Title:
POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/031098
Kind Code:
A1
Abstract:
This power supply device supplies direct-current output to an output connector (2) from both an AC adaptor circuit (1), and a DC-DC conversion circuit (5) having a secondary battery (4) as a power supply. The power supply device is provided with: an output switch (8) connected between the DC-DC conversion circuit (5) and the output connector (2); a control circuit (9) that turns on and off the output switch (8); and a power failure detection circuit (6) that detects a failure of a commercial power supply. The DC-DC conversion circuit (5) is held in an operational state in both a power conducting state and a power failure state, and when the power failure is detected, the output switch (8) is turned on, and direct-current power is outputted to the output connector (2) from the DC-DC conversion circuit (5). Consequently, at the moment when the commercial power supply has failed, a direct-current voltage is outputted from the secondary battery, and the direct-current power can be constantly and stably outputted to the output connector.
Inventors:
SHIRASAWA KATSUYUKI
ITAKURA YOSHIKAZU
SUGIHARA RYUZO
ITAKURA YOSHIKAZU
SUGIHARA RYUZO
Application Number:
PCT/JP2015/001897
Publication Date:
March 03, 2016
Filing Date:
April 03, 2015
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
International Classes:
H02J9/06; H02J7/34
Foreign References:
| JP2000236635A | 2000-08-29 | |||
| JPH04304160A | 1992-10-27 |
Attorney, Agent or Firm:
TOKUDA, Yoshiaki et al. (JP)
Yoshiaki Tokuda (JP)
Yoshiaki Tokuda (JP)
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