(1) high reliability Especially as the driving power of […]
(1) high reliability
Especially as the driving power of LED street lamps, installed in the upper air, maintenance is inconvenient, and the cost of maintenance is also large.
(2) high efficiency
LED is an energy-saving product, and the efficiency of driving power supply is high. It is very important for the heat supply of the power supply to be installed in the lamp. The efficiency of the power supply is high, the power consumption of it is small, the heat inside the lamp is small, and the temperature rise of the lamp is also reduced. Favorable to delay the LED attenuation.
(3) high power factor
Power factor is the requirement of power grid to load. General 70 watts below the household appliances, there is no mandatory indicators. Although the power is small, the power factor of a single appliance is lower than that of the power grid, but the use of lighting at night is too large and the same kind of load is too concentrated, which will cause serious pollution to the power grid. For the 30 watt ~40 watt LED drive power, it is said that in the near future, there may be some requirements on the power factor.
(4) drive mode;
Now there are two kinds of traffic: one is a constant voltage source for multiple constant current sources, and each constant current source is supplied to each LED separately. This way, flexible combination, all the way LED failure, does not affect other LED work, but the cost will be slightly higher. The other is the driving mode of direct constant current power supply, and the LED runs in series or in parallel. It has the advantage of lower cost, but less flexibility, but also to solve a LED fault, does not affect other LED running problems. These two forms coexist over a period of time. Multi channel constant current output mode will be better in cost and performance. Maybe it's the main direction in the future.
(5) surge protection
LED's ability to withstand surges is relatively poor, especially against reverse voltage. It is also important to strengthen protection in this regard. Some LED lights are mounted outdoors, such as LED street lights. Due to the power grid load and lightning induction, from the power grid system will invade a variety of surge, and some surge will cause damage to the LED. As for the frequent replacement of power and lamps, the LED drive power shall have the ability to prevent surge intrusion and protect the LED from damage.
(6) protection function;
In addition to the conventional protective function of the power supply, it is better to increase the LED temperature negative feedback in the constant current output to prevent the excessive temperature of the LED, and to meet the requirements of safety regulations and electromagnetic compatibility.http://www.gentwin.com/