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

A noise reduction type isolated high frequency square wave dc-dc power supply

A DC-DC, isolated technology, applied in the field of micro power supply, which can solve the problems of unreliable output level, low transmission performance, and distortion of output waveform.

Active Publication Date: 2018-01-12
SHENZHEN FLYPOWER TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned prior art, the purpose of the present invention is to provide a noise reduction type isolated high-frequency square wave DC-DC power supply, which aims to solve the problem that the existing square wave power supply is susceptible to coil electromagnetic noise interference, the output waveform is distorted, and the transmission Issues such as low performance and unreliable output levels

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
  • A noise reduction type isolated high frequency square wave dc-dc power supply
  • A noise reduction type isolated high frequency square wave dc-dc power supply
  • A noise reduction type isolated high frequency square wave dc-dc power supply

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] image 3 Transmission waveform diagram for the specific implementation of the present invention, the power supply input terminal 1 is connected to the original wave, and after passing through the primary winding of the coil device 2, a small electromagnetic noise perturbation appears in the waveform, but when it is converted to the secondary winding of the coil device 2 After the output, the transition waveform 8 has a large noise disturbance, and the second half of the transition waveform 8 is completely noise disturbance, and is opposite to the level parameter of the effective waveform 9, forming a waveform 8 similar to a trigonometric function with glitches. Without noise reduction, the output waveform will be greatly distorted. The first switch S1 and the second switch S2 are turned on through the input feedback timing unit, so that the effective waveform 9 is output. After a certain period of time, the first switch S1 and the second switch S2 are turned off, the t...

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 noise reduction type isolated high-frequency square wave DC-DC power supply, the invention relates to the field of micro power supplies, which aims to solve the problem that the existing square wave power supply is susceptible to coil electromagnetic noise interference, the output waveform is distorted, the transmission performance is low and the output Level unreliable and other technical issues. The circuit structure of the invention features a power input terminal connected to the primary winding of the coil device, a noise reduction module connected to the secondary winding of the coil device, and a Schmitt trigger connected to the noise reduction module. The invention is used for power noise reduction.

Description

technical field [0001] The invention relates to the field of micro power supplies, in particular to a noise reduction type isolated high frequency square wave DC-DC power supply. Background technique [0002] In the power supply design, the power input terminal is usually isolated from the external circuit to protect the power supply from the influence of the external circuit. There are two common methods of isolation: optical coupling and electromagnetic isolation. Optical coupling has problems such as LED aging and limited transmission frequency, making electromagnetic isolation a better coupling method. Electromagnetic isolation has the characteristics of high speed, low power consumption and high reliability. However, in the existing electromagnetic isolated micro power supply, when the input voltage is small, the various electromagnetic interferences received by the micro power supply cannot be ignored, resulting in output waveform distortion and output instability. ...

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): H02M3/28H02M1/44H02M1/14
Inventor 吴献军邱南阳邹永标
Owner SHENZHEN FLYPOWER TECH