Title:
電源装置の制御回路および電源装置の制御方法
Document Type and Number:
Japanese Patent JP4484839
Kind Code:
B2
Abstract:
This invention aims at providing a control circuit of power supply in which a secondary battery and a device are connected in parallel, to output capable of preventing over-charging of the secondary battery and supplying power from the secondary battery to the device, and a control method of the power supply. A device 5G and a secondary battery 2G are connected to a DC-DC converter 1G in parallel. The device 5G is supplied with both a power from the DC-DC converter 1G and a power from the secondary battery 2G. When the secondary battery 2G is in non-charging state, an offset circuit 15G supplies a positive offset for reducing a difference of voltage between a detection signal Vx1G and reference voltage e1G to a reference voltage e1G corresponding to a charging inhibit signal CAS. An error amplifier ERA1G reduces an actually flowing charging current CCG by an amount corresponding to the offset value as a result of recognizing that the charging current CCG flows more by the amount corresponding to the offset value.
More Like This:
Inventors:
Hidekiyo Ozawa
Takashi Matsumoto
Takahiro Yoshino
Takashi Nakamura
Takashi Matsumoto
Takahiro Yoshino
Takashi Nakamura
Application Number:
JP2006093574A
Publication Date:
June 16, 2010
Filing Date:
March 30, 2006
Export Citation:
Assignee:
Fujitsu Microelectronics Limited
International Classes:
H02J7/34; H01M10/44; H02H7/18; H02J1/00; H02M3/155
Domestic Patent References:
| JP2005261018A | ||||
| JP2005328660A | ||||
| JP2000029544A | ||||
| JP2005143211A | ||||
| JP2002243771A |
Attorney, Agent or Firm:
Hiroto Tanaka