摘要：LED照明由于具有發光效率高、工作壽命長、啟動時間短、使用安全等一系列優點，在室內外照明領域得到了廣泛的應用。但是，LED的正向工作電壓只有3V--4V，并且正常使用時為得到足夠的lm輸出，需多只LED串聯、并聯使用。這就出現了LED負載與驅動電源之間的電壓和電流匹配問題。如果兩者之間匹配的好則可以有效地發揮LED的性能指標。 敘詞：LED 驅動 工作效率 Haitz定律 標準 Abstract： LED lighting has lighting efficiency is high, working life is long, using safely etc advantages, LED lighting has been got widely used in the lighting fields. But LEDs forward drop voltage only has 3V--4V, and in the using needs more LED in series or parallel. This produces a problem how to pair the LED load and the LED driver in current and voltage, if the LED load and the LED driver in current and voltage pair correctly, then LED load can work in good condition. Keyword：LED, Driver, working efficiency, Haitz Law, standard