Battery-powered apparatus for portable system
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United States of America Patent
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Issued Date -
Aug 28, 2008
app pub date -
Feb 27, 2007
filing date -
Feb 27, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention presents a battery-powered apparatus with an internal battery device and an external battery device for a portable system. Meanwhile the battery powered apparatus, applied to a portable system, includes a power path switching circuit having a power path multiplexer, a logic controller and a voltage detector connected to an external power supply, an internal battery device, an external battery device and the portable system, wherein the voltage detector is in response to inputting voltages of the external power supply, the internal battery device and the external battery device, and then provides the logic controller with information for determining one of the external power supply, the internal battery device and the external battery device electrically conducted to the portable system via the power path multiplexer; and a rechargeable battery charging circuit connected to the external power supply, the internal battery device, and the external battery device; and having a charging arbitrator in response to the external power supply, the internal battery device and the external battery device for determining to recharge the internal battery device and the external battery device.
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