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HAOWANGDA
HAOWANGDA

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POWER ADAPTER&LED SWITCHING POWER SUPPLY GLOBAL PROVIDER

Haowangda
Haowangda

Led Power Supply

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Power Adapter

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Haowangda

POWER ADAPTER&LED SWITCHING POWER SUPPLY GLOBAL PROVIDER

Shantou Haowangda Electric Appliance Co., Ltd. is a professional manufacturer engaged in the research, development, production, sale and service of Power adapter,Constant current power supply,Regulated power supply,charger,Dc power adapter. It is suitable for set-top boxes and networks. LEDs, routers and other electronic products.

2020 Y

Company started

3000 ㎡

Company covers an area

50 +

Company's existing employees

100 +

Sales Region

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POWER ADAPTER&LED SWITCHING POWER SUPPLY GLOBAL PROVIDER

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12V 5A desktop adapter

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WHY CHOOSE US

Our products are of high quality Selling well in all cities and provinces around China, our products are also exported to more than 40 countries,such as United States, United Kingdom, Germany, Spain, France, Turkey. Canada, Europe, Poland, Serbia,Mexico, Brazil, India, Thailand, Middle East and South Africa,Indonesia, South Korea, Malaysia, Thailand, Vietnam, Hong Kong. Taiwan.etc.. We also welcome OEM and ODM orders.

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Active safety

We have advanced production lines, a sound management system, and our manufacturing is based on the goal of good safety, adding points to every product.

Haowangda

Innovation drive

We incorporate advanced technology and equipment into our production, as well as a complete design and development team, to continuously practice and innovate to create more suitable products for you.

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Energy conservation

Our goal is not just market sales or corporate reputation, but also for the future of the earth

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Passive safety

We not only produce products, but also provide you with peace of mind. With high-quality products and thoughtful services, we gain your cooperation and support.

NEWS CENTER

POWER ADAPTER&LED SWITCHING POWER SUPPLY GLOBAL PROVIDER

The power adapter of the mobile phone needs to be recognized for the voltage volt

The power adapter of the mobile phone needs to be recognized for the voltage volt

1. Types and specifications of mobile phone chargers Mobile phone chargers can be divided into two categories based on their output current and voltage: direct charging and seat charging. Direct charging, also known as fast charging, can be directly plugged into a power outlet to charge a mobile phone; On the other hand, a charging dock requires placing the phone on the charging dock for charging. In addition, according to the different output currents, mobile phone chargers are divided into different specifications such as 1A and 2A. The requirements for chargers vary among different brands and models of mobile phones. 2. Compatibility of different brands of mobile phone chargers Many users often mix different brands or models of phone chargers for convenience. However, due to differences in chip and circuit design used by different brands of mobile phone chargers, their output current, voltage and other parameters are also different. Therefore, mixing them may cause damage to the chargers and even lead to safety accidents. Therefore, it is not recommended to mix different brands of mobile phone chargers.

The driving method of LED lighting power supply

The driving method of LED lighting power supply

LEDs cannot directly use conventional mains voltage. Due to the characteristics of LED light sources, in order to meet the special voltage and current requirements of LED, it is necessary to use specially designed voltage conversion equipment to ensure the normal operation of LED. So LED lighting fixtures have a different power drive method from traditional lighting fixtures. The driving methods of LED lighting power supply include two types: Firstly, a constant current driving power supply. 1. The output current of a constant current drive circuit is constant, while the output DC voltage varies within a certain range with the size of the load resistance. When the load resistance is small, the output voltage is low, and the larger the load resistance, the higher the output voltage; 2. A constant current circuit is not afraid of load short circuits, but it is strictly prohibited to completely open the load; 3. The constant current drive circuit is ideal for driving LEDs, but relatively expensive; 4. Attention should be paid to the maximum withstand current and voltage values used, which limit the number of LEDs used. Secondly, a regulated driving power supply. 1. After the various parameters in the voltage stabilizing circuit are determined, the output voltage is fixed, while the output current changes with the increase or decrease of the load; 2. The voltage stabilizing circuit is not afraid of open circuit of the load, but it is strictly prohibited to have a complete short circuit of the load; 3. Drive the LED with a voltage stabilizing driving circuit, and add appropriate resistors to each string in order to make the brightness of each LED display average;

2024-03-28

Characteristics of LED driver power supply

According to the electricity consumption rules of the power grid and the characteristic requirements of LED drive power supplies, the following points should be considered when selecting and designing LED drive power supplies: 1. High reliability, especially like the driving power supply for LED street lights, installed at high altitude, with a waterproof aluminum shell driving power supply. If the quality is good, it is not easy to break and reduces the number of repairs. 2. High efficiency LEDs are energy-saving products, and the efficiency of the driving power supply should be high. For the structure where the power supply is installed inside the lamp, it is particularly important. Because the luminous efficiency of LED decreases with the increase of LED temperature, the heat dissipation of LED is very important. The power supply has high efficiency, low power consumption, and generates less heat inside the lamp, which reduces the temperature rise of the lamp. It is beneficial for delaying the light decay of LEDs. 3. High power factor is a requirement of the power grid for loads. Generally, there are no mandatory indicators for electrical appliances below 70 watts. Although the power factor of individual appliances with low power has little impact on the power grid, lighting up at night and concentrating similar loads can cause serious pollution to the power grid. For LED driver power supplies ranging from 30 watts to 40 watts, it is said that there may be certain requirements for power factor in the near future. There are two driving modes available: one is a constant voltage source that supplies multiple constant current sources, with each constant current source supplying separate power to each LED. This method is flexible in combination, and if one LED fails, it will not affect the operation of other LEDs, but the cost will be slightly higher. Another method is direct constant current power supply, with LED series or parallel operation. Its advantage is that it has a lower cost, but poor flexibility, and it also needs to solve the problem of one LED malfunction, which will affect the operation of other LEDs. These two forms coexist for a period of time. The multi-channel constant current output power supply method will have better cost and performance. Perhaps it is the mainstream direction in the future. 5. The ability of LED surge protection to withstand surges is relatively poor, especially in terms of resistance to reverse voltage. Strengthening protection in this area is also important. Some LED lights are installed outdoors, such as LED street lights. Due to the load shedding of the power grid and the induction of lightning strikes, various surges may invade the power grid system, some of which can cause damage to the LED. Therefore, the LED driver power supply should have the ability to suppress surge intrusion and protect the LED from damage. 6. Protection function: In addition to conventional protection functions, it is best to add LED temperature negative feedback in the constant current output of the power supply to prevent excessive LED temperature. 7. In terms of protection, the external installation type of the lamp should be waterproof and moisture-proof, and the outer shell should be sun resistant. 8. The lifespan of the driver power supply should match the lifespan of the LED. 9. It must comply with safety regulations and electromagnetic compatibility requirements. With the increasing application of LED, the performance of LED driver power supply will become more and more suitable for the needs of LED

2024-03-28

What is LED power supply

LED driver power supply is a power converter that converts the power supply into a specific voltage and current to drive LED lighting. Generally, the input of LED driver power supply includes high-voltage AC (i.e. mains), low-voltage DC, high-voltage DC, low-voltage high-frequency AC (such as the output of electronic transformers), etc. The output of LED driver power supply is mostly a constant current source that can change the voltage with the change of LED forward voltage drop value.

Get Started Today!

Our products are of high quality Selling well in all cities and provinces around China, our products are also exported to more than 40 countries,such as United States, United Kingdom, Germany, Spain, France, Turkey. Canada, Europe, Poland, Serbia,Mexico, Brazil, India, Thailand, Middle East and South Africa,Indonesia, South Korea, Malaysia, Thailand, Vietnam, Hong Kong. Taiwan.etc.. We also welcome OEM and ODM orders.

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