Expert experiment summary of the essence of the LED driver power supply design seven tips
For the manufacturer, the design of the LED driver power supply is very important. So, how should we better design the LED driver power supply? After a lot of experiments, the experts came up with the following seven skills.
1. Intelligent control is one of the advantages of LED lamps, and power supply is the key to intelligent control.
Intelligent control is the most mature condition in LED street light and LED tunnel light lighting application. Intelligent control can realize stepless control of lamp power according to road traffic density in different time periods, which not only meets application requirements, but also realizes huge energy saving. The effect can save a lot of money for the highway supervisory unit. The application in tunnel lighting not only saves energy, but also automatically adjusts the brightness of the tunnel entrance and exit according to the brightness outside the tunnel, providing the driver with a visual over-stage to ensure driving safety.
2, give up high power, super high power, choose a medium and small power supply with higher stability.
Because the greater the power, the greater the heat, the more compact the components inside, which is not conducive to heat dissipation, and the temperature is the culprit of power failure. Moreover, the low-power power supply is relatively mature in development, and has advantages in terms of stability and cost. In fact, many high-power power solutions have not been time-tested and proven in practice. They are all rushed projects, all of which are experimental products, so the faults are endless. In contrast, small and medium-sized power supplies have matured due to their earlier development.
3. Heat dissipation and protection are the main external factors of power failure.
Not only the power supply itself will heat up, but also the lamps will heat up. How to properly dissipate these two heat sources is a problem that the lighting design engineer must consider. It is necessary to prevent excessive heat concentration, form a heat island effect, and affect the life of the power supply. A split power solution is a good choice.
4. Feasibility of maintenance.
The problem of power failure cannot be completely avoided. Chengdu Chaoyue Optoelectronics proposed the principle of maintenance simplicity. Only when the replacement of the power supply is made as simple as the replacement of the light source of the conventional illumination 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 lamp manufacturer. fate.
5. Protective performance.
The protection problem is also very important. The penetration of moisture may cause short circuit of the power supply. The dust on the outer casing will affect the heat dissipation of the power supply. Exposure will easily cause high temperature and aging of wires and other components. From the experience in actual use, the rotation The failure rate of the wiring plug is high, and most of them are faults caused by water leakage.
6, modular design.
Modular design has become the trend of today. It is necessary to find a way to integrate the module power supply. If the power supply can solve the maintenance problem by plugging and unplugging, it will be welcomed by users. At the same time, it is necessary to establish interface standardization for different manufacturers. LED light power can be used universally.
7. Give up 4 or more outputs, develop single or two outputs, abandon large currents and large currents, and develop small currents.
The more the number of output channels is more complicated, the current interference between different outlets is solved, and the cost is high. If not solved, the failure rate is high. In addition, the more the number of output channels, the larger the total output current, and the current is the main cause of heat generation. The voltage itself does not directly cause heat. Simply speaking, the heat is proportional to the square of the current, that is, the current increases to the original. 2 times, the heat will increase to 4 times, the current will increase to 3 times, and the heat will increase to 9 times. In summary, the single- or two-output LED lamp power failure rate will be much lower.
Through the above seven points, manufacturers will be more convenient when designing led drive power. Work will save you more time.
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