source:Industry News Popular:adapter release time:2021-12-29 13:44:21 Article author:sznbone
Take a 5V4A power adapter as an example. From the label, its specifications are basically the same. Sometimes low-end ones may indicate more things, such as a standard power supply, maybe it is CE, FCC, etc. It's all marked up. First of all, we look at the material of the shell. Even if the high-end power supply has a biting appearance, its texture and brightness are different, and it is brighter, because it is injection molded from a brand-new fireproof plastic material. And the low-end appearance does not look shiny, gray and gray. Because it is made of recycled plastic, the price of raw materials is also several times different.
Secondly, you can look at the material and plating of the metal part. The exposed metal of many high-end power supplies is nickel-plated copper, or the plating thickness is thicker and the brightness is relatively high, because high-end power adapters have to pass the salt spray test. Therefore, we sometimes find that mobile phone chargers bought for a few dollars outside will rust soon on the plug, while the original chargers of brand mobile phones will not rust after a long time. Of course, from the appearance, you can also see the label material, wire material and other places. You can see the difference between high-end power adapters and low-end power adapters. However, some manufacturers may only spend the cost on the appearance, and the interior is particularly poor. This can only be seen by dissecting the inside of the power adapter.
If you know something about electronics, you can dissect the power adapter. Low-end power adapters and chargers generally use a triode solution. This is a common name, but in fact it is a professionally called RCC circuit. It does not have an integrated IC. Control is just the self-oscillation of the transformer and the transistor. Some very low-end chargers even only have a rectifier diode, and then there may be no filter capacitor behind, or a small 2.2UF capacitor. There is also no photoelectric coupling element and voltage regulator IC 431. There is also no fuse in the front. Such an ultra-low-grade power adapter composed of about ten components has no safety guarantee and has high radiation, which poses a threat to human health. Not to mention some protection functions for the electrical appliances and the power supply itself.
The high-end power adapter has a current fuse input, a bridge rectifier composed of four diodes or a bridge stack, and a large input filter capacitor. And there are EMI anti-electromagnetic interference components to minimize radiation. The power supply is controlled by the IC, and the feedback is controlled by the primary PSRIC or the photoelectric coupling and voltage regulator 431 in the secondary feedback mode to make the power adapter work stably. The power adapter complies with safety regulations, and each component has safety considerations. The overall power adapter has passed safety certifications, such as UL, CE, CCC, etc. The circuit has built-in protection functions such as overvoltage, overcurrent, overload, short circuit, etc., which can better protect the electrical appliances and the power adapter itself, and make the life of the electrical appliances and the power supply longer.
So don't just look at the price difference when purchasing power adapters. You get what you pay for. High-quality power adapters are naturally more expensive.
Read recommendations:
MKD-571202000 ADAPTER AC ADAPTER CE ADAPTOR UL ADAPTOR Linear Adapter
VDE certified plug power cord can be used in which countries in the EU
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
What are the conditions of use and maintenance methods for switching power supplies?
2022-05-21Some Frequently Asked Questions about Power Adapters
2022-05-20How to deal with the electromagnetic interference of switching power supply which is difficult in EM
2022-05-19Six situations and solutions that cause the whistling of switching power supplies.power supply price
2022-05-18Lightning Surge Test Method for Switching Power Adapters.adapter factory
2022-05-17Two common power adapter output overload protection methods.ADAPTOR price
2022-05-16Common fault maintenance skills of switching power supply
2022-05-14How should we choose the charger?
2022-05-13Power adapter expertise.CE ADAPTOR
2022-05-12How to solve the high temperature rise of switching power supply transformer?
2022-05-11The role of varistor in switching power supply
2022-05-10Structural characteristics and working principle of varistor
2022-05-09The role of varistor in switching power supply
2022-05-09What are the main components of switching power supply
2022-05-07Two ways for MOS devices to dissipate in high-power power supplies,CE ADAPTOR Processing
2022-05-06Several common insulation protection technologies for power adapters
2022-05-05What are the unique advantages of high frequency switching power adapter
2022-04-27What are the main components of switching power supply.China cnc plastic cutting
2022-04-26Troubleshooting method of switching power supply,CE ADAPTOR wholesale
2022-04-25How to use the power adapter correctly
2022-04-23What is the comparison between a charger and an adapter?
2022-04-23The optimal solution of drone power management solution!
2022-04-22Several common insulation protection technologies for power adapters
2022-04-21What are the unique advantages of high frequency switching power adapter
2022-04-20General Mechanism Analysis of Switching Power Adapter.ac power adapter wholesaler
2022-04-19Suppression method of low frequency ripple of switching power supply
2022-04-16Why is the power adapter making noise?
2022-04-15When the power adapter is in normal use, what is the normal temperature?
2022-04-1490% of people use the car charger incorrectly, are you using it right?CAR POWER SUPPLY sales
2022-04-13The difference between a power adapter and a voltage regulator
2022-04-12Popular recommended products
500W Charger,Charger
2020-08-28MKD-571202000 ADAPTER AC ADAPTER CE ADAPTOR UL ADAPTOR Linear Adapter
2020-08-2824W 2USB Charger,24W Charger ,2USB Charger
2020-08-27MKS-1201250HEU Switching Power Supply
2020-08-2912W CAR CHARGER,12W USB CAR CHARGER,CAR CHARGER,12W CHARGER
2020-08-27QC3.0 24W USB Charger,24W USB Charger,24W USB Charger,USB Charger
2020-08-27Inductance & Coil
2020-08-27MK-C1806028 MKA ADAPTER LINEAR ADAPTOR SWITCHING ADAPTOR Linear Power Adapter Linear Adapter
2020-08-2836-65W Switching Power Supply
2020-08-2912V2ASwitching Power Supply
2020-08-2824V1.5A 36W Switching Power Supply
2020-08-2924-36W Charger,36W Charger,24W Charger,30W Charger
2020-08-2740W 4USB Charger,40W Charger,4USB Charger
2020-08-273-8W Charger,3W Charger,8W Charger,4W Charger,5W Charger,6W Charger,7W Charger
2020-08-2730-500W LED Power Supply 30-500W Power Supply
2020-08-2736-90W Charger,36W Charger,90W Charger,40W Charger,50W Charger
2020-08-2724-65W Medical Switching Power Supply
2020-08-2772-200W Switching Power Supply
2020-08-2945W PD Charger,45W Charger,PD Charger
2020-08-2730W PD Charger,30W Charger,PD Charger
2020-08-2712W POWER SUPPLY,12W CAR POWER SUPPLY,POWER SUPPLY,CAR POWER SUPPLY
2020-08-273-12W Medical Switching Power Supply 3W Switching Power Supply 12W Power Supply
2020-08-2712VDC8A 96W power supply
2020-08-2818-25W Switching Power Supply
2020-08-28MKS-1203000EX Switching Power Supply
2020-08-29EI-35 ADAPTER AC ADAPTER SWITCHING ADAPTOR Linear Power Adapter Linear Adapter
2020-08-28EI-48 ADAPTER LINEAR ADAPTOR Switching Power Adapter INTERCHANGEABLE ADAPTOR Linear Adapter
2020-08-28EI-28 AC ADAPTER LINEAR ADAPTOR Linear Power Adapter Switching Power Adapter Linear Adapter
2020-08-28ER42 High Frequency Transformer
2020-08-2724W USB Charger,24W Charger,USB Charger
2020-08-27