Switchable battery charger circuit

Details Switchable battery charger circuit Switchable battery charger circuit

2011-08-23

2011-08-23

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

Plural charging sources

C320S134000, C320S137000, C320S162000, C307S043000, C307S080000

Reexamination Certificate

active

08004247

ABSTRACT:
In one or more embodiments, a battery charger switching circuit enables a device to automatically select between multiple device interfaces individual ones of which are connectable to different power supplies for recharging the device. In at least some embodiments, selection of a particular device interface is based upon the magnitude of the voltage associated with a particular power supply. For example, the battery charger switching circuit can ascertain charge voltages associated with individual power supplies and select a power supply having a greater magnitude of charge voltage. In at least some embodiments, the battery charger switching circuit can enable charge control circuits associated with a particular power supply and disable charge control circuits associated with unselected power supplies in a manner that reduces or eliminates leakage current associated with unselected power supplies.

REFERENCES:
patent: 7023179 (2006-04-01), Nagai et al.
patent: 7414332 (2008-08-01), Ohsuga
patent: 7498694 (2009-03-01), Luo et al.
patent: 2007/0001646 (2007-01-01), Kojima

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