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          EEPW首頁(yè) > 電源與新能源 > 設(shè)計(jì)應(yīng)用 > 基于MAX16834設(shè)計(jì)的112W升壓LED驅(qū)動(dòng)器技術(shù)

          基于MAX16834設(shè)計(jì)的112W升壓LED驅(qū)動(dòng)器技術(shù)

          作者: 時(shí)間:2010-08-16 來(lái)源:網(wǎng)絡(luò) 收藏


          圖6.DC/DC轉(zhuǎn)換器

          圖7.-降壓DC/DC轉(zhuǎn)換器

          全陶瓷電容的長(zhǎng)串參考

          boost driver for long strings of s using all ceramic capacitors

          This is a reference design for a 112.5W boost driver that uses the for long strings of LEDs. These long LED strings are commonly found in streetlights and parking garage lights.

          Input voltage: 24VDC ±5% (at 1.49A)

          VLED configuration: Two parallel strings. Each string consists of 19 WLEDs and a 5Ω resistor for current balancing. Current is 750mA per sting for a total of 1.5A into 75V.

          Dimming: 50μs (min) on-pulse for up to a 200:1 dimming ratio with a 100Hz dimming frequency

          圖8.升壓長(zhǎng)串LED參考外形圖

          圖9.112W升壓長(zhǎng)串LED參考電路圖

          112W升壓長(zhǎng)串LED驅(qū)動(dòng)器參考設(shè)計(jì)材料清單(BOM):

          本文引用地址:http://www.ex-cimer.com/article/180596.htm

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