LED驅(qū)動(dòng)器集成MOSFET，電路保護(hù)，以減少設(shè)計(jì)復(fù)雜度。

　　LED驅(qū)動(dòng)器集成MOSFET，電路保護(hù)，以減少設(shè)計(jì)復(fù)雜度。

　　工程師面臨的最大挑戰(zhàn)之一是如何在不犧牲性能或功能的前提下簡(jiǎn)化設(shè)計(jì)。對(duì)于LED照明，設(shè)計(jì)師們會(huì)很好地評(píng)估他們的LED驅(qū)動(dòng)器選項(xiàng)非常密切。這些驅(qū)動(dòng)程序集成了多個(gè)組件，包括MOSFET和電路保護(hù)裝置，以及其他功能，使設(shè)計(jì)更簡(jiǎn)單。

　　在所有組件集成的情況下，總是有權(quán)衡，但哪些設(shè)計(jì)師可以忍受的是由每個(gè)單獨(dú)的應(yīng)用程序決定的。LED驅(qū)動(dòng)集成的兩個(gè)最大問(wèn)題是缺乏靈活性和散熱問(wèn)題。

　　在這篇文章中，我們將看一個(gè)AC / DC和DC / DC LED驅(qū)動(dòng)器的樣品，承諾減輕設(shè)計(jì)的復(fù)雜性，節(jié)省空間，加快上市時(shí)間。例如，許多LED驅(qū)動(dòng)白熾燈泡替代應(yīng)用集成1或4 MOSFET，這不僅簡(jiǎn)化設(shè)計(jì)和減少設(shè)計(jì)時(shí)間，還節(jié)省電路板空間和成本削減物料清單（BOM）通過(guò)無(wú)需外部元件。這些部分也滿足了系統(tǒng)電路保護(hù)的要求結(jié)合過(guò)熱保護(hù)，欠壓鎖定，熱關(guān)斷等保護(hù)功能，提高了系統(tǒng)的可靠性。最后，這些驅(qū)動(dòng)程序通過(guò)縮短設(shè)計(jì)和合格周期來(lái)加快產(chǎn)品的發(fā)布速度。

　　“When everything is integrated， it‘s very good for the mass market because it’s very easy to design with and ［the part］ offers a very small form factor，” said Jim Patterson， systems and applications manager， Lighting Power Products， Texas Instruments， Inc. “That combination makes time to market much quicker， because issues like EMI performance have already been well tested in the package.”

　　Patterson also admits “retrofit lamps are a difficult market due to the size constraints，” adding that “you‘re taking a light bulb， such as a MR16 or GU10， in very small two-inch-diameter envelopes that have to fit all the electronics.”