Charge control circuit

Details Charge control circuit Charge control circuit

2011-03-01

2011-03-01

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

C320S135000, C320S136000, C320S162000, C320S163000

Reexamination Certificate

active

07898217

ABSTRACT:
In a charge control circuit that adjusts a charging current flowing through a battery to be charged from a power supply, a sense resistor is provided on a charging path to the battery from an external power supply. A charging current adjustment circuit adjusts the charging current based on an error voltage between a voltage drop across the sense resistor and a predetermined reference voltage. The charging control circuit is integrated in a package. The charging current is inputted to a current input terminal. A battery terminal outputs the charging current to the battery. The current input terminal and the battery terminal also function as terminals used to measure a resistance value of the sense resistor. A voltage monitoring terminal is provided to measure the reference voltage in an inspection process.

REFERENCES:
patent: 5254951 (1993-10-01), Goto et al.
patent: 6194875 (2001-02-01), Takimoto et al.
patent: 6215279 (2001-04-01), Rakovski et al.
patent: 6218811 (2001-04-01), Tokuyama
patent: 6373225 (2002-04-01), Haraguchi et al.
patent: 7012405 (2006-03-01), Nishida et al.
patent: 9-219935 (1997-08-01), None
patent: 11-69635 (1999-03-01), None
patent: 2001-14040 (2001-01-01), None
patent: 2003-180038 (2003-06-01), None
patent: 2004-080927 (2004-03-01), None
patent: 2006-101566 (2006-04-01), None
Japanese Office Action for Patent Application No. 2006-130022 dispatched Apr. 20, 2010 with English translation.

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