ZHCSJD3B July 2018 – February 2019 BQ25150
The charger has two main control loops that control charging when VBAT > VLOWV: the Constant Current (CC) and Constant Voltage (CV) loops. When the CC loop is dominant, typically when VBAT < VBATREG – 50 mV, the battery is charged at the maximum charge current level ICHARGE, unless there is a TS fault condition (JEITA operation), thermal charge current foldback is active, VINDPM is active, or DPPM is active. (See respective sections for details on these modes of operation). Once the battery voltage approaches the VBATREG level, the CV loop becomes more dominant and the charging current starts tapering off as shown in Figure 14. Once the charging current reaches the termination current (ITERM) charging is stopped.
The maximum fast charge current is limited by the IMAX resistor setting, even if a higher I2C value is programmed. See Maximum Allowable Charging Current (IMAX) for details on IMAX function.