ZHCSPC2C September 2021 – January 2023 BQ25180
PRODUCTION DATA
The device will automatically terminate charging once the charge current reaches ITERM, which is programmable through I2C. After termination the charger will operate in high impedance mode, disabling the BATFET to disconnect the battery. Power is provided to the system (SYS) by IN supply as long as VIN > VUVLO, VIN > VBAT + VSLEEPZ and VIN < VIN_OVP.
Termination is only enabled when the charger CV loop is active in fast charge operation. Termination is disabled if the charge current reaches ITERM while the VINDPM, DPPM, or thermal regulation loops are active. The charger will only go into the termination when the current drops to ITERM due to the battery reaching the target voltage and not due to the charge current limitation imposed by the previously mentioned controlled loops.
Post termination, the battery FET is disabled and the voltage on BAT pin is monitored to check if it has dropped to the VRCH threshold. If it does, a new charge cycle is established. The safety timers are reset. During charging or even when charge is done, a higher SYS load will be supported through the supplement operation.