依据电网的用电的特色，led特性的请求以及有关LED商品，在挑选LED驱动电源时要思考到以下几点：
According to the characteristics of the power grid, led characteristics and the requirements of the LED products, in the selection of LED driver power to consider the following points:
全体准则
All criteria
a、依据LED电流和电压特色，对比抱负的是运用恒流驱动。它能避免LED正向电压的改动而导致电流变化，一起安稳的电流使LED的亮度安稳。
A, according to the characteristics of LED current and voltage, the ideal is the use of constant current drive. It can avoid the change of the LED forward voltage and cause the change of current, and the stable current makes the brightness of LED stable.
b、别的，LED光通量与温度成反比，所以运用中应尽量减少电源发热和规划杰出的散热体系。然后下降LED的作业的温度。
B and other LED flux is inversely proportional to temperature, so the use should try to reduce the cooling system power supply heating and planning outstanding. Then drop the temperature of the LED job.
c、为了保证LED的全体寿数有必要将LED的节温控制在必定的范围内。
C, in order to ensure all the life LED it is necessary to temperature LED control in a certain range.
1 高可靠性
1 high reliability
LED商品主要是有LED芯片和电源，散热外壳，控制电路等构成。其间LED电源的好坏直接影响了商品的好坏。特别是LED路灯商品，因为装在高空，修理不方便，修理的花费也大。
LED products are mainly LED chips and power supply, cooling shell, control circuit, etc.. In the meantime, the quality of LED directly affects the quality of the goods. In particular, LED street lamp products, because installed in the air, repair is not convenient, the cost of repair is also large.
2 高效率
2 high efficiency
LED是节能商品，驱动电源也要契合节能的请求。特别是电源装置在灯具内的构造，尤为重要。因为LED的发光效率随着LED温度的添加而下降。电源的效率高，它的耗费功率小，在灯具内发热量就小，也就下降了灯具的温升。可延缓LED的光衰有利。
LED is an energy-saving commodity, the power supply must comply with the requirements of energy-saving. In particular, the structure of the power supply device is particularly important. Because the luminous efficiency of LED decreased with the increase of LED temperature. The efficiency of the power supply is high, the power consumption is small, the heat is small in the lamp, and the temperature rise of the lamp is decreased. LED can delay the attenuation of favorable.
3 恒流驱动方法
3 constant current driving method
为了配合LED的VI特性，所以LED电源有必要运用恒流驱动的方法。
In order to match the VI characteristics of LED, it is necessary to use constant current drive method for LED power supply.
4 浪涌维护
4 surge maintenance
LED抗冲击才能对比差，所以要加强这方面的维护。特别是一些装在野外的商品，因为电网负载的发动和雷。因而LED驱动电源要有抑制浪涌的侵入，维护LED不被损坏的才能。
LED shock resistance to poor contrast, so to strengthen the maintenance of this area. In particular, some of the goods installed in the field, because the grid load and thunder. Therefore, the LED driver power supply should be used to prevent the intrusion of the surge and maintain the ability of the LED to be damaged.
5 温度维护功用
5 temperature maintenance function
电源除了惯例的维护功用外，最好在恒流输出中添加LED芯片温度负反馈，避免LED芯片PN节温度过高。
In addition to the usual maintenance function, it is best to add LED chip temperature negative feedback in the constant current output, to avoid the high temperature of the LED chip PN section.
6 LED电源寿数
6 days LED power
驱动电源的寿数尽最大努力与LED芯片的寿数般配和。
The driving power of life best life and matched with the LED chip.
7 作业环境
7 working environment
因为各个地方的环境的不一样要着重思考LED灯具所作业场合的环境如：温度、湿度、装置方位等。
Because of the different places of the environment should be focused on the work environment of the LED lamps, such as: temperature, humidity, device orientation, etc..
思考到电源的作业方法，假如不加软发动电路，通电刹那间，输出会有一个电压尖峰。为更好的维护LED，所以需要加软发动电路。这一点恰是驱动电源安稳性的一个关键因素。
Think about the power supply operation method, if you do not add soft start circuit, the power of the moment, the output will have a voltage spike. In order to better maintain the LED, so you need to add soft start circuit. This is a key factor in driving power supply stability.

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