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   依據電網的用電的特色，led特性的請求以及有關LED商品，在挑選LED驅動電源時要思考到以下幾點：
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:
全體準則
All criteria
a、依據LED電流和電壓特色，對比抱負的是運用恒流驅動。它能避免LED正向電壓的改動而導致電流變化，一起安穩的電流使LED的亮度安穩。
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、別的，LED光通量與溫度成反比，所以運用中應盡量減少電源發熱和規劃杰出的散熱體系。然后下降LED的作業的溫度。
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、為了保證LED的全體壽數有必要將LED的節溫控制在必定的范圍內。
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芯片和電源，散熱外殼，控制電路等構成。其間LED電源的好壞直接影響了商品的好壞。特別是LED路燈商品，因為裝在高空，修理不方便，修理的花費也大。
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是節能商品，驅動電源也要契合節能的請求。特別是電源裝置在燈具內的構造，尤為重要。因為LED的發光效率隨著LED溫度的添加而下降。電源的效率高，它的耗費功率小，在燈具內發熱量就小，也就下降了燈具的溫升。可延緩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 恒流驅動方法
3 constant current driving method
為了配合LED的VI特性，所以LED電源有必要運用恒流驅動的方法。
In order to match the VI characteristics of LED, it is necessary to use constant current drive method for LED power supply.
4 浪涌維護
4 surge maintenance
LED抗沖擊才能對比差，所以要加強這方面的維護。特別是一些裝在野外的商品，因為電網負載的發動和雷。因而LED驅動電源要有抑制浪涌的侵入，維護LED不被損壞的才能。
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 溫度維護功用
5 temperature maintenance function
電源除了慣例的維護功用外，最好在恒流輸出中添加LED芯片溫度負反饋，避免LED芯片PN節溫度過高。
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電源壽數
6 days LED power
驅動電源的壽數盡最大努力與LED芯片的壽數般配和。
The driving power of life best life and matched with the LED chip.
7 作業環境
7 working environment
因為各個地方的環境的不一樣要著重思考LED燈具所作業場合的環境如：溫度、濕度、裝置方位等。
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..
思考到電源的作業方法，假如不加軟發動電路，通電剎那間，輸出會有一個電壓尖峰。為更好的維護LED，所以需要加軟發動電路。這一點恰是驅動電源安穩性的一個關鍵因素。
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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