HYBRID POWER BATTERY CHARGER CONTROL APPARATUS AND METHOD

摘要

A power supply system (10) and method for operating same. The power supply system (10) is connectable to receive power from an adapter (24) and supply power to a load (18). The power supply system (10) includes a rechargeable battery (22), a buck mode circuit (38,42), and a boost mode circuit (38,40). A switching circuit (64) switches between the buck mode circuit (38,42) and boost mode circuit (38,40) for supplying power to the load (18). If the power required by the load (18) reaches a first predetermined level related to an adapter overload condition for a first predetermined time (82), the switching circuit (64) disconnects said buck mode circuit (38,42) from the load (18) and connects the rechargeable battery (22) and the boost mode circuit (38,40) to the load (18). The first predetermined level may be established by a first predetermined percent of the current of a dynamic power management level established by the load (18), which is related to a power level below that which can be provided by the adapter (24).