So how do we use the power adapter reasonably? (1) Prevent the power adapter from being used in a humid environment and prevent water from entering. Even if you put the power adapter on a table or on the ground, be careful not to put wet objects such as drinking glasses around to avoid getting the adapter wet. (2) Avoid using the power adapter in a high temperature environment. In a high temperature environment, many people only pay attention to the heat dissipation of electronic equipment, and often ignore the heat dissipation of the power adapter. In fact, many power adapters generate as much heat as electronic devices such as laptops, phones, and tablets. When in use, the power adapter can be installed in a place that is not exposed to direct sunlight or in a well-ventilated place, and a fan can be used for auxiliary convection heat dissipation. At the same time, the adapter can be turned over, and a small object can be inserted between the adapter and the contact surface to increase the contact surface of the adapter with the surrounding air, enhance airflow, and dissipate heat faster. (3) Use the corresponding power adapter. If you need to replace the original power adapter, you must choose a product that matches the original model. If an adapter that does not meet the specifications and model is used, there may be no problems in a short time, but due to differences in

Power adapters are very common in daily life, and of course there are some common problems, such as noise interference in the adapter. Shenzhen Waweis Technology Co., Ltd. is a professional power supply adapter manufacturer. Let's analyze the power supply for you. Why does the adapter have noise interference: 1. Suppress the EMI generated by the power supply itself; 2. Prevent external electromagnetic noise from interfering with the work of the load of the power supply; 3. Suppresses EMI generated by other equipment and propagated through the power supply. 4. Prevent external electromagnetic noise from interfering with the work of the control circuit of the power supply equipment itself; In addition to the drive circuit, the switching power supply also has a protection circuit, a program circuit, an input and output level detection circuit, etc., and the circuit is quite complex. These circuits are mainly composed of dedicated or general-purpose power supply integrated circuits. An effective way to prevent these circuits from malfuncti

Nowadays, the power adapter has been integrated into our daily life and work. We use it everywhere. If we use it more, there will naturally be problems like this. Today, the editor will introduce the specific analysis and processing methods of the power adapter failure. As follows: Now computers generally use ATX power adapters. When the system fails, a comprehensive analysis should be carried out from the aspects of BIOS, the power adapter itself and the motherboard. According to the principle of "soft first and then hard" in computer maintenance, first check whether the BIOS settings are correct, and eliminate false faults caused by improper settings; the second step, check whether the ATX power supply is normal; the third step, check whether the motherboard power supply monitoring circuit normal. At the same time, when judging whether the power adapter is normal, you can remove the power supply and use a scrapped device (such as hard disk, etc.) as a false load to avoid no-load protection. Connect a 100-150Ω resistor between the PS-ON signal line (green) and the ground line to make the signal low. If the power supply can work, the fault is in the motherboard or BIOS settings, otherwise the fault is in the power supply itself. The power adapter plays the role of the source of power in the computer system. Whether it works normally or not is the key prerequisite for the normal operation of the entire computer system. However, in the routine maintenance process of the computer room, it is found that the power adapt

1. Technology is advancing by leaps and bounds, people's living conditions are getting better and better, and everyone is basically a family. The progress of network technology facilitates us to search for information and materials, Taobao, watching news, etc., and has become indispensable for work, life, leisure, entertainment, etc. The main frequency of notebook computers is changing with each passing day, the LCD screen is getting bigger and bigger, and the power of the notebook power adapter is also increasing, reaching about 100W, which is almost a small desktop power supply! If you touch it with your hands, you might be surprised if you are timid, but you are just a hot potato! It won't catch fire or something? This is the worry of many people! 2. What should I do if the laptop power adapter overheats? It is normal if the heating temperature is constant. The notebook power adapter is actually equivalent to the power box of the desktop computer. The desktop computer has an electric fan, so it is not very hot, but the wind blown out after using it for a long time is still hot. The notebook is completely dissipated by the shell, so the heat is normal. And it will be hotter in summer, as long as the power supply can be normal, as long as the hand can touch it. It can also be placed on the radiator to assist heat dissipation. Today's laptops generally have overheating protection, and overheating will automatically power off protection. 3. Overheating protection circuit of power adapter

In fact, the sizzling sound in the power adapter is the sound of the inductance coil vibrating due to the action of the magnetic field when the alternating current passes through. The inductance coil is generally packaged with enamel, epoxy resin, heat shrink tape, etc. Generally, if the enameled wire is wound and packaged, It can be well sealed to isolate the sound generated by the vibration of the inductive coil. Power Adapter If the sound of the power adapter fluctuates when it is working, it may be that the upstream device of the inductor is short-circuited. In this case, danger may occur, such as a short circuit in a notebook and a spark at the plug. Of course, it is impossible. . First of all, under normal circumstances, when the notebook power adapter is powered on, it will make a faint sizzling sound, which is the sound of electric current. However, if the zigzagging sound is very loud, or it will be loud for a while and then small for a while, it is likely that there is a problem with the equipment. The manufacturer of the power adapter Shenzhen Huawei Electronics Technology Co., Ltd. has summarized two situations for you. 1. The power supply is unstable. The power adapter is actually a transformer. When converting the power supply, it will emit a sound with a fixed frequency. If the power supply is unstable, the sound from the inductance coil will be different. 2. The connection plug of the adapter is not tightly inserted, the connector is too loose, and the contact is poor, resulting in a large resistance, and the sizzling sound will also increase accordingly. 3. The inductor coil is generally packaged by varnish, epoxy resin, heat shrink tape, etc., which can protect the

In the case of overload or short circuit of the power adapter, the temperature increase is a symbolic situation, and attention must be paid to avoid the appearance of a large number of problems. There are a large number of diodes and capacitors inside the adapter. If any of the small parts is short-circuited, the internal power loss will increase, and the heat will also increase. This abnormal working state often causes the product to heat up. If you are not careful, a fire can easily occur. When it is found that the power adapter has serious heat, it can basically be determined that a fault has occurred. If you continue to use it, it will greatly increase the safety hazard. Now, in order to save production costs, some manufacturers often use diodes inside the adapter that are relatively resistant, and the quality of the internal insulating tape will also be relatively poor, and the number of layers is relatively small, the internal temperature is high, and it is easy to deform. This eventually leads to a situation where the thick insulating layer on the outside of the adapter also deforms. Transformer windings can also experience skeleton melting due to increased temperature. As a consumer, when purchasing an adapter, you should carefully check its labeling. If you don`t understand much, you can learn it through the Internet. You must have a correct understanding of the workmanship, power, and voltage of the purchased product. Only the power adapter used with the equipment can meet the standard of use.

We know that some computer power adapters are not universal, but there are very few friends who know the reasons. Today, the power adapter manufacturer will tell you what the three reasons are. The main points are as follows: 1. The size of the output interface of the product is different: the interfaces of most laptop power adapter brands are different, which means that using other brands of power adapters cannot be plugged into your laptop for power supply. It is relatively safe to have different interfaces, because at least you will not plug in a power adapter that does not meet the current or voltage to supply power to the laptop, which will cause damage to the computer hardware; 2. Inconsistent voltage: The voltage of different brands of laptop chargers (power adapters) is inconsistent. Even if the power adapter interface is the same, you cannot use different brands of laptop power adapters for power supply; because the voltage and current are different, the battery life will be damaged. 3. Inconsistent current: Different brands of laptop chargers (power adapters) have different currents. For example, in general, Acer is 3.42A, Dell is 3.334A, Hp is 3.33A, Sony is 4.7A, etc. To sum up: In fact, the voltage and current of the same brand laptop power adapter are not the same. Therefore, even if the power adapter is used between laptops of th

First briefly introduce the application scope of the power adapter Power adapter, whose English name is Power adapter, is a power supply conversion device for small portable electronic equipment and electronic appliances. It is generally composed of a casing, a power transformer and a rectifier circuit. According to the connection method, it can be divided into wall type and desktop type. It is widely used in telephones, game consoles, language repeaters, Walkmans, notebook computers, cellular phones and other equipment. According to the connection method: It can be divided into desktop type and wall type; According to the type of output current: It can be divided into AC output type and DC output type. Widely used in notebook computers, mobile phones, household IT equipment and others. How the power adapter works: In reality, most of the power adapters we come into contact with are switching power supplies. Switching power supply refers to a power supply that controls the time ratio of switching on and off

Low-power mobile phone chargers can charge laptops that support the PD protocol. not recommend High-power PD laptop adapter, charging low-power mobile phones, this is no problem. Take a look at your power adapter, the supported input voltage and current, there are a variety of specifications that can be dynamically adjusted. The PD charger will automatically recognize the charging current of the mobile phone or computer, so as to automatically identify the appropriate voltage group for charging: Voltage: 20V, 15V, 9V, 5V Current: 3.25A, 3A Zda supports 65W (20V / 3.25A and 15V / 3A), and can also support 27W, 15W. The PD charger will automatically adjust the power range in the middle. 18W iPhone, 30W Android, mainstream models can all be charged, just use it with confidence. To put it simply, mobile phone charging and laptop charging involve three factors: charger interface, charger power, and charger protocol. Does the charger have enough charging power? The power of mobile phone chargers is generally around 40W. The possibility of charging the laptop is too small. The laptop charger power i

GaN fast charging and PD fast charging are different concepts! GaN →Gallium Nitride is a third-generation new semiconductor material, which has the characteristics of large forbidden band width, high thermal conductivity, high temperature resistance, radiation resistance, acid and alkali resistance, high strength and high hardness. It was widely used in new energy vehicles, Rail transit, smart grid, semiconductor lighting, and new generation mobile communications are known as the third generation of semiconductor materials. As the cost of technological breakthroughs is controlled, gallium nitride is currently widely used in consumer electronics and other fields, and chargers are one of them. Simply put, GaN has a wider band gap. The wide band gap also means that GaN can withstand higher voltages than silicon and has better conductivity. In the same volume, GaN technology is used for charging. The output efficiency of the charger is higher than that of ordinary chargers. For example, a charging head made of gallium nitride material can achieve more output power when it is about the same size as an Apple 5W charger. From the above we know that gallium nitride is a kind of material, it has nothing to do with the agreement, the current industry development fast charging trend is PD chargers, so most of them will be applied to PD chargers. Using gallium nitride MOS tube chargers, the switching frequency can be increased, and the product volume can be reduced by 30~60% (single-port output) and weight by 20~40% compared with traditional silicon MOS tube chargers. In addition to fast charging heads, where else is GaN used?

Burn in refers to the use of high-temperature methods to impose environmental stress on products, while environmental stress screening (ESS: Environment Stress Screen) includes not only high-temperature stress, but also many other stresses, such as temperature cycling, random vibration, etc., as shown in the figure Show. Therefore, aging is a kind of environmental stress screening. But now many companies have expanded the meaning of the word "aging". Aging is equivalent to environmental stress screening. Environmental stress screening is commonly referred to as aging. We will continue to use the word "aging". Why must electronic products undergo a 100% burn-in test before they leave the factory; Because in the processing of electronic products, due to complex processing and extensive use of components and materials, various defects will be introduced (even if the product is well designed). Whether it is a processing defect or a component defect, it can be divided into obvious defects and latent defects. Obvious defects refer to those defects that cause the product to fail to work normally, such as short circuits/open circuits. Potential defects cause the product to be temporarily usable, but the defects will be quickly exposed during use, and the product will not work properly, such as insufficient solder. Although the product can be used, slight vibration may cause the solder joint to open. Obvious defects can be inspected by conventional inspection methods (ie ICT: In-Circuit Test, In-Circuit Test, which is to check the manuf

Gallium nitride is an inorganic substance with the chemical formula GaN, a compound of nitrogen and gallium, and a direct bandgap semiconductor. The structure of this compound is similar to wurtzite with high hardness. Gallium nitride has a wide energy gap of 3.4 electron volts, which can be used in high-power, high-speed optoelectronic components. Traditional charging heads use semiconductor brick technology. The charging heads designed with this technology are relatively large and generate a relatively large amount of heat. Gallium oxide is a third-generation semiconductor black technology material that is widely used in the aerospace and military fields. The characteristics of high discharge rate and high reliability, used to design and manufacture charging heads, will achieve higher reliability under the condition of reducing heat generation and reducing volume. My MacBook Pro.EOS R6.EOS RP.iPhone 11 Pro MaxDJPocket2.Huawei Mate 40 Prc and many other devices can be recharged with gallium oxide super power. Greatly simplifies the carrying of charging equipment when going out

1. The difference between the charging power of the power supply 2. The difference between power supply equipment and application equipment 3. The difference between the USB interface 4. The communication identification channel of fast charging is different One: The difference between USB interface First of all, QC3.0/QC2.0 protocol can be our common Android Micro-B interface, USB type A interface, or USB type C interface. PD fast charge is a charging protocol belonging to the USB TYPE C interface and can only be used for the USB type C interface. Two: The communication recognition channel of fast charging is inconsistent PD fast charge is not recognized by D+, D- communication protocol. Note: PD fast charge is not recognized by D+, D- communication protocol. PD fast charging is identified by communication via CC pin. QC3.0/QC2.0 is synchronous D+, D- to identify the communication protocol. Micro-B This is also to distinguish between the two fast charging. In the USB type C interface, we know that there

1. Can adapters with the same voltage and different current be used on the same laptop? When the notebook is running at a high load, the incoming current is correspondingly larger, and when the notebook is lightly loaded or in standby, the current is smaller. The power supply with large nominal current has enough current margin. Some people use 45W It is no problem to use the power supply instead of 60W. The reason is that there is some margin in the design of the adapter, and the load power is less than the power of the power supply. Therefore, this kind of representative is feasible in general use. If you connect a lot of high power consumption Equipment, then it is more dangerous, so do not use a small current adapter instead of a large current adapter. 2. Is it normal for sparks to appear on the power adapter plug? If you connect the adapter to the laptop first and then connect the adapter, it is normal to cause sparks during contact at this time. You can avoid it by following the steps below: (1) Turn off the switch of the power socket first. (2) Connect the notebook power adapter to the power socket, and then turn on the socket switch. (3) Connect the DC plug end of the power adapter to the notebook. 3. Is the temperature of the laptop adapter normal? Normally, all laptop chargers, including mobile phone charger

Apple officially released iOS 14.3 and iPadOS 14.3, and made many updates. In addition to being compatible with AirPods Max headsets, the biggest highlight should be the introduction of the new image format ProRAW. However, the eighth and ninth items in the updated list may be ignored by everyone, and did not attract many people`s attention. They are fixing the "device may not be able to charge wirelessly" and the MagSafe dual charger may not be the maximum power for the iPhone. Wireless charging problem. I thought it was a good thing, but after updating 14.3, a large number of third-party magnetic wireless chargers failed. However, not all of this update has been blocked. It is said that some magnetic chargers can still be used. As for whether it will continue to be blocked, it is unknown. According to the person in charge of the industry, most of the third-party magnetic chargers that failed this time were only cracked in the first half of the animation, and the subsequent interaction process was not completely cracked, and the cracking was only optimized for the iOS version at the time. As a result, after the update of 14.3, the battery does not charge after the pop-up window.

On-board chargers refer to conventional on-board chargers powered by car batteries (12V for cars, 24V for trucks), which are widely used in the field of lithium battery charging for various portable and handheld devices. Such as: mobile phones, PDAs, GPS, etc.; car chargers must not only consider the actual needs of lithium battery charging (constant voltage CV, constant current CC, overvoltage protection OVP), but also take into account the harsh environment of the car battery (transient peak voltage, System switching noise interference, EMI, etc.); therefore, the power management IC selected for the car charger solution must also meet: high-voltage, high-efficiency, high-reliability, low-frequency (conducive to EMI design) switching power supply chips. Characteristic Versatility, portability, fashion, safety With the development of the automobile industry, car chargers are widely used, showing the characteristics of versatility, portability, and fashion. Versatility: This car charger is equipped with four AC adapters for American, British, Austrian and European standards; it combines car charger, direct charging and USB charging into one to meet charging under different conditions; dual USB The output interface can charge multiple electronic products. And this product is also the world's first charger to charge iPad. It takes about 4 hours to charge the iPad. You can take the iPad for a drive.

1. Put the mobile phone with wireless charging function on the wireless charging board and place it in a good position so that it can be charged. Note that some wireless charging panels support different mobile phone models. You should choose the wireless charging panel according to your mobile phone model. 2. It does not currently support long-distance charging. This technology may be achieved in the future. What is wireless charging technology? According to a report in the United States, a research institution has developed a wireless charger that can be used for long-distance. This charger includes A transmitter with a plug, an electronic receiver, as long as the power supply within a certain range can be transmitted to the terminal equipment equipped with the receiver. 3. The wireless charger uses radio waves to transmit. Radio waves are not only an electromagnetic wave, they can also transmit energy and penetrate the air, thus making wireless power transmission possible. Extended information: A wireless charger refers to a charger that does not use the traditional charging power cord to connect to the terminal device that needs to be charged. It uses the latest wireless charging technology. By using the alternating magneti

The Company Introduction: Shenzhen Waweis Technology Co., Ltd. is an emerging enterprise specializing in the development, production and sales of various power supplies and accessories. The main products are power adapters, switching power supplies, waterproof power supplies, constant current power supplies, lithium battery chargers, And other products. The factory is located in Henggang Street, Longgang District, Shenzhen, with a plant area of about 5,800 square meters. The company has R&D, production, quality, warehouse, business, and financial departments with more than 120 employees and complete production management. The system is recognized by the industry with integrity, strength and product quality. The company has a wide range of LED lamps, battery car chargers, led displays, power communications, monitoring equipment, industrial automation and other industries. "Respect for partners, carry forward the spirit of teamwork, be brave to innovate and develop, and be people-oriented" is the business philosophy of all employees, following in the footsteps of customers, continuously carrying out product innovation and service improvement. Develop together! Th

Nowadays, more and more places begin to use sterilization lamp, but many people don't know how it works. Basically be the lamp that passes special character to be able to emit a strong ULTRAVIOLET ray when bright, below such circumstance, how can just assure the action of ultraviolet ray sterilization lamp? This is very key, if you can grasp the knowledge of this aspect, then it can play a more powerful effect. The first, want to avoid surface layer to have the appearance of dirt or dirt as far as possible when installing ultraviolet disinfection lamp tube, this is very important. Because the dirty things of surface layer and dust cover may cause ultraviolet ray to have no way to illuminate come out, or it is to weaken to a certain extent, therefore must use industrial alcohol to carry on cleaning, and it is to do regularly to clean, can have the effect of ultraviolet ray tube irradiation and the extension of service life. Second, in peacetime to pay more attention to the maintenance of ultraviolet sterilization lamp, prevent the quartz part can be irradiated out of the effect, sufficient to ensure that there is no effect in the process of using the phenomenon. When you need to know whether there is a long-term use of ultraviolet sterilization lamp sterilization effect can go to buy can detect ultraviolet radiation intensity of some instruments, such as: ultraviolet radiation meter or ultraviolet intensity indicator card! Shenzhen Waweis Technology Co., Ltd. is a high-tech enterprise engaged in r&d, production and sales of uvc lamp. Main:UVC Sterilizer Lamp.Disinfection Uv Lamp.Uv Sterili

Notes on switching power supply 1. Matters needing attention when selecting switching power supply 1) Select the appropriate input voltage specification. 2) Choose the right power. In order to increase the life of the power supply, 30% more rated output power can be selected. 3) Consider load characteristics. If the load is a motor, bulb or capacitive load, when the current is large at the moment of starting up, appropriate power supply should be selected to avoid overload. If the load is the motor, consider the voltage reversal during shutdown. 4) In addition, it is also necessary to consider the working environment temperature of the power supply and whether there are additional auxiliary heat dissipation equipment, and the power supply needs to be de rated when the ambient temperature is too high. The derating curve of ring temperature to output power. 5) Select various functions according to the application requirements: Protection function: over voltage protection (OVP), over temperature protection (OTP), over load protection (OLP), etc. Application functions: signal function (normal power supply, pow

The update speed of electronic products is very fast. Sometimes after several updates, the original power adapter cannot be found. What can I do to power the electronic products? Many people want to buy power adapter, but there are so many power adapter products in the market, how to choose? For many people, the concept of power adapter only stays in the stage of charger, but in fact, power adapter is a kind of transformer, which is widely used in charger. For those who are not familiar with the power adapter, what kind of power adapter is used to charge. The most important issue in choosing a power adapter is the matching problem. Most of the electronic products on the market, such as tablet computers, laptops, smart phones, etc., are universal. But there are also exceptions. To ensure compatibility, you can look at the parameters of the interface, output current and output voltage of the non original adapter when purchasing the equipment to see whether the parameters meet the requirements. If all meet the requirements, then the compatibility is good, and you can rest assured to buy. In a word, the power adapter must be selected according to the actual demand. If the wrong product is selected, it will affect the performance and even bring security risks. The parameters of the power adapter are various, so the adapter can not be used for charging at will. Before selecting a power adapter, you must first determine three adaptation conditions.

At present, there are a lot of ultraviolet sterilization lamp in the market, we may not be particularly aware of ultraviolet sterilization lamp, now we do not introduce, it is actually a kind of low-pressure mercury lamp. Low-pressure mercury lamps emit UV light by being activated at lower mercury vapor pressures (<10-2Pa). There are two main spectral lines: one is the wavelength of 253.7nm; The other is the 185nm wavelength, both of which are uv rays invisible to the naked eye.

Fixed point timing sterilization, ventilation half an hour after completion Compared with alcohol, disinfectant and other sterilization products, the biggest feature of ultraviolet germicidal lamp is "fast". Therefore, it is not necessary to turn on the sterilization lamp for a long time when it is in use. Instead, reasonable sterilization time should be arranged according to the space use area. The ultraviolet germicidal lamp has three timing functions, corresponding to different space use areas: One gear for 15 minutes, suitable for about 10 square meters of space Second gear 30 minutes, suitable for 20 square meters Three gear 60 minutes, suitable for 40 square meters When the fixed time sterilization is completed, the lamp will automatically turn off. As the ultraviolet ray decomposes the oxygen in the air, it will produce

There are usually two types of shells for switching power supplies, one is a plastic shell and the other is an aluminum shell. What is the difference between the aluminum case and the plastic case of the switching power supply? This is a comparative analysis of whether the switching power supply is made of aluminum or plastic. 1. Advantages and disadvantages of switching power supply aluminum shell: The advantages of using aluminum shell for switching power supply are mainly that the metal shell has good heat dissipation conditions, strong structure, wear resistance, heat resistance, corrosion resistance, strong metal texture, and high aesthetics in people's hearts. The main disadvantages of using aluminum shells for switching power supplies are that the metal shell has high manufacturing costs, complicated forming, and leakage has occurred. It cannot be touched by hands during work and maintenance is not convenient. 2. The advantages and disadvantages of the plastic shell of the switching power supply: The main advantages of using plastic shells for switching power supplies are that the plastic shell has low manufacturing cost and quick shaping, which is conducive to adopting various shapes and structures to adapt to the use environment. It can be touched by hand while working, and maintenance is convenient.