Electricity: battery or capacitor charging or discharging – Battery or cell charging – With detection of current or voltage amplitude
Reexamination Certificate
2008-06-22
2010-10-19
Tso, Edward (Department: 2858)
Electricity: battery or capacitor charging or discharging
Battery or cell charging
With detection of current or voltage amplitude
C320S163000
Reexamination Certificate
active
07816892
ABSTRACT:
A battery charger for charging a battery through controlling a charging regulation circuit is provided. The battery charger includes a constant voltage mode controller, a current sensing unit, and a reference voltage generator. The constant voltage mode controller is for comparing a battery voltage of the battery with a first reference voltage to generate a regulation signal, and utilizing the regulation signal to control the charging regulation circuit to regulate a charging current applied to the battery. The current sensing unit is for monitoring the charging current to generate an error signal. The reference voltage generator is for setting the first reference voltage according to the error signal. By adding a voltage generator to the battery charger, the overshoot charging current will be reduced and the mode transition will become smooth.
REFERENCES:
patent: 5923149 (1999-07-01), Umetsu
patent: 6028415 (2000-02-01), Nagai et al.
patent: 6166521 (2000-12-01), Mercer et al.
patent: 2003/0067283 (2003-04-01), Takimoto et al.
Hsu Winston
Margo Scott
Mediatek Inc.
Muralidar Richard V
Teng Min-Lee
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