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Switching power supply and electronic equipment

A switching power supply and main switch technology, which is applied in the direction of high-efficiency power electronic conversion, conversion equipment with intermediate conversion to AC, electrical components, etc., can solve problems such as clamping switches and output diode damage, and reduce selection requirements and lighten components. damage effect

Active Publication Date: 2020-12-29
HUAYUAN SEMICON SHENZHEN LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a switching power supply and electronic equipment to solve the problem that the clamp switch and the output diode may be damaged

Method used

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  • Switching power supply and electronic equipment
  • Switching power supply and electronic equipment
  • Switching power supply and electronic equipment

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Embodiment Construction

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0067] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or...

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Abstract

The invention provides a switching power supply and electronic equipment. The switching power supply comprises an active clamping circuit and a transformer, wherein the active clamping circuit comprises a first clamping capacitor and a second clamping capacitor, the active clamping circuit also comprises a path guide module, the path guiding module is connected with the two ends of the first clamping capacitor and the two ends of the second clamping capacitor respectively, the path guiding module, the first clamping capacitor and the second clamping capacitor are directly or indirectly connected with the primary side of a transformer, and the path guiding module is used for guiding the first clamping capacitor and the second clamping capacitor to obtain electric energy from different positions of the primary side of the transformer in a first time period, and guiding the first clamping capacitor and the second clamping capacitor to be connected in parallel and then discharge to the primary side of the transformer in a second time period.

Description

technical field [0001] The invention relates to a switching power supply, in particular to a switching power supply and electronic equipment. Background technique [0002] Switching power supplies are widely used in alternating current-direct current (AC / DC) and direct current-direct current (DC / DC) conversion, and provide insulation isolation between the input side and the output side. For example flyback switching power supply or forward switching power supply. [0003] In the related art, a transformer and an active clamping circuit can be provided in the switching power supply, and the leakage inductance energy of the transformer can be stored in the active clamping circuit through the clamping capacitor and sent back to the transformer. [0004] However, when using the existing active clamp circuit, it is easy to cause the problem of excessive current in the clamp switch in the active clamp circuit and / or the output diode connected to the secondary side of the transfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28H02M3/335H02M1/32
CPCH02M3/28H02M3/33569H02M1/32H02M1/0058H02M1/322Y02B70/10H02M1/342H02M3/33507H02M1/0032H02M1/0006H02M1/34H02M3/33561H02M3/33576
Inventor 郭春明邱治维张程龙
Owner HUAYUAN SEMICON SHENZHEN LTD
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