Seven LED driver power supply experiences: 1. Give up m […]
Seven LED driver power supply experiences:
1. Give up more than 4 outputs, develop single or dual outputs, give up large currents and overcurrents, and develop small currents.
The more and more complex the number of output channels, the higher the cost of current interference between different outlets, and the higher the failure rate if they are not resolved. In addition, the greater the number of output channels, the greater the total output current. The current is the main cause of heat generation. The voltage itself does not directly lead to heat generation. In simple terms, the heat output is proportional to the square of the current, that is, the current increases to the original value. At 2 times, the calorific value will increase to 4 times the original, the current will increase 3 times, and the calorific value will increase to 9 times. In summary, the failure rate of a single- or dual-output LED lamp power supply will be much lower.
2. Intelligent control is one of the advantages of LED lamps, and power supply is the key to intelligent control.
Smart control has the most mature conditions in LED street lighting and LED tunnel lighting applications. Intelligent control can achieve stepless control of lamp power according to road traffic density at different time periods, which not only meets application requirements, but also achieves huge energy savings. The effect can save a large amount of funds for highway authorities. The application of tunnel lighting not only can save energy, but also can automatically adjust the brightness of the tunnel entrance in accordance with the brightness outside the tunnel, providing the driver with a visually excessive stage to ensure driving safety.
3, give up high power, high power, choose a high stability of the small and medium power supply.
Because the greater the power, the greater the amount of heat, and the more compact components inside, is not conducive to heat dissipation, and the temperature is the culprit of the power supply failure. Moreover, the development of relatively low-power power supplies is comparatively mature, with advantages in both stability and cost. In fact, many high-power power solutions have not been time-tested and proved by practice. All of them are rush-start projects and are experimental products. As a result, there are many kinds of faults. In contrast, due to the earlier development of small and medium-sized power supplies, the technical solutions must be mature.
4. Heat dissipation and protection are the main external factors of power failure.
Not only does the power supply itself generate heat, but also the lamps can heat up. How these two heat sources are emitted properly is a problem that lighting design engineers must consider. It is necessary to prevent over-concentration of heat, create a heat island effect, and affect the life of the power supply. Using a split power scheme is a good choice.
5, the feasibility of maintenance.
The problem of power supply failure can not be completely avoided, only when the replacement of the power supply to do with the replacement of conventional lighting light source is so simple, it can be used by the user happy, even if the power is broken, the mood will not be bad, and the user's Good or bad mood determines the fate of LED lamp manufacturers.
6, protective performance.
The protection problem is also very important. The penetration of moisture may cause a short circuit in the power supply. The dust on the enclosure will affect the heat dissipation of the power supply. Exposures will easily lead to high temperatures and aging of wires and other components. From the experience in practical use, the rotation The wiring plug has a higher failure rate, and most of the leaks cause malfunctions.
7, modular design.
Modular design has become the current trend. It is necessary to think of ways to integrate the module power supply. If the power supply can be used to solve the maintenance problem, it will be welcomed by users. At the same time, it needs to establish interface standardization, so that different manufacturers LED lamp power supply can be used universally.
Summary: LED lamp power is best to use split design, while focusing on the reliability and life of the power supply, even if increase the cost, only in the perspective of customers to design products, companies can get long-term development.