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: 2021-05-25
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 present invention provides a switching power supply and electronic equipment, including: an active clamping circuit and a transformer, the active clamping circuit includes a first clamping capacitor and a second clamping capacitor, characterized in that the active The clamping circuit further includes: a path guiding module; the path guiding module is respectively connected to both ends of the first clamping capacitor and both ends of the second clamping capacitor; the path guiding module, the first Both the clamping capacitor and the second clamping capacitor are directly or indirectly connected to the primary side of the transformer; the path guiding module is used to guide the first clamping capacitor and the second clamping capacitor to The capacitors respectively obtain electric energy from different positions on the primary side of the transformer; in a second time period, the first clamping capacitor is guided to be connected in parallel with the second clamping capacitor to discharge the primary side of the transformer.

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 Patents(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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