Battery charger for preventing both overshoot charging...

Details Battery charger for preventing both overshoot charging... Battery charger for preventing both overshoot charging...

2004-11-29

2008-11-11

Ullah, Akm Enayet (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With detection of current or voltage amplitude

C320S152000, C320S157000, C320S158000, C320S159000, C320S163000

Reexamination Certificate

active

07449865

ABSTRACT:
The present invention provides a battery charger and a method for preventing both an overshoot charging current and an overcharged battery voltage during a mode transition. The battery charger includes a charging regulation circuit having an input terminal, an output terminal, and a control terminal, in which the charging regulation circuit outputs a charging current whose amount is regulated based on a first regulation signal at the control terminal. The battery charger also includes an operational amplifier having a positive input terminal, a negative input terminal, and an output terminal for generating the first regulation signal; The battery charger contains a first switch unit and a second switch unit for controlling current flow in the battery charger.

REFERENCES:
patent: 2005/0212489 (2005-09-01), Denning et al.

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