LED路燈驅(qū)動(dòng)解決方案簡(jiǎn)化設(shè)計(jì)

　　由于電力、維修和更換費(fèi)用，路燈往往是市政當(dāng)局最高的運(yùn)營(yíng)費(fèi)用之一。因此，處理像路燈這樣的大功率燈具對(duì)于設(shè)計(jì)者來(lái)說(shuō)是一個(gè)挑戰(zhàn)，因?yàn)樗麄兿Ｍ?jiǎn)化和降低照明設(shè)備的成本。由于LED照明燈具的移動(dòng)主要是由節(jié)約能源所驅(qū)動(dòng)的，LED驅(qū)動(dòng)器的效率是另一個(gè)關(guān)鍵問(wèn)題，因?yàn)閷?duì)LED照明設(shè)備的狀態(tài)監(jiān)控的需求日益增長(zhǎng)。

　　LED驅(qū)動(dòng)IC制造商在以下幾個(gè)方面對(duì)這些問(wèn)題作出了回應(yīng)。一種方法是開(kāi)發(fā)解決方案，將單個(gè)組件中的幾個(gè)被動(dòng)組件集成起來(lái)，以簡(jiǎn)化設(shè)計(jì)過(guò)程。它們還使設(shè)計(jì)者更容易平衡多線程解決方案中的當(dāng)前問(wèn)題，并包含諸如調(diào)光、測(cè)光和故障狀態(tài)等高級(jí)功能。

　　在一個(gè)例子中，LED驅(qū)動(dòng)器消除了降壓變壓器在電壓轉(zhuǎn)換中的需要，簡(jiǎn)化了電源轉(zhuǎn)換為更低的電壓。在另一種情況下，一個(gè)高度集成的LED驅(qū)動(dòng)器只需要兩個(gè)無(wú)源元件，一個(gè)電阻和一個(gè)電容器來(lái)驅(qū)動(dòng)一串發(fā)光二極管。

　　LED driver manufacturers say the most common power supply used for multi-string streetlights are 48 V AC/DC power supplies that supply constant current. However， there are several choices of LED drivers that also can be used in these applications including switch-mode LED drivers and linear LED drivers.

　　Because there are several flavors of IC drivers， the right choice for streetlights rests partly with an OEM‘s capability – that is， if it can build an AC/DC power supply solution on its own or if it needs to buy an off-the-shelf product. A designer’s preference also plays a significant role.