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LED是英文“LIGHTEMITTINGDIODE”的縮寫，中文簡稱發光二極管，因為它具有環保、壽數長、光電功率高(如今光效現已到達100LM/W)、抗震等很多長處，這些年在各行業使用得以敏捷開展，理論上，LED的使用壽數在10萬小時擺布，但在實踐使用過程中，有些LED燈具規劃人員對LED驅動電源知道缺乏或選用不妥或一味尋求低本錢，成果使LED燈具商品壽數大大縮短，差的LED燈具壽數不到2000小時，有的乃至更低，成果使LED燈具的優勢得不到極好的發揮。
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.
因為LED加工制作的特殊性，致使不一樣的出產廠家乃至同一個出產廠家在同一批商品中所出產的LED的電流、電壓特性均有較大的個體區別。現以大功率1W白光LED典型標準為例，依照LED的電流、電壓改動規則來做扼要闡明，通常1W白光使用正向電壓為3.0-3.6V擺布，也就是說，當標稱為1W的LED在流過350毫安電流時，它兩頭的電壓也許在3.1V，也也許在 3.2V或3.5V也也許是其它值，為確保1WLED的壽數，通常LED出產廠家主張燈具廠用350mA的電流去驅動，當經過LED兩頭的正向電流到達 350毫安后，LED兩頭的正向電壓很小的增加，都會使LED正向電流大幅度的上升，使LED溫度成直線上升，然后加快LED光衰，使LED的壽數縮短，嚴峻時乃至燒壞LED。因為LED的電壓、電流改動的特殊性，因而對驅動LED的電源提出了嚴厲請求。
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驅動電源是LED燈具的關鍵所在，它就比方一個人的心臟，要制作高品質的、用于照明的LED燈具有必要拋棄恒壓方法驅動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封裝廠將很多顆單個的LED經過并聯和串聯的方法將它們封在一同出產出了單個20W、30W或50W或100W乃至更高功率的LED，雖然在封裝前這些單個的LED都嚴厲做了挑選和配對，但因為內部數量少則有幾十顆、多則幾百顆單體LED,因而封裝后的大功率LED制品在電壓和電流上依然有很大的區別，且比較單個的LED(通常單個白光、綠光、藍光作業電壓在2.7-4V，單個紅光、黃光、橙光作業電壓在1.7-2.5V)參數區別更大!
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!

　當時很多廠家出產的LED燈類商品(比方護欄、燈杯、投射燈、庭院燈等)，選用阻、容降壓，然后加上一個穩壓二極管穩壓，向LED供電，這么驅動 LED的方法存在極大缺陷，首先是功率低，在降壓電阻上耗費很多電能，乃至有也許超越LED所耗費的電能，且無法供給大電流驅動，因為電流越大，耗費在降壓電阻上的電能就越大，無法確保經過LED電流不超越其正常作業請求，規劃商品時都會選用降低LED兩頭電壓來供電驅動，這么是以獻身LED亮度為價值的。選用阻、容降壓方法驅動LED，LED的亮度不能安穩，當供電電源電壓低時，LED的亮度變暗，供電電源電壓高時，LED的亮度變亮些。當然，阻、容降壓方法驅動LED的最大優勢是本錢低,因而如今依然有有些LED燈具公司在選用這種方法。
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.
有些廠家，為降低商品的本錢，選用恒壓驅動LED，相同帶來了批量出產時每個LED發光亮度不均勻、LED不能作業于最佳狀態等一系列問
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
恒流源驅動是最佳的LED驅動方法，選用恒流源驅動，不用在輸出電路串聯限流電阻，LED上流過的電流也不受外界電源電壓改動、環境溫度改動，以及LED參數離散性的影響，然后能保持電流安穩，充沛發揮LED的各種優秀特性。
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.
選用LED恒流電源來給LED燈具供電，因為在電源作業時期都會自動檢測和控制流過LED的電流，因而，不用憂慮在通電的剎那間有過高的電流流過LED，也不用憂慮負載短路燒壞電源。
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.
選用恒流驅動方法，它能防止LED正向電壓的改動而引起電流改變，同時安穩的電流使LED的亮度安穩，也便于LED燈具廠施行大批量出產時確保商品的一致性，因而很多廠家現已充沛知道到驅動電源的重要性，很多LED燈具廠家現已拋棄恒壓方法，而選用本錢稍高的恒流方法驅動LED燈具了。
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.
有些廠家憂慮電源驅動板選用電解電容會影響電源的壽數，其實是一種誤解，比方：假如選用105度，壽數為8000小時的高溫電解電容，依據通行的電解電容壽數預算方法“每降低10度，壽數增加一倍”，那么它在95度環境下作業壽數為16000小時，在在85度環境下作業壽數為32000小時，在75度環境下作業壽數為64000小時，假如實踐作業溫度更低，那么壽數會更長!由此看來，只需選用高品質的電解電容對驅動電源的壽數是沒有什么影響的!
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!
還有一點值得LED燈具公司留意：因為LED在作業過程中會放出很多的熱量,使管芯結溫敏捷上升,LED功率越高,發熱效應越大.LED芯片溫度的增加將致使發光器材功能的改動與電光變換功率衰減,嚴峻時乃至失效，依據試驗測驗標明：LED自身溫度每上升5攝氏度，光通量就降低3%,因而 LED燈具必定要留意LED光源自身的散熱作業，在也許的情況下盡量加大LED光源自身的散熱面積,盡量降低LED自身的作業溫度，假如條件答應，最佳能將電源有些與光源有些離隔，一味地尋求小體積而忽略燈具及電源的作業溫度是不可取的。
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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