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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)

							
				
				
				
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          圖6.MAX16834升壓DC/DC轉(zhuǎn)換器

          圖7.MAX16834升壓-降壓DC/DC轉(zhuǎn)換器

          全陶瓷電容的112W升壓長(zhǎng)串LED驅(qū)動(dòng)器參考設(shè)計(jì)

          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(zhǎng)串LED驅(qū)動(dòng)器參考設(shè)計(jì)外形圖

          圖9.112W升壓長(zhǎng)串LED驅(qū)動(dòng)器參考設(shè)計(jì)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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