1. High reliability: It is especially like the driving power supply of LED street lights, installed at high altitude, it is inconvenient to maintain, and the maintenance cost is also high.
2. High efficiency: The luminous efficiency of LED decreases with the increase of LED temperature, so the heat dissipation of LED is very important. The efficiency of the power supply is high, its power consumption is small, and the heat generated in the lamp is small, which reduces the temperature rise of the lamp. It is beneficial to delay the light decay of LED.
3. Drive mode: There are two kinds of driving methods: one is a constant voltage source for multiple constant current sources, and each constant current source supplies power to each LED individually. In this way, the combination is flexible, and the failure of one LED will not affect the work of other LEDs, but the cost will be slightly higher. The other is direct constant current power supply, with LEDs running in series or parallel. Its advantage is that the cost is a little lower, but the flexibility is poor, and it must solve the problem of a certain LED failure without affecting the operation of other LEDs. These two forms coexist for a period of time. Multi-channel constant current output power supply mode will be better in terms of cost and performance. Maybe it is the mainstream direction in the future.
4. Surge protection: The ability of LEDs to resist surges is relatively poor, especially the ability to resist reverse voltage. Therefore, the LED drive power supply must have the ability to suppress the intrusion of surges and protect the LED from damage.
