For the manufacturer, the design of the LED drive power is very important. So, how should we better design the LED drive power? After a large number of experiments, experts concluded the following seven tips.
1. Intelligent control is one of the advantages of LED lamps, and power supply is the key to intelligent control.
Intelligent control has the most mature conditions and the most obvious effects in LED street lamp and LED tunnel lamp lighting applications. Intelligent control can achieve stepless control of lamp power at different time periods and according to road traffic density, which not only meets application requirements but also achieves huge energy saving. As a result, it can save a lot of money for the competent highway unit. The application of tunnel lighting can not only save energy, but also automatically adjust the brightness of the entrance and exit of the tunnel according to the brightness outside the tunnel to provide the driver with a visual transition stage to ensure driving safety.
2. Abandon high-power and super-high-power, and choose medium and small power supplies with higher stability.
Because the greater the power, the greater the heat, and the more compact the components inside, which is not conducive to heat dissipation, and the temperature is the culprit of the power supply failure. In addition, the development of low-power power supply is relatively mature, with advantages in stability and cost. In fact, many high-power power supply solutions have not been time-tested and proven in practice. They are projects that have been launched in a hurry, and they are all experimental products, so failures are endless. In contrast, due to the early development of small and medium-sized power supplies, the technical solutions are much more mature.
3. Heat dissipation and protection are the main external factors of power failure.
Not only does the power supply itself generate heat, but the lamp also generates heat. How to reasonably radiate these two heat sources is a problem that the lamp design engineer must consider. It is necessary to prevent excessive concentration of heat to form a heat island effect and affect the life of the power supply. It is a good choice to use a separate power supply solution.
4. Feasibility of maintenance.
The failure of the power supply cannot be completely avoided, and Chengdu Chaoyue Optoelectronics has proposed the principle of ease of maintenance. Only when the replacement of the power supply is as simple as the replacement of the light source of the conventional lighting, can the user be happy. Even if the power supply is broken, the mood will not be too bad, and the user's mood determines the LED light manufacturer's fate.
5. Protection performance.
Protection problems are also very important. The penetration of moisture may cause a short circuit of the power supply. Sand and dust on the shell will affect the heat dissipation of the power supply. Exposure may easily cause high temperature and the aging of wires and other components. From practical experience, the rotation The failure rate of the wiring plug is high, and most of them are caused by water leakage.
6. Modular design.
Modular design has become the trend of the day, and we must find a way to integrate the power supply of the module. If the power supply can solve the maintenance problem by plugging and unplugging, it will definitely be welcomed by users. At the same time, it is necessary to establish a standardized interface to allow different manufacturers LED lamp power supply can be universal.
7. Abandon more than 4 outputs, develop single or two outputs, abandon high current and super large current, and develop small current.
The more the number of output channels is, the more complicated it is. The current interference between different outlets is very costly to solve. If it is not solved, the failure rate is higher. In addition, the greater the number of output channels, the greater the total output current, and the current is the main cause of heat generation. The voltage itself does not directly cause heat generation. In short, the heat generation is proportional to the square of the current, that is, the current increases to the original If it is doubled, the calorific value will be increased by 4 times, the current will be increased by 3 times, and the calorific value will be increased by 9 times. To sum up, the failure rate of single or two-output LED lamp power supply will be reduced a lot.
Through the above seven points, manufacturers will be more convenient when designing LED drive power. Work will save time.
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