LED是英文“LIGHTEMITTINGDIODE”的缩写，中文简称发光二极管，因为它具有环保、寿数长、光电功率高(如今光效现已到达100LM/W)、抗震等很多长处，这些年在各行业使用得以敏捷开展，理论上，LED的使用寿数在10万小时摆布，但在实践使用过程中，有些LED灯具规划人员对LED驱动电源知道缺乏或选用不妥或一味寻求低本钱，成果使LED灯具商品寿数大大缩短，差的LED灯具寿数不到2000小时，有的乃至更低，成果使LED灯具的优势得不到极好的发挥。
LED is the abbreviation of "LIGHTEMITTINGDIODE", English Chinese referred to as light emitting diodes, because it has long life, environmental protection, photovoltaic power (high light efficiency now has now reached 100LM/W), earthquake and other many advantages, these years to the rapid development in the industry theory, the use of LED to go in 100 thousand hours or so, but in practice in the process of using some LED lighting planning personnel for LED driver knows the lack of or use improper or blindly seek low cost, results of the LED lamp life commodity is greatly shortened, LED lamp life difference less than 2000 hours, some even lower, results of the LED lamps advantages are not good play.
因为LED加工制作的特殊性，致使不一样的出产厂家乃至同一个出产厂家在同一批商品中所出产的LED的电流、电压特性均有较大的个体区别。现以大功率1W白光LED典型标准为例，依照LED的电流、电压改动规则来做扼要阐明，通常1W白光使用正向电压为3.0-3.6V摆布，也就是说，当标称为1W的LED在流过350毫安电流时，它两头的电压也许在3.1V，也也许在 3.2V或3.5V也也许是其它值，为确保1WLED的寿数，通常LED出产厂家主张灯具厂用350mA的电流去驱动，当经过LED两头的正向电流到达 350毫安后，LED两头的正向电压很小的增加，都会使LED正向电流大幅度的上升，使LED温度成直线上升，然后加快LED光衰，使LED的寿数缩短，严峻时乃至烧坏LED。因为LED的电压、电流改动的特殊性，因而对驱动LED的电源提出了严厉请求。
Because of the special nature of the LED processing, resulting in the same manufacturers and even the same manufacturer in the same batch of goods produced by the LED of the current, voltage characteristics have greater individual differences. The high-power white 1W LED standard as an example, according to the LED current and voltage change rule for this article, usually use white 1W forward voltage controlled for 3.0-3.6V, that is to say, when nominal 1W in LED through 350 ma current when it ends the voltage may be in the 3.1V, probably in 3.2V or 3.5V also may be other values, to ensure that the 1WLED days, usually LED manufacturers claim lamp factory with 350mA current to drive, when the forward current LED two to 350 Ma, LED forward voltage at both ends of the small increases, will make up the LED forward current greatly, so that the temperature of LED a linear increase, and then accelerate the LED decay, the LED life shortened, serious and even damage the LED. Because of the particularity of the voltage and current changes of the LED, the power supply of the drive LED is put forward a severe request.
LED驱动电源是LED灯具的关键所在，它就比方一个人的心脏，要制作高品质的、用于照明的LED灯具有必要抛弃恒压方法驱动LED。
LED driver power supply is the key to LED lamps, it is like a person's heart, to produce high quality, for the lighting of the LED lamp is necessary to abandon the constant pressure method to drive LED.
如今很多大功率LED封装厂将很多颗单个的LED经过并联和串联的方法将它们封在一同出产出了单个20W、30W或50W或100W乃至更高功率的LED，虽然在封装前这些单个的LED都严厉做了挑选和配对，但因为内部数量少则有几十颗、多则几百颗单体LED,因而封装后的大功率LED制品在电压和电流上依然有很大的区别，且比较单个的LED(通常单个白光、绿光、蓝光作业电压在2.7-4V，单个红光、黄光、橙光作业电压在1.7-2.5V)参数区别更大!
Now a lot of high power LED packaging factory will be a lot of single LED method after parallel and series they will be sealed together to produce a single 20W, 30W or 50W or 100W or even higher power LED, although the package before these individual LED are strictly made selection and matching, but because of the internal numbers there are dozens of stars, many hundreds of monomer LED, and high power LED products packaged in voltage and current still have great difference, and a single LED (usually single white, green and blue operating voltage in 2.7-4V, a single red light, yellow light, orange light operating voltage in the 1.7-2.5V parameter difference) more!

　当时很多厂家出产的LED灯类商品(比方护栏、灯杯、投射灯、庭院灯等)，选用阻、容降压，然后加上一个稳压二极管稳压，向LED供电，这么驱动 LED的方法存在极大缺陷，首先是功率低，在降压电阻上耗费很多电能，乃至有也许超越LED所耗费的电能，且无法供给大电流驱动，因为电流越大，耗费在降压电阻上的电能就越大，无法确保经过LED电流不超越其正常作业请求，规划商品时都会选用降低LED两头电压来供电驱动，这么是以献身LED亮度为价值的。选用阻、容降压方法驱动LED，LED的亮度不能安稳，当供电电源电压低时，LED的亮度变暗，供电电源电压高时，LED的亮度变亮些。当然，阻、容降压方法驱动LED的最大优势是本钱低,因而如今依然有有些LED灯具公司在选用这种方法。
At that time, many manufacturers produce goods (for example, LED lamp, guardrail, lamp cup, projection lamp, garden lamp, etc.), selection of resistance capacity decompression, and then add a zener diode voltage to the LED power supply, so there is a great defect of LED driving method, first is the low power consuming a lot of electricity in the step-down resistor and maybe, beyond the LED cost of electricity, and can supply large current drivers, because the current is larger, in reducing resistance of electricity is bigger, can not ensure that after LED current is not beyond its normal job request, planning goods can choose LED to reduce the voltage at both ends of power supply, so it is the dedication for the value of the LED brightness. Selection of resistance, capacitance step-down method to drive LED, LED brightness can not be stable, when the power supply voltage is low, the brightness of the LED becomes dark, when the supply voltage is high, the brightness of LED becomes brighter. Of course, the resistance, the capacity of the biggest advantage is to reduce the cost of driving LED is low, so there are still some LED Lighting Companies in the selection of this method.
有些厂家，为降低商品的本钱，选用恒压驱动LED，相同带来了批量出产时每个LED发光亮度不均匀、LED不能作业于最佳状态等一系列问
Some manufacturers, in order to reduce the cost of goods, the use of constant pressure drive LED, the same batch of production when each LED luminous brightness uneven, LED can not work in the best state and a series of questions
恒流源驱动是最佳的LED驱动方法，选用恒流源驱动，不用在输出电路串联限流电阻，LED上流过的电流也不受外界电源电压改动、环境温度改动，以及LED参数离散性的影响，然后能保持电流安稳，充沛发挥LED的各种优秀特性。
Constant current source driver is the best LED driving method, the constant current source drive, without limiting resistor in series output circuit, LED current is not affected by external power supply voltage changes, environmental temperature changes, and the impact of discrete LED parameters, then it can maintain the current stable, give full play to various excellent characteristics of LED.
选用LED恒流电源来给LED灯具供电，因为在电源作业时期都会自动检测和控制流过LED的电流，因而，不用忧虑在通电的刹那间有过高的电流流过LED，也不用忧虑负载短路烧坏电源。
The LED constant current power supply to the LED lamp power supply, because the current in the power supply operation period will automatically detect and control through the LED so don't worry too much LED current flows in the power suddenly, do not worry the power load short circuit burned out.
选用恒流驱动方法，它能防止LED正向电压的改动而引起电流改变，同时安稳的电流使LED的亮度安稳，也便于LED灯具厂施行大批量出产时确保商品的一致性，因而很多厂家现已充沛知道到驱动电源的重要性，很多LED灯具厂家现已抛弃恒压方法，而选用本钱稍高的恒流方法驱动LED灯具了。
The constant current driving method, it can prevent the change of the LED forward voltage caused by the current change at the same time, stable current brightness stable LED, to ensure consistency of goods for LED lamps factory mass production purposes, so many manufacturers now fully know the importance to driving power, a lot of LED lighting manufacturers has abandoned the constant pressure method and selection method of constant current drive LED lamps cost slightly higher.
有些厂家忧虑电源驱动板选用电解电容会影响电源的寿数，其实是一种误解，比方：假如选用105度，寿数为8000小时的高温电解电容，依据通行的电解电容寿数预算方法“每降低10度，寿数增加一倍”，那么它在95度环境下作业寿数为16000小时，在在85度环境下作业寿数为32000小时，在75度环境下作业寿数为64000小时，假如实践作业温度更低，那么寿数会更长!由此看来，只需选用高品质的电解电容对驱动电源的寿数是没有什么影响的!
Some manufacturers worry power driven plate with electrolytic capacitor will affect the power of life, is actually a misunderstanding, for example: if you use 105 degrees of high temperature electrolytic capacitor life for 8000 hours, according to a reduction of 10 degree electrolytic capacitor life budget method "pass, double life", then it work in 95 degree environment under the age of 16000 hours, in the work environment of life at 85 degrees for 32000 hours at 75 degrees under the environment of work life is 64000 hours, if the practice operation temperature lower, then life will be longer! It seems that only his high quality electrolytic capacitors for driving power supply is not what effect!
还有一点值得LED灯具公司留意：因为LED在作业过程中会放出很多的热量,使管芯结温敏捷上升,LED功率越高,发热效应越大.LED芯片温度的增加将致使发光器材功能的改动与电光变换功率衰减,严峻时乃至失效，依据试验测验标明：LED自身温度每上升5摄氏度，光通量就降低3%,因而 LED灯具必定要留意LED光源自身的散热作业，在也许的情况下尽量加大LED光源自身的散热面积,尽量降低LED自身的作业温度，假如条件答应，最佳能将电源有些与光源有些离隔，一味地寻求小体积而忽略灯具及电源的作业温度是不可取的。
It is also worth attention: because LED LED lighting company will release a lot of heat in the process of operation, the core node of Wen Minjie rise, LED power is higher, the larger the effect of increasing heating temperature of.LED chip will cause attenuation and electro-optic transform power light-emitting devices function changes, serious and even failure, on the basis of the experimental test indicated LED: every increase of 5 degrees Celsius temperature, heat flux is reduced by 3%, so must pay attention to work LED lamp LED light source itself, radiating area of LED light source itself as far as possible to increase in the case may be, as far as possible to reduce the operating temperature of LED, if the condition allows, best can supply some and some from the source isolation, blindly seeking small volume and ignore the lamp and power operation temperature is not desirable.
 

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