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:
Transformer，High Frequency Transformer，Frequency Transformer
Popular recommended products
200-500W Switching Power Supply
2020-08-2924-65W Switching Power Supply
2020-08-2912V2ASwitching Power Supply
2020-08-28MKD-571202000 ADAPTER AC ADAPTER CE ADAPTOR UL ADAPTOR Linear Adapter
2020-08-28MKA-571652420 ADAPTER AC ADAPTER CE ADAPTOR UL ADAPTOR Linear Adapter
2020-08-28EI-66 ADAPTER LINEAR ADAPTOR SWITCHING ADAPTOR Linear Power Adapter Linear Adapter
2020-08-28EI-57 ADAPTER LINEAR ADAPTOR Linear Power Adapter Switching Power Adapter INTERCHANGEABLE ADAPTOR Li
2020-08-28EI-48 ADAPTER LINEAR ADAPTOR Switching Power Adapter INTERCHANGEABLE ADAPTOR Linear Adapter
2020-08-28EI-41 ADAPTER AC ADAPTER LINEAR ADAPTOR SWITCHING ADAPTOR Linear Adapter
2020-08-28EI-35 ADAPTER AC ADAPTER SWITCHING ADAPTOR Linear Power Adapter Linear Adapter
2020-08-28ER42 High Frequency Transformer
2020-08-2712-36W POE POWER SUPPLY
2020-08-27Transformer,Power Transformer,Ring Power Transformer
2020-08-27Transformer，High Frequency Transformer，Frequency Transformer
2020-08-2712-24W Medical Switching Power Supply
2020-08-273-12W Medical Switching Power Supply 3W Switching Power Supply 12W Power Supply
2020-08-2745W PD Charger,45W Charger,PD Charger
2020-08-2736-90W Charger,36W Charger,90W Charger,40W Charger,50W Charger
2020-08-2724W USB Charger,24W Charger,USB Charger
2020-08-2724W 2USB Charger,24W Charger ,2USB Charger
2020-08-2710-24W Charger,24W Charger,10W Charger
2020-08-2730-500W LED Power Supply 30-500W Power Supply
2020-08-27Related Information
How to connect the three-plug power cord and what are the precautions for connecting the three-plug
2021-05-27What are the precautions for connecting the three-plug power cord
2021-05-26How to connect the three-plug power cord and what are the precautions for connecting the three-plug
2021-05-26How to identify the quality of the power cord
2021-05-26Power cord with fuse plug
2021-05-25Power cord plug safety certification tips
2021-05-25The cause of the power cord plug heating
2021-05-24The composition of the power cord
2021-05-24What is the working principle of switching power supply?
2020-07-02What is the power adapter?
2020-07-02Popular recommended products
MKD-571202000 ADAPTER AC ADAPTER CE ADAPTOR UL ADAPTOR Linear Adapter
2020-08-283-100W PCBA power supply 3-100W Customized power supply 3-100W power supply
2020-08-273-15W Switching Power Supply
2020-08-2824V1.5A 36W Switching Power Supply
2020-08-29ER42 High Frequency Transformer
2020-08-2724W USB Charger,24W Charger,USB Charger
2020-08-27EI-48 ADAPTER LINEAR ADAPTOR Switching Power Adapter INTERCHANGEABLE ADAPTOR Linear Adapter
2020-08-28MKS-120200EU-36 Switching Power Supply
2020-08-2972-200W Switching Power Supply
2020-08-2924-65W Medical Switching Power Supply
2020-08-27EI-35 ADAPTER AC ADAPTER SWITCHING ADAPTOR Linear Power Adapter Linear Adapter
2020-08-2812W CAR CHARGER,12W USB CAR CHARGER,CAR CHARGER,12W CHARGER
2020-08-2736-65W Switching Power Supply
2020-08-29MK-C1806028 MKA ADAPTER LINEAR ADAPTOR SWITCHING ADAPTOR Linear Power Adapter Linear Adapter
2020-08-2840W 4USB Charger,40W Charger,4USB Charger
2020-08-273-12W Medical Switching Power Supply 3W Switching Power Supply 12W Power Supply
2020-08-2724-65W Switching Power Supply
2020-08-2910-24W Charger,24W Charger,10W Charger
2020-08-2730-500W LED Power Supply 30-500W Power Supply
2020-08-2724W 2USB Charger,24W Charger ,2USB Charger
2020-08-27MKS-1201250HEU Switching Power Supply
2020-08-2930W PD Charger,30W Charger,PD Charger
2020-08-27MKS-120200BS-36 Switching Power Supply
2020-08-2924V21A LED Power Supply 24V Power Supply 21A Power Supply
2020-08-273-8W Charger,3W Charger,8W Charger,4W Charger,5W Charger,6W Charger,7W Charger
2020-08-27500W Charger,Charger
2020-08-28Transformer,Power Transformer,Ring Power Transformer
2020-08-2712VDC8A 96W power supply
2020-08-2845W PD Charger,45W Charger,PD Charger
2020-08-2712W 2USB Charger,2USB Charger,12W Charger,USB Charger
2020-08-27