• You can log in to your eeworld account to continue watching:
  • Principle and maintenance of switching power supply
  • Login
  • Duration:1 minutes and 59 seconds
  • Date:2017/04/12
  • Uploader:老白菜
Introduction
Switching power supply is an indispensable circuit for many electrical appliances. Do you have an in-depth understanding of its working principle during maintenance? I hope you may wish to carefully watch this video tutorial on the principle and maintenance of switching power supply provided by this site. Encyclopedia: A switching power supply is a power supply that uses modern power electronics technology to control the turn-on and turn-off time ratio of the switch tube to maintain a stable output voltage. The switching power supply is generally composed of a pulse width modulation (PWM) control IC and a MOSFET. Compared with switching power supplies and linear power supplies, the cost of both increases with the increase in output power, but the growth rates are different. At a certain output power point, the cost of linear power supplies is higher than that of switching power supplies. This point is called the cost reversal point. With the development and innovation of power electronics technology, switching power supply technology is also constantly innovating. This cost reversal point is increasingly moving to the low-output power end, which provides a broad development space for switching power supplies.

With the rapid development of power electronics technology, power electronic equipment is increasingly closely related to people's work and life, and electronic equipment is inseparable from reliable power supply. In the 1980s, computer power supplies fully realized switching power supply, taking the lead in completing the development of computers. In the 1990s, switching power supplies have entered various electronic and electrical equipment fields. Program-controlled switches, communications, electronic testing equipment power supplies, control equipment power supplies, etc. have widely used switching power supplies, which has promoted the rapid development of switching power supply technology. . Switching power supply is a power supply that uses modern power electronics technology to control the turn-on and turn-off time ratio of switching transistors to maintain a stable output voltage. Switching power supplies are generally composed of pulse width modulation (PWM) control ICs and MOSFETs. Compared with switching power supplies and linear power supplies, the cost of both increases with the increase in output power, but the growth rates are different. At a certain output power point, the cost of linear power supply is higher than that of switching power supply, which is the cost reversal point. With the development and innovation of power electronics technology, switching power supply technology is constantly innovating. This cost reversal point is increasingly moving to the low-output power end, which provides a wide range of development space for switching power supplies.

High frequency of switching power supply is the direction of its development. High frequency makes switching power supply miniaturized and allows switching power supply to enter a wider range of application fields, especially in high-tech fields. It promotes the miniaturization and lightweight of high-tech products. change. In addition, the development and application of switching power supplies are of great significance in saving energy, saving resources and protecting the environment.

There are two types of modern switching power supplies: one is DC switching power supply; the other is AC switching power supply. What is mainly introduced here is only the DC switching power supply. Its function is to convert the original power supply (coarse power) with poor power quality, such as mains power or battery power, into a higher quality DC voltage (fine power) that meets the requirements of the equipment. . The core of the DC switching power supply is the DC/DC converter. Therefore, the classification of DC switching power supplies relies on the classification of DC/DC converters. In other words, the classification of DC switching power supplies is basically the same as the classification of DC/DC converters. The classification of DC/DC converters is basically the classification of DC switching power supplies.

DC DC/DC converters can be divided into two categories according to whether there is electrical isolation between input and output: one type is isolated and is called isolated DC/DC converter; the other type is without isolation and is called non-isolated type. DC/DC converter.

Isolated DC/DC converters can also be classified according to the number of active power devices. There are two types of single-tube DC/DC converters: forward and flyback. Double-tube DC/DC converters include Double-tube Forward Converter, Double-tube Flyback Converter, Push-Pull Converter and Half-Bridge Converter. Four kinds. The four-tube DC/DC converter is a full-bridge DC/DC converter (Full-Bridge Converter).
Unfold ↓

You Might Like

Recommended Posts

Easy Power Learning Sticker
The new SIMPLE SWITCHER Nano Module is ideal for space-constrained applications, expanding the product portfolio and capabilities of the smallest 1A package on the market today. The SIMPLE SWITCHER Na
sssnnn521 Analogue and Mixed Signal
Seeking Knowledge
Can the kindhearted person who has the method of not using CMD55, 8960 and CM U200 send me a copy? My email address is xiaogang725@126.com .Thank you! ! ! ! !
xiaogang725 Test/Measurement
Ask an expert for help: I am making a 51 Gree air conditioner remote control. After decoding the code, I don’t know why the air conditioner doesn’t respond. The program is attached as follows.
#include#define uchar unsigned char #define uint unsigned int sbit output = P1^0; sbit KEY1=P3^0; sbit KEY2=P3^1; sbit KEY3=P3^2; sbit KEY4=P3^3; static bit OP; //On and off of infrared transmitting t
colourfulcc 51mcu
Where can I download nsc logic counter.intlib?
I have been searching for a long time but couldn't find any information about where to download nsc logic counter.intlib. I don't know where I can download it?
雨夜漫步 PCB Design
LM3S615 PWM module
lm3s615 PWM module, 16-bit timer for PWM
yuhua8688 Microcontroller MCU
Recommend a mall for purchasing electronic components: free shipping for new customers’ first order, and also provide services such as sample application and technical support!
There is a global shortage of electronic components nowadays. Where do people purchase the products they need?Recommend a good place to everyoneLiyuan XinchengIf you are purchasing now, you can also p
eric_wang Embedded System

Recommended Content

可能感兴趣器件

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

About Us Customer Service Contact Information Datasheet Sitemap LatestNews


Room 1530, 15th Floor, Building B, No.18 Zhongguancun Street, Haidian District, Beijing, Postal Code: 100190 China Telephone: 008610 8235 0740

Copyright © 2005-2024 EEWORLD.com.cn, Inc. All rights reserved 京B2-20211791 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号