簡單辨別電源差異第二期（規格參數篇）

　　上期為大家分享了從電源外觀絲印辨別電源差異，今天為大家分享更詳細的如何在沒有拿到產品時，通過規格書輸出、輸入、保護、應用環境參數辨別產品差異。

　　We have already had a rough understanding on how to identify driver’s performance difference from its label and appearance. And today we are going to share with you a new method to identify driver’s performance difference when we haven’t received the driver—parameters such as output, input, protection, application environment and so on.

　　01

　　輸出參數 Output parameters

　　這里就可以確認該電源產品的電壓電流等是否與自己燈具參數匹配，其中還可關注以下幾點：

　　From driver’s output parameters such as output current, output voltage and so on, we can confirm whether they match for the parameters of light fixture. Except for the mentioned parameters, we can also pay attention to the following ones:

　　①頻閃：

　　相信大家都了解頻閃的危害，具體參數可以有多種表示，如波動深度、紋波電流等。其中萊福德頻閃指標是參照Erp和教育照明要求，考核Pst、SVM、波動深度等，判斷是否滿足無頻閃要求。

　　(1) Flicker

　　As we all know, flicker does harm to our eyes, and its specific parameters can be expressed in a variety of ways, such as fluctuation depth, ripple current and so on. Among them, parameters such as Pst, SVM, fluctuation depth and so on are involved in the flicker index of Lifud LED driver based on the requirements of ErP and educational lighting, and we can tell if the driver meets the flicker-free standard according to the above parameters.

　　②電流精度：

　　輸出電流的上下浮動值，精度越高波動范圍越小，批量時所有燈具的亮度一致性也就會更好。

　　(2) Current tolerance

　　It is the fluctuation value of driver’s output current, and the higher the accuracy is, the smaller the fluctuation will be, and the better the brightness consistency of all light fixtures in batch mode can be.

　　③溫度漂移：

　　環境溫度變化時引起的參數變化，波動過大甚至可能導致使電路無法正常工作，一般市場常見為±15%，萊福德產品基本滿足在±5~10%。

　　(3) Temperature drift

　　The fluctuation of parameters is susceptible to the ambient temperature change, and if this fluctuation is excessive, the circuit of LED driver may fail to work. It is common when the fluctuation ranges from -15% to +15%, but the fluctuation of Lifud LED drivers’ parameters ranges between ±5% and ±10%.

　　02

　　輸入參數 Input parameters

　　包含輸入電壓、電流、浪涌等參數，針對高壓、低壓及全電壓(如美國工業用電)等不同地區，電壓范圍要求有所不同，一般電壓越寬可適應的地區越廣，但相應成本也就越高。

　　It consists of input voltage, input current, surge and other parameters. And different areas such as high voltage area, low voltage area, full voltage area (such as industrial electricity in the United States) and so on have different requirements on the voltage range. Generally speaking, wider voltage can be adapted to a wider area, but the corresponding cost is also higher.

　　▼世界各地區常用電壓(AC)

　　Common voltage in different regions across the world (AC)

　　注：同一國家的輸入電壓因不同城市或不同地域可能不同，如美國、巴西

　　Note: the input voltage in the same country may be different due to different cities and regions.

　　萊福德輸入額定電壓分為220-240 / 100-277 / 120-347Vac多種范圍，極限電壓可到198-264 / 90-305 / 108-380Vac(不同產品有細微差異)。其中針對應急照明狀態，萊福德多數產品都設計了可在DC直流輸入下使用。

　　The rated input voltage of Lifud LED drivers is available in a wide range of 220-240Vac, 100-277Vac and 120-347Vac, and the voltage limit ranges among 198-264Vac, 90-305Vac and 108-380Vac (different products have slight differences). In case of emergency, most of Lifud LED drivers can be used with DC input.

　　其他效率及功率因素等參數，在上篇分享中有詳細談到，小編這里就不再重復。

　　As for efficiency, PF and other parameters we mentioned last time, please check the previous text for more information.

　　03

　　保護及應用環境

　　3.Protection and application environment

　　該項主要體現了產品擁有的保護特性和可應用的環境范圍，如萊福德每款產品必備的開路短路保護，可以保護對應異常電路下電源，使其性能不受損害。

　　These two parts mainly reflect the protection characteristics of an LED driver and the environment scope in which an LED driver can be applied. For example, the open circuit protection and short circuit protection that are specified in every Lifud LED driver’s specification are aimed at protecting the performance of LED driver when the driver works in the abnormal circuit.

　　其中工作溫度需重點注意，因過高的溫度易使產品發生不良，而導軌內置等高溫應用環境建議大家選擇工作溫度可達+50℃及以上的電源，如萊福德高端導軌專用的圓形系列LF-GICxxxYS，最高可應用在60℃溫度下。

　　When it comes to the application environment, please pay attention that the operating temperature not be too high because the driver may fail to work in the high temperature. As for the application environment of built-in track light LED driver, it is recommended that its operating temperature reach +50℃ and above. For example, Lifud high-end track light LED driver LF-GICxxxYS can work in the highest temperature of 60℃.

　　針對應用環境，萊福德產品都經過了如冷熱沖擊試驗、高/低溫儲存&運行、雙85實驗、壽命加速實驗等近20項嚴苛的環境可靠性測試，以保證產品在規格書所示環境中的良好運行。

　　In order to ensure that all of Lifud LED drivers can work well as the descriptions in their specifications before shipment, they have to “suffer from” nearly 20 rigorous environment reliability tests, such as thermal shock test, high/low temperature storage & operation tests, “double 85” test, lifetime acceleration test, etc.

　　▼萊福德環境可靠性實驗室

　　Lifud environment reliability laboratory

　　04

　　安全與電磁兼容 Safety and EMC

　　上次給大家科普了各項認證的重點應用區域及對應側重項，想要了解的朋友可查看萊福德往期分享。今天該項就詳細說明了產品各性能具體滿足哪些認證及其對應的標準號。

　　Last time we shared with you the main application areas and items of different certifications. Please check Lifud previous text for more details. And today we are going to further explain what certifications can different LED drivers’ performances meet and the corresponding standard numbers.

　　▼點擊下圖跳轉上期詳情

　　Click the following picture to check the previous text

　　如萊福德該款產品通過了TUV-ENEC、CCC、RCM、CE、CB等認證。其中ENEC認證主要采用標準為EN61347-1:2015，EN 61347-2-13:2014/A1:2017，EN 62384：2016/A1:2009。

　　For example, this Lifud LED driver has been certified by TUV-ENEC, CCC, RCM, CE, CB, etc. And among these certifications, the standards of ENEC are EN61347-1:2015, EN 61347-2-13: 2014/A1:2017, EN 62384: 2016/A1: 2009.

　　05

　　其他說明 Other parameters

　　萊福德規格書此項主要包含IP等級、RoHS標準、質保等說明。

　　This part mainly includes IP rating, RoHS standard, warranty condition, etc.

　　其中：

　　質保說明“5年(Tc ≤80.5℃)”，表示該產品5年壽命質保是在Tc ≤80.5℃的條件下，具體不同應用溫度下的壽命情況還可參照規格書中壽命曲線查看。

　　Among them, the warranty condition “5 years (Tc≤80.5℃)” means that the 5-year warranty service of this LED driver is valid on the condition that the casing temperature of the driver is not more than 80.5℃. For more information about the lifetime condition of an LED driver in different application temperature, please check the lifetime curve in the specification for reference.

　　▼壽命曲線圖參考如下

　　Lifetime curve for reference

　　萊福德產品基本都是5年及以上質保，且計算方式為產品每天24H連續工作5年，按照日常使用情況，萊福德產品多可達十年壽命，感興趣的朋友可點擊下圖跳轉往期分享，查看萊福德產品十年應用案例驗證。

　　Basically, Lifud LED drivers are guaranteed for 5 years or more, and the 5-year lifetime is calculated on the condition that the LED driver continuously works 24/7 for 5 years. In theory, on the condition of working 8 hours a day and 365 days a year, a Lifud LED driver with 5-year warranty can be used for up to 10 years. For more information about 10-year utilization of Lifud LED driver, please click the following picture to check the previous text.

　　▼點擊查看十年應用案例詳情

　　Click it to check more details about 10-year utilization of Lifud LED driver

　　RoHS標準全稱《電氣、電子設備中限制使用某些有害物質指令》，是一種全球認可的環境保護標準，針對該項萊福德基本所有產品都符合 RoHS 2.0(EU)2015/863。

　　As a globally recognized environment protection standard, the full name of RoHS Standard is “Directive on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment”. And basically all of Lifud LED drivers conform to RoHS 2.0 (EU) 2015/863.

    更多信息請查看企業專區：http://m.vmlcwjnjqx.com/cp55214