Switching power supplies are a large class, and power adapters are switching power supplies. Switching power supply is based on the internal characteristics of the item, the power adapter is highlighted as the auxiliary of the main equipment.

In the digital age, more and more digital products are crowded around people. These low-voltage products require a power adapter that is larger or smaller, without exception.

Switching power adapters are safer to do this: pulse-by-pulse over-power or over-current limiting, over-power-delayed shutdown protection, flyback overpower limiting protection, and constant power limiting protection.

The quality of the material directly determines the performance of the above characteristics. Choose a power adapter or choose a high-end brand manufacturer like Lianyunda. The quality is assured and the price is affordable.

What information can the power adapter see through the model? The model can know the voltage and current parameters and power and which country plug (wall plug).

Why are the power adapters mostly black? That's because black products have the least thermal resistance and are good for heat dissipation. Shenzhen Lianyunda electronic source factory direct supply, affordable ultra-low price.

The power adapter doesn't look very big, but it contains too much knowledge. Today we will talk to you to enhance your understanding of the power adapter.

Power adapter (notebook charger), when the power supply output current, some adapters sound loud, some sound is small, this is a workmanship difference, rest assured to use.

It is normal for the power adapter to make a sound when it is powered on. If the power adapter makes a loud sound, you need to check the cause carefully.

The appearance of the power adapter will directly affect the final transaction; here Shenzhen Unicom Power Adapter Factory tells you about the appearance check procedure of the power adapter?

Power adapter maintenance method: pulse-by-pulse super power or over current limit, super power delay off protection, flyback super power limit, constant power limit maintenance method.

The voltage is appropriate and the current is not less than the power adapter of the original power supply. The voltage of the power adapter can be used as long as it is higher than the battery voltage of the notebook by 4V or more.

Power adapters have been widely used by us. We often use power adapters. However, there are many misunderstandings. There are certain security risks when used incorrectly.

The high frequency of the power adapter has become its development direction. The high frequency makes the switching power supply miniaturized and the power adapter enters a wider range of applications.

The switching power supply and the adapter are both switching power supplies, which are composed of a high frequency switching tube and its control circuit, and the power adapter is a regulated switching power supply.

With the continuous innovation of portable devices, the ever-changing of smart devices and artificial intelligence, the requirements for power adapters are also increasing. From the appearance of the first generation of shoe boxes to the current 6cm, despite this, it is still unable to get rid of the growing user. Expected value

The life of a typical power adapter will be slightly shorter than the life of an electronic product, especially the connection between the power adapter and the electronics.

Just look for the power adapter to charge, but the results are not suitable, so what is the reason?

There are some precautions when purchasing the original power adapter. For example, the voltage in your country, the applicable model, etc. must first be understood.

How to choose the power adapter manufacturer, this problem is indeed a problem that needs serious consideration for friends who have just contacted the switching power supply. First: very cheap not to choose Explain as follows: power adapter cost = shell injection cost + SMT, AI process

Power adapters for different brands of notebooks have some differences in output interfaces, voltage and current values, and therefore cannot be mixed.

The power adapter is heat radiation, not the heat generated by electromagnetic radiation. The power adapter has good radiation isolation inside and does not produce so-called radiation.

The power adapter is converted from AC to DC, and then through the computer, it can not protect the computer, so it can protect the computer during the power outage.

If the power adapter does not support fast charging, then the output voltage will not reach the standard of fast charging. In other words, the use of dedicated lines, special, special planes, are indispensable.

The power adapter first converts the alternating current through the transformer and then rectifies and filters through the rectifier circuit to obtain an unsteady DC voltage. This power supply technology is mature, can achieve high stability, and the ripple is small, and there is no switching power supply. Interference and noise.

Power adapter is a commonly used power conversion device. It is widely used in electronic communication equipment, notebook computers, game consoles and other electronic products and information equipment. There are many types of power adapters, including AC/AC and AC/DC power converters. Various products

Now that technology is developing rapidly, the speed of updating mobile phones is getting faster and faster. The frequency of changing mobile phones is also increasing. There are always a few unwanted, old and bad power adapters in the house. Many people choose to put them. Throw it aside or throw it away,

The load short-circuit fault of the switching power supply (especially the short circuit or poor function of the DC/DC converter), at this time, should be disconnected from all the load of the switching power supply circuit, so as to distinguish the switching power supply circuit from the load circuit failure. Letter telegram. If the load circuit is disconnected

For the enterprise, product quality is the life of the enterprise, especially electronic products. In terms of power supply, product quality not only affects the performance and service life of the power supply, but also concerns the safety of the power adapter. Inferior power supplies can even cause fire and explosion.

In the self-oscillating converter considered here, the switching action is maintained by the positive feedback of a winding on the main transformer. The frequency is controlled by the drive clamp action, which corresponds to an increase in the field current during conduction. By controlling the amplitude of the primary current cutoff

The physical inspection of the surface of the switching power supply is an important basis for the troubleshooting of the switching power supply. At the same time, the appearance of the switching power supply components, circuit boards, solder joints, etc. Switching power supply defect faults are generally caused by errors in process manufacturing.

LED drive according to the output type is DC output type, divided into constant voltage and constant current two, mostly constant current drive; whether it can drive LED lights, mainly depends on whether the output voltage and current are within the LED bearing range. The power adapter is a regulated power supply, and the LED driver is a constant current power supply.

The flyback unit combines the functions of an isolation transformer, an output inductor, and a freewheeling diode in a transformer. This combination of electromagnetic integration makes the circuit very cost effective and efficient and stable DC output.

The figure shows a method of energy storage and transfer. When SW1 is turned on, the power adapter charges C1 and C2 through resistors R1 and R2, respectively, and their final voltage value will reach the power adapter voltage Vs.

When the notebook is fully charged and the power adapter plug is unplugged, the power adapter will be hot too hot. Although it is not surprising that the notebook power adapter is hot during charging, the temperature of the adapter is too high, and it feels when the plug is pulled. Hot

The power adapter is broken. The first thing we check is to see where the problem occurs. If it is a line fault, we must focus on checking whether the input line and the output line are energized. If the line is damaged, it can be solved by replacing the power line.

Although the mobile phone charger and the power adapter all have the same effect, they are still somewhat different in nature.

Power adapter refers to the external power supply used to convert the AC grid voltage into a fixed, single-channel low-voltage DC or low-voltage AC output voltage. It is widely used in various electrical products, especially information technology equipment, telecommunication terminal equipment and audio and video equipment.

Anyone who has worked on power supply design knows that during the test of the power adapter power supply, some whistling sounds are often heard, similar to the leakage sound emitted when the high voltage is bad, or the sound like a high voltage arc. Why is there a howling?

With the increase of electronic products around us, daily charging has become the norm. When charging, we often have mixed chargers, such as charging the iphone with the Ipad charger. So what impact does this have on the battery of an electronic product?