摘要：LED照明由于具有發(fā)光效率高、工作壽命長(zhǎng)、啟動(dòng)時(shí)間短、使用安全等一系列優(yōu)點(diǎn)，在室內(nèi)外照明領(lǐng)域得到了廣泛的應(yīng)用。但是，LED的正向工作電壓只有3V--4V，并且正常使用時(shí)為得到足夠的lm輸出，需多只LED串聯(lián)、并聯(lián)使用。這就出現(xiàn)了LED負(fù)載與驅(qū)動(dòng)電源之間的電壓和電流匹配問(wèn)題。如果兩者之間匹配的好則可以有效地發(fā)揮LED的性能指標(biāo)。 敘詞：LED 驅(qū)動(dòng) 工作效率 Haitz定律 標(biāo)準(zhǔn) 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