home > News > Industry News

Lightning Surge Test Method for Switching Power Adapters.adapter factory

source:Industry News     Popular:adapter     release time:2022-05-17 10:42:04     Article author:yu    

Lightning Surge Test Method for Switching Power Adapters.adapter factory(图1)

  Summary of EMI interference sources for LED switching power supplies

  LED switching power supplies are currently widely used in lighting, industry and communication fields. However, in the process of application and debugging, EMI interference is still one of the more common problems. So, where is the source of this kind of interference that causes headaches for engineers?

  LED switching power supply is a popular switching power supply type in recent years. Once EMI interference occurs during the debugging process, the interference problem is mainly composed of internal and external parts. The internal interference is concentrated in the power switch tube, rectifier diode, high-frequency transformer and other components. The external environment interference mainly comes from the jitter of the power grid, lightning strikes, and external radiation. Next, we will analyze one by one.

  First of all, let's look at the EMI interference problem caused by the power switch tube. During the operation of the LED power supply, the power switch tube works in the state of On-Off rapid cyclic conversion, and both dv/dt and di/dt are changing rapidly. Therefore, the power switch tube is not only the main source of interference for electric field coupling, but also the source of magnetic field coupling. main source of interference.

  And high-frequency transformers will also produce large EMI interference problems. On the premise that the switching power supply is turned on, the EMI source of the high-frequency transformer is mainly reflected in the rapid cyclic transformation of di/dt corresponding to the leakage inductance.

  The rectifier diode is also one of the problem parts that generate EMI interference internally. In the case of normal turn-on, the EMI source of the rectifier diode is concentrated in the reverse recovery characteristics. Stray inductances, etc. produce high dv/dt, resulting in strong EMI. In addition, the PCB is also one of the parts that cause EMI interference inside the switching power supply. To be precise, the PCB is the coupling channel of the above-mentioned interference sources. The quality of the PCB will directly correspond to the quality of the above-mentioned EMI source suppression. .


Read recommendations:

12-36W POE POWER SUPPLY

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

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

The main purpose and function of the power adapter!power adapter Factory

PD power adapter manufacturer, reveal the price chaos of PD power for you

Related Information

What are the conditions of use and maintenance methods for switching power supplies?

2022-05-21

Some Frequently Asked Questions about Power Adapters

2022-05-20

How to deal with the electromagnetic interference of switching power supply which is difficult in EM

2022-05-19

Six situations and solutions that cause the whistling of switching power supplies.power supply price

2022-05-18

Lightning Surge Test Method for Switching Power Adapters.adapter factory

2022-05-17

Two common power adapter output overload protection methods.ADAPTOR price

2022-05-16

Common fault maintenance skills of switching power supply

2022-05-14

How should we choose the charger?

2022-05-13

Power adapter expertise.CE ADAPTOR

2022-05-12

How to solve the high temperature rise of switching power supply transformer?

2022-05-11

The role of varistor in switching power supply

2022-05-10

Structural characteristics and working principle of varistor

2022-05-09

The role of varistor in switching power supply

2022-05-09

What are the main components of switching power supply

2022-05-07

Two ways for MOS devices to dissipate in high-power power supplies,CE ADAPTOR Processing

2022-05-06

Several common insulation protection technologies for power adapters

2022-05-05

What are the unique advantages of high frequency switching power adapter

2022-04-27

What are the main components of switching power supply.China cnc plastic cutting

2022-04-26

Troubleshooting method of switching power supply,CE ADAPTOR wholesale

2022-04-25

How to use the power adapter correctly

2022-04-23

What is the comparison between a charger and an adapter?

2022-04-23

The optimal solution of drone power management solution!

2022-04-22

Several common insulation protection technologies for power adapters

2022-04-21

What are the unique advantages of high frequency switching power adapter

2022-04-20

General Mechanism Analysis of Switching Power Adapter.ac power adapter wholesaler

2022-04-19

Suppression method of low frequency ripple of switching power supply

2022-04-16

Why is the power adapter making noise?

2022-04-15

When the power adapter is in normal use, what is the normal temperature?

2022-04-14

90% of people use the car charger incorrectly, are you using it right?CAR POWER SUPPLY sales

2022-04-13

The difference between a power adapter and a voltage regulator

2022-04-12

Popular recommended products

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

2020-08-28

Transformer,Power Transformer,Ring Power Transformer

2020-08-27

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

2020-08-28

18-25W Switching Power Supply

2020-08-28

EI Power Transformer Power Transformer

2020-08-27

24V1.5A 36W Switching Power Supply

2020-08-29

MKS-1202000-36 Switching Power Supply

2020-08-29

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

2020-08-27

200-500W Switching Power Supply

2020-08-29

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

2020-08-27

MKS-1201250HEU Switching Power Supply

2020-08-29

12VDC8A 96W power supply

2020-08-28

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

2020-08-27

24W 2USB Charger,24W Charger ,2USB Charger

2020-08-27

MKS-1203000EX Switching Power Supply

2020-08-29

3-15W Switching Power Supply

2020-08-28

12W 2USB Charger,2USB Charger,12W Charger,USB Charger

2020-08-27

12-36W POE POWER SUPPLY

2020-08-27

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

2020-08-28

45W PD Charger,45W Charger,PD Charger

2020-08-27

500W Charger,Charger

2020-08-28

72-200W Switching Power Supply

2020-08-29

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

2020-08-27

Inductance & Coil

2020-08-27

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

2020-08-27

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

2020-08-27

24W USB Charger,24W Charger,USB Charger

2020-08-27

12W POWER SUPPLY,12W CAR POWER SUPPLY,POWER SUPPLY,CAR POWER SUPPLY

2020-08-27

ER42 High Frequency Transformer

2020-08-27

12-24W Medical Switching Power Supply

2020-08-27
Copyright 2020 © Merryking Technology Co., Ltd. All rights reserved