POWER SUPPLY AND ELECTRONIC DEVICE USING POWER SUPPLY

Title:

POWER SUPPLY AND ELECTRONIC DEVICE USING POWER SUPPLY

Document Type and Number:

WIPO Patent Application WO/2001/054257

Kind Code:

A1

Abstract:

A DC power supply (1) is connected to one end of the primary winding (2p) of a transformer (2), and the other end of the primary winding (2p) is connected to a switching element (3) controlled by a forward control circuit (4). A rectifier element (5), a chalk coil (7), a switching element (19) and a smoothing circuit (8) are connected in series between the secondary winding of the transformer (2) and an output terminal (9). A rectifier element (6) connected to the rectifier element (5) is connected in parallel with the secondary winding. A switching element (21) and a smoothing circuit (22) are connected in series between the output end of the rectifier element (5) and an output terminal (24). The forward control circuit (4) controls the switching element (3) according to the output voltage from the smoothing circuit (8). The separate control circuit (23) controls the switching element (21) according to the output voltage from the smoothing circuit (22).

Inventors:

NISHIDE TAKUYA (JP)

Application Number:

PCT/JP2001/000338

Publication Date:

July 26, 2001

Filing Date:

January 19, 2001

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
NISHIDE TAKUYA (JP)

International Classes:

H02M3/335; H02M3/28; (IPC1-7): H02M3/28

Foreign References:

JPS59110376A	1984-06-26
JPH0226382U	1990-02-21
JPS56139075A	1981-10-30

Other References: