ZHCSJD3B July 2018 – February 2019 BQ25150
In order to prevent damage to the battery, the device will charge the battery at a much lower current level when the battery voltage (VBAT) is below the VLOWV level. The pre-charge current (IPRECHARGE) can be programmed through I2C. Once the battery voltage reaches VLOWV, the charger will then operate in Fast Charge Mode, charging the battery at ICHARGE.
During pre-charge, the safety timer is set to 25% of the safety timer value during fast charge.