| 摘要 |
The disclosed embodiments provide a system that manages use of a battery (322) in a portable electronic device. During operation, the system provides a charging circuit (330, 334, 336, 340, 342, 344, 346) for converting an input voltage (Vbus) from a power source (302) into a set of output voltages (VHIn, VLO) for charging the battery (322) and powering a low-voltage subsystem (350) and a high-voltage subsystem (352, 354, 356) in the portable electronic device. Upon detecting discharging of the battery (322) in a low-voltage state, the system uses the charging circuit to directly power the low-voltage subsystem from a battery voltage of the battery and up-convert the battery voltage to power the high-voltage subsystem. |
