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

Method and apparatus for efficient switching in a semi-resonant power converter

A technology of converter and voltage converter, which is applied in the direction of output power conversion device, DC power input conversion to DC power output, high-efficiency power electronic conversion, etc. It can solve the problem of proportional increase in the number of power switches, increased loss, high loss, etc. question

Active Publication Date: 2019-12-31
INFINEON TECH AUSTRIA AG
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Larger switching devices generally have higher losses associated with their control, and increasing the number of power switches increases this loss proportionally

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
  • Method and apparatus for efficient switching in a semi-resonant power converter
  • Method and apparatus for efficient switching in a semi-resonant power converter
  • Method and apparatus for efficient switching in a semi-resonant power converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Embodiments described herein serve to reduce power losses associated with synchronous switching within a resonant or semi-resonant DC-DC power converter, thereby providing a DC-DC power converter with higher energy efficiency. Of particular interest are transformer / tapped inductor based power converter topologies that allow high voltage conversion ratios without the need for isolation. One such topology uses switches known as synchronous rectification (SR) switches to couple the transformer / tapped inductor to ground. Due to its ability to support high voltage conversion ratios, this topology is particularly suitable for applications that require output power supplies that deliver relatively low voltages and relatively high currents. This large current must also flow through the aforementioned SR switch, and doing so may result in significant power loss caused by the conduction resistance of the SR switch.

[0026] Embodiments described herein minimize the aforementione...

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

A voltage converter includes a power stage, passive circuitry, synchronous rectification (SR) switching components, and control circuitry. Passive circuitry couples the power stage to the output node of the voltage converter and switchably couples to ground through the SR switching element. The SR switch section includes a plurality of independently controllable SR switches. The control circuit determines which SR switches are to be activated / enabled and only uses those switches in variable switching of the voltage converter. The determination of which SR switches to activate / enable is based on an estimate of the output current of the voltage converter. By using more SR switches when the voltage converter is fully loaded and fewer SR switches when the voltage converter is lightly loaded, the power loss of the SR switching components is minimized and the voltage converter is more energy efficient.

Description

technical field [0001] The present application relates to semi-resonant and resonant converters and, in particular, to efficient techniques for switching current in such converters by adapting multiple switching devices for switching. Background technique [0002] Resonant and semi-resonant DC-DC converters, including isolated and non-isolated topologies, are used in a wide variety of applications including telecommunications, consumer electronics, computer power supplies, and more. The use of such converters has grown in popularity due to their zero-voltage (current) switching characteristics and their ability to exploit parasitic elements inherent in electronic circuits. Among the many topologies, the semi-resonant converter with transformer / tapped inductor is an attractive topology that provides high voltage conversion ratio without using isolation. Compared to other solutions, this converter offers advantages including lower cost and higher efficiency. [0003] A semi-...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155H02M1/088
CPCH02M1/088H02M3/155H02M1/0048H02M1/0032H02M1/0009H02M3/01H02M3/33571H02M3/285H02M3/33592Y02B70/10H02M3/33576H02M1/08H02M3/33507
Inventor A·巴巴扎德赫R·卡罗尔
Owner INFINEON TECH AUSTRIA AG