the device autonomously completes a charging cycle without host involvement. The device default charging parameters are listed in Table 9-3. The host can always control the charging operations and optimize the charging parameters by writing to the corresponding registers through I²C.

A new charge cycle starts when the following conditions are valid:

• Converter starts
• Battery charging is enabled (CHG_CONFIG bit = 1 and I_CHG register is not 0 mA andCE is low)
• No thermistor fault on TS
• No safety timer fault
• BATFET is not forced to turn off (BATFET_DIS bit = 0)

The charger device automatically terminates the charging cycle when the charging current is below termination threshold, battery voltage is above recharge threshold, and device not is in DPM mode or thermal regulation. When a fully charged battery is discharged below recharge threshold (selectable through VRECHG bit), the device automatically starts a new charging cycle. After the charge is done, toggle CE pin or CHG_CONFIG bit can initiate a new charging cycle.

The STAT output indicates the charging status: charging (LOW), charging complete or charge disable (HIGH) or charging fault (Blinking). The STAT output can be disabled by setting EN_ICHG_MON bits = 11. in addition, the status register (CHRG_STAT) indicates the different charging phases: 00-charging disable, 01-precharge, 10-fast charge (constant current) and constant voltage mode, 11-charging done. Once a charging cycle is completed, an INT is asserted to notify the host.