Title:
CHARGE CIRCUIT AND CHARGE CONTROL METHOD FOR PORTABLE COMMUNICATION APPARATUS
Document Type and Number:
Japanese Patent JP3827665
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To offer a charge circuit for a portable communication apparatus, which can suppress heat generation even in case the portable communication apparatus is operated during charge and besides can execute the charge efficiently, and a charge control method.
SOLUTION: This charge circuit has a secondary battery 103 being a main power source and a reserve secondary battery 104. When the portable communication apparatus gets in communication state while charging the secondary battery by connection of an AC adaptor 20, it drives the portable communication apparatus while charging the secondary battery by the AC adaptor if the output voltage VB1 of the secondary battery is not less than the set voltage α, and it drives the portable communication apparatus by the reserve secondary battery while charging the secondary battery by the AC adaptor if VB1<α.
Inventors:
Satoshi Suzuki
Application Number:
JP2003322442A
Publication Date:
September 27, 2006
Filing Date:
September 16, 2003
Export Citation:
Assignee:
NEC Access Technica Co., Ltd.
International Classes:
H02J7/34; H04B7/26; (IPC1-7): H02J7/34; H04B7/26
Domestic Patent References:
| JP8130833A | ||||
| JP8251098A | ||||
| JP11103532A | ||||
| JP200347167A |
Attorney, Agent or Firm:
Yuji Katsuragi
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