ELECTRONIC APPARATUS, CHARGING DEVICE, AND CHARGE-REGULATING CIRCUIT

Japanese Patent JP3863546

B2

PROBLEM TO BE SOLVED: To provide a regulating charging technique which can efficiently charge a secondary battery provided in the electronic apparatus.
SOLUTION: The electronic apparatus, having an input part with a constant-voltage output in the output of a prescribed current or smaller to the input power from a power source lowering down the voltage in the output of the prescribed current or larger, to give an input from the input part to a load, in addition to charging of a secondary battery with power from the input part as input, is constituted so as to have a power input sensing means for sensing the input of power given from the input part; a charger for charging the secondary battery with the current from the input part as the input; and a charge control circuit for controlling the charge current given to the secondary battery by the charger, according to power input information sensed by the power input sense means, so that the sum of the changing current and the charge current substantially do depart from the constant-voltage region of the power source, where the current given to the load from the input part is changed, according to the condition of the load.

Koichi Matsuda
Mitsuo Saeki
Nobuo Tanaka
Hidekiyo Ozawa

JP2005248147A

December 27, 2006

August 29, 2005

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富士通株式会社

H02J7/04; H02J7/34; H02J7/10; (IPC1-7): H02J7/10

JP7177681A
JP6335172A
JP6133472A
JP6178460A
JP6029903A
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JP5003633A
JP4150728A
JP3273832A
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JP63103627A
JP57211945A
JP59176341U
JP59176340U

Hikaru Okada
Akira Yamatani
Yoshiyoshi Ogasawara

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