Unlock instant, AI-driven research and patent intelligence for your innovation.

Control circuit and method for synchronous rectifier in full-bridge rectifying circuit

A synchronous rectifier and full-bridge rectifier technology, applied in control/regulation systems, conversion of DC power input to DC power output, and conversion of AC power input to DC power output, etc., can solve problems such as complex costs

Active Publication Date: 2012-11-28
JIANGSU ZHAONENG ELECTRONICS
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both methods suffer from complex and / or costly disadvantages

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Control circuit and method for synchronous rectifier in full-bridge rectifying circuit
  • Control circuit and method for synchronous rectifier in full-bridge rectifying circuit
  • Control circuit and method for synchronous rectifier in full-bridge rectifying circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.

[0021] The invention provides a driving method for a full-bridge synchronous rectifier. The full-bridge synchronous rectification circuit using this driving method is as follows: Figure 4 shown. The DC-DC converter of the full-bridge synchronous rectification includes a primary circuit 20 and a secondary circuit 30, a transformer T100 coupling the primary circuit 20 and the secondary circuit 30, and the primary circuit includes a DC voltage source 21, a switch circuit 22, a transformer The primary winding 23, the secondary circuit includes the secondary winding 31 of the transformer, the first switching device Q201 coupled with the secondary winding 31 of the transformer, the second switching device Q202, the third switching device Q203 and the fourth switching device Q204, and the sec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a driving circuit for a synchronous rectifier in a full-bridge rectifying circuit and a method for controlling the driving circuit. The invention adopts a DC-DC (direct-current-direct-current) converter which comprises a primary side circuit and a secondary side circuit, wherein the primary side circuit comprises an input voltage source, a power switch device, a PWM (Pulse-Width Modulation) controller and a transformer for coupling the primary side circuit and the secondary side circuit, and the secondary side circuit comprises a synchronous rectifying power switch device, the driving circuit for the synchronous rectifier and an output filtering circuit which are in full-bridge connection with one another. The invention provides the driving circuit for the synchronous rectifier in a full-bridge rectifying topology, which is simple in structure, low in cost and superior in performance, and the control method, thereby greatly improving the practicability of the full-bridge synchronous rectifying topology. The references are as follows: the United States Patent No.: 6, 563, 726B1 May 13, 2008 'Synchronous Bridge Rectifier'; and the United States Patent No.: 6, 111, 769 Aug.29, 2000 'External Driving Circuit For Bridge Type Synchronous Rectification'.

Description

technical field [0001] The invention relates to the field of switching power supplies, in particular to a control circuit and method for a synchronous rectifier in a DC-DC full-bridge rectifier converter. Background technique [0002] Synchronous rectification technology is a very important new technology in modern power supply design. In the traditional power topology, power MOSFETs are used to replace rectifier diodes to reduce rectification losses and improve the efficiency of voltage converters. When a power MOSFET is used as a rectifier, the gate voltage must be synchronized with the phase of the rectified voltage, so it is called synchronous rectification. [0003] In recent years, with the development of electronic technology, especially the rapid increase of data processing and transmission speed, the requirements for the power and power density of the power supply are constantly rising, making improving the efficiency of the converter the key to achieving high powe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02M3/335H02M7/217
CPCY02B70/1475Y02B70/10
Inventor 魏槐秦卫锋
Owner JIANGSU ZHAONENG ELECTRONICS
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com