| 摘要 |
The current augmentation method is for use with a computer powered peripheral subsystem including a dynamic load, the dynamic load requiring greater power, from time to time, than the specified power available from the computer and specified interconnect bus or interface. This method includes use of a power node supplying power as necessary from the battery to the dynamic load, such that the varying dynamic load does not exceed the specified power available from the computer and interconnect bus. The method includes monitoring the load current, and injecting current into the power node to augment the current drive capability of the computer and peripheral bus. Preferably, the injecting is performed selectively based upon the result of the monitoring, e.g. only when the sensed load current is approaching a defined threshold level. Further, battery charging is performed only when it is determined that no current is being drawn through the battery to avoid distorting the voltage reading. The invented apparatus is also for selectively charging the battery from the current on the bus during relatively idle periods of peripheral dynamic load. The apparatus includes means for determining the chargeability of the battery in accordance with predefined chargeability criteria, and a battery charging circuit responsive to the determining means for selectively charging the battery only during times when the peripheral load current is limited and there is sufficient current available on the bus from the computer to recharge the battery. |
