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EEPW首頁(yè) > 電源與新能源 > 設計應用 > 基于MAX16834設計的112W升壓LED驅動(dòng)器技術(shù)

基于MAX16834設計的112W升壓LED驅動(dòng)器技術(shù)

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


圖6.MAX16834升壓DC/DC轉換器

圖7.MAX16834升壓-降壓DC/DC轉換器

全陶瓷電容的112W升壓長(cháng)串LED驅動(dòng)器參考設計

112W boost driver for long strings of LEDs using all ceramic capacitors

This is a reference design for a 112.5W boost LED driver that uses the MAX16834 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8.112W升壓長(cháng)串LED驅動(dòng)器參考設計外形圖

圖9.112W升壓長(cháng)串LED驅動(dòng)器參考設計電路圖

112W升壓長(cháng)串LED驅動(dòng)器參考設計材料清單(BOM):

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