Seven Experiences of LED Lamp Driver Power Supply

Seven Experiences of LED Lamp Driver Power Supply

In recent years, with the continuous development of LED lamp packaging technology and heat dissipation technology, the stability of LED lamps has reached a relatively good level. The main cause of light attenuation and color drift is the products of some counterfeit manufacturers, mainly due to unreasonable heat dissipation design. Relatively speaking, the problem with LED light driver power supply is much more serious, which is the main cause of dead or flickering lights. In other words, LED light driver power supply has become a weakness in LED light quality. According to the barrel theory, the lifespan of LED light driver power supply is the lifespan of LED lights.

Conventional lighting street lamps are separated from the power supply by the lamp head, and the lamp head that usually fails is the high-pressure sodium lamp. The national standard for high-pressure sodium lamps stipulates a one-year warranty period, and the street lamp management unit will store a certain number of sodium lamps. High pressure sodium lamps have mature national standards, and their main parameters such as component size and power are unified and interchangeable.

The current malfunction of LED lights mainly lies in the power supply, so the main issue is to solve the power supply problem. Due to the lack of mandatory unified standards for LED power supplies at present, the power supplies on the market are independent, with single channel, multiple channels, and different sizes, making it difficult to replace. With the emergence of high-power LED street lights and LED tunnel lights on the market, LED driver power failures are frequent. In addition, LED street light driver power supplies often use built-in designs, which often make it difficult to maintain LED light power supplies. In addition, some manufacturers lack after-sales repair services. As a result, complaints from owners are rampant. After media exaggeration and promotion, it has caused misunderstandings about LED lights among the public, affecting the reputation of the LED industry.

1. Abandon more than 4 outputs, develop single or two outputs, abandon high and high currents, and develop low currents.

The more output channels there are, the more complex it becomes. The cost of solving current interference between different outlets is high. If not solved, the failure rate is higher. In addition, the more output paths there are, the greater the total output current, and current is the main cause of heating. The voltage itself does not directly cause heating. Simply put, the heat generated is proportional to the square of the current. In other words, if the current increases by 2 times, the heat generated will increase by 4 times, and if the current increases by 3 times, the heat generated will increase by 9 times. In summary, the failure rate of LED light power supply with single or dual output will be significantly reduced.

2. Intelligent control is one of the advantages of LED lighting fixtures, and power supply is the key to intelligent control.

Intelligent control has the most mature conditions and obvious effects in the application of LED street lights and LED tunnel lights. Intelligent control can achieve stepless control of lamp power at different time periods based on road traffic density, meeting application requirements and achieving huge energy-saving effects, which can save a lot of funds for road management units. The application of tunnel lighting not only saves energy, but also automatically adjusts the brightness of tunnel entrances and exits according to the brightness outside the tunnel, providing drivers with a visual transition stage to ensure driving safety.

3. Abandon high-power and ultra high power, and choose medium and small power sources with higher stability.

Because the higher the power, the greater the heat generated, and the more compact the components inside, it is not conducive to heat dissipation, and temperature is the culprit for power failure. Furthermore, low-power power sources have relatively mature development, with advantages in stability and cost. In fact, many high-power power supply solutions have not been validated and proven over time. They are hastily launched projects and experimental products, resulting in frequent malfunctions. In contrast, small and medium-sized power sources have developed earlier and their technical solutions are much more mature.

4. Heat dissipation and protection are the main external factors for power supply failures.

Not only does the power supply itself heat up, but the lighting fixtures also heat up. How to reasonably dissipate these two types of heat sources is a problem that lighting fixture design engineers must consider. It is necessary to prevent excessive concentration of heat, forming a heat island effect, and affecting the lifespan of the power supply. Adopting a separate power supply scheme is a good choice.

5. Feasibility of maintenance.

The problem of power failure cannot be completely avoided, and Chengdu Chaoyue Optoelectronics has proposed the principle of easy maintenance. Only when the replacement of the power supply is as simple as the replacement of conventional lighting sources, can users be happy to use it. Even if the power supply is broken, their mood will not be too bad, and the quality of their mood determines the fate of LED light manufacturers.

6. Protective performance.

Protection issues are also important. The penetration of moisture may cause a short circuit in the power supply, the sand and dust on the shell can affect the heat dissipation of the power supply, and exposure to sunlight can easily cause high temperatures and aging of wires and other components. Based on practical experience, the failure rate of rotating wiring plugs is relatively high, mostly caused by water leakage.

7. Modular design.

Modular design has become a trend today, and it is necessary to find ways to integrate module power supply. If the power supply can solve maintenance problems by plugging and unplugging, it will definitely be welcomed by users. At the same time, it is necessary to establish interface standardization to enable LED light power supplies from different manufacturers to be functional.

Summary: It is best to adopt a split design for LED light power supply, while paying attention to the reliability and lifespan of the power supply, even if it increases costs slightly. Only by designing products from the perspective of customers can enterprises achieve long-term development.