home > News > Products Information

What is the working principle of switching power supply?

source:Products Information     Popular:adapter     release time:2020-07-02 16:53:16     Article author:小编    

Compared with the linear power supply, the more effective working process of the PWM switching power supply is achieved by "chopping", that is, cutting the input DC voltage into a pulse voltage whose amplitude is equal to the amplitude of the input voltage.

The duty cycle of the pulse is adjusted by the controller of the switching power supply. Once the input voltage is chopped into an AC square wave, its amplitude can be increased or decreased by the transformer. The output voltage value can be increased by increasing the number of secondary windings of the transformer. Finally, these AC waveforms are rectified and filtered to obtain a DC output voltage.

The main purpose of the controller is to keep the output voltage stable, and its working process is very similar to the linear controller. That is to say, the functional blocks, voltage reference and error amplifier of the controller can be designed to be the same as the linear regulator. The difference between them is that the output of the error amplifier (error voltage) passes through a voltage/pulse width conversion unit before driving the power tube.

Switching power supplies have two main operating modes: forward conversion and boost conversion. Although the layout of their parts is very different, but the working process is very different, and each has its own advantages in specific applications.


Read recommendations:

100-300W Charger,100W Charger,200W Charger,300W Charger

36-90W Charger,36W Charger,90W Charger,40W Charger,50W Charger

24V1.5A 36W Switching Power Supply

The composition of the power cord

How to connect the three-plug power cord and what are the precautions for connecting the three-plug

Popular recommended products

19V2A 36W Switching Power Supply

2020-08-28

MKS-1202000-36 Switching Power Supply

2020-08-29

24-36W Charger,36W Charger,24W Charger,30W Charger

2020-08-27

100-300W Charger,100W Charger,200W Charger,300W Charger

2020-08-27

MK-C1806028 MKA ADAPTER LINEAR ADAPTOR SWITCHING ADAPTOR Linear Power Adapter Linear Adapter

2020-08-28

EI-48 ADAPTER LINEAR ADAPTOR Switching Power Adapter INTERCHANGEABLE ADAPTOR Linear Adapter

2020-08-28

24V21A LED Power Supply 24V Power Supply 21A Power Supply

2020-08-27

EI-41 ADAPTER AC ADAPTER LINEAR ADAPTOR SWITCHING ADAPTOR Linear Adapter

2020-08-28

500W Charger,Charger

2020-08-28

12-36W POE POWER SUPPLY

2020-08-27

EI-57 ADAPTER LINEAR ADAPTOR Linear Power Adapter Switching Power Adapter INTERCHANGEABLE ADAPTOR Li

2020-08-28

Inductance & Coil

2020-08-27

72-200W Switching Power Supply

2020-08-29

3-8W Charger,3W Charger,8W Charger,4W Charger,5W Charger,6W Charger,7W Charger

2020-08-27

24V1.5A 36W Switching Power Supply

2020-08-29

24-65W Switching Power Supply

2020-08-29

3-100W PCBA power supply 3-100W Customized power supply 3-100W power supply

2020-08-27

QC3.0 24W USB Charger,24W USB Charger,24W USB Charger,USB Charger

2020-08-27

30W PD Charger,30W Charger,PD Charger

2020-08-27

EI Power Transformer Power Transformer

2020-08-27

36-90W Charger,36W Charger,90W Charger,40W Charger,50W Charger

2020-08-27

36-65W Switching Power Supply

2020-08-29

60W 6USB Charger,60W Charger,6USB Charger,Charger

2020-08-27

12VDC8A 96W power supply

2020-08-28

MKS-1203000EX Switching Power Supply

2020-08-29

24W USB Charger,24W Charger,USB Charger

2020-08-27

3-12W Medical Switching Power Supply 3W Switching Power Supply 12W Power Supply

2020-08-27

12W CAR CHARGER,12W USB CAR CHARGER,CAR CHARGER,12W CHARGER

2020-08-27

MKD-571202000 ADAPTER AC ADAPTER CE ADAPTOR UL ADAPTOR Linear Adapter

2020-08-28

EI-28 AC ADAPTER LINEAR ADAPTOR Linear Power Adapter Switching Power Adapter Linear Adapter

2020-08-28
Copyright 2020 © Merryking Technology Co., Ltd. All rights reserved