Title:
POWER SUPPLY CIRCUIT
Document Type and Number:
Japanese Patent JP2008086126
Kind Code:
A
Abstract:
To provide a power supply circuit whose restoration is easy after a short circuit between input/output of a regulator.
The power supply circuit 10 is provided with a control circuit 12 controlling a duty ratio of switching with respect to voltage of a primary coil NP of a transformer T, a rectifier circuit 14 connected to a secondary coil NS of the transformer T, a regulator 16 reducing voltage, a first Zener diode Z1 feeding back output voltage of the rectifier circuit 14 to the control circuit 12 from a terminal A between the rectifier circuit 14 and the regulator 16, and a second Zener diode Z2 feeding back output voltage of the regulator 16 to the control circuit 12 from an output terminal B of the regulator 16.
Inventors:
FUJIMOTO KATSUTO
TAINAKA ISAJI
TAINAKA ISAJI
Application Number:
JP2006263660A
Publication Date:
April 10, 2008
Filing Date:
September 28, 2006
Export Citation:
Assignee:
KATATA DENKI KK
International Classes:
H02M3/28; G05F1/56
Domestic Patent References:
| JPH08149822A | 1996-06-07 | |||
| JPH0479764A | 1992-03-13 | |||
| JPH04178A | 1992-01-06 |
Attorney, Agent or Firm:
Takayoshi Kusumoto
Ken Masuda
Takanobu Nakaetsu
Ken Masuda
Takanobu Nakaetsu
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