A multi-output switching power supply

A switching power supply, multi-output technology, applied in the output power conversion device, the conversion of AC power input to DC power output, electrical components and other directions, can solve the problems of complex control, reduced switching power supply efficiency, and small improvement effect.

Active Publication Date: 2020-12-25
GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method will either reduce the efficiency of the switching power supply, or when the difference between the output power of the main circuit output terminal and the auxiliary circuit output terminal is greater, the improvement effect will be smaller, or the control is complicated

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  • A multi-output switching power supply
  • A multi-output switching power supply

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments of the description. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0024] see figure 1 , a multi-output switching power supply provided by an embodiment of the present invention, including: a transformer 10, a main output terminal 11 connected to the main output winding of the transformer 10, and an output terminal 11 connected to the auxiliary output winding of the transformer 10 Auxiliary road ...

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Abstract

The embodiment of the invention discloses a multiplex output switching power supply, comprising a transformer, a main circuit output terminal connected with a main circuit output winding of the transformer and an auxiliary circuit output terminal connected with an auxiliary circuit output winding of the transformer; the multiplex output switching power supply also comprises a sampling branch connected in parallel with the auxiliary circuit output winding of the auxiliary circuit output terminal, and a control branch connected with the sampling branch and the auxiliary circuit output winding respectively, wherein the sampling branch is used to sample the output voltage of the auxiliary circuit output terminal; and the control branch is used to adjust the number of turns of coils that are used for connecting the auxiliary circuit output winding and the sampling branch in parallel according to the size of the output voltage of the auxiliary circuit output terminal, and further controls the output voltage of the auxiliary circuit output terminal to be within a set output voltage threshold range.

Description

technical field [0001] The invention relates to the field of switching power supplies, in particular to a multi-channel output switching power supply. Background technique [0002] In the multi-output flyback switching power supply, when the output power of the output terminal of the main circuit is not synchronized with the output power of the output terminal of the auxiliary circuit, the output voltage of the output terminal of the auxiliary circuit will fluctuate greatly. When the load at the output end is lightly loaded, the output voltage at the output end of the auxiliary circuit will increase, and when the load at the output end of the main circuit is lightly loaded and the load at the output end of the auxiliary circuit is fully loaded, the output voltage at the output end of the auxiliary circuit will decrease. This is a flyback switch with multiple outputs. Cross-regulation issues in power supplies. [0003] At present, some methods have been used to improve the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217
CPCH02M7/217
Inventor 左远洋
Owner GUANGDONG MIDEA WHITE HOME APPLIANCE TECH INNOVATION CENT CO LTD
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