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	 > 模擬技術(shù) > 設(shè)計(jì)應(yīng)用 > RT8458 PWM Buck LED驅(qū)動(dòng)器應(yīng)用電路
          
    
          

          

          


	
	
	

          
	
          
		
          
			
          RT8458 PWM Buck LED驅(qū)動(dòng)器應(yīng)用電路
          
						
          
				作者：
				時(shí)間：2016-11-16
				來源：網(wǎng)絡(luò)
				
				
				
				
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          The RT8458 is a PWM controller with an integrated high side floating gate driver. It is used for step down converters by well controlling the external MOSFET and regulating a constant output current.
          The output duty cycle of the RT8458 can be up to 100% for wider input voltage application, such as E27 and PAR30 off-line LED lighting products.
          Features
          ? Low Cost and Efficient Buck Converter Solution
          ? Universal Input Voltage Range with Off-Line Topology
          ? Programmable Constant LED Current
          ? Dimmable LED Current by ACTL
          ? Output LED String Open Protection
          ? Output LED String Short Protection
          ? Output LED String Over Current Protection
          ? Built-in Thermal Protection
          ? TSOT-23-6 Package
          ? RoHS Compliant and Halogen Free
          Application
          ? E27, PAR30, Offline LED Lights

          Pin Configurations

          TSOT-23-6

          Typical Applications Circuit

          Figure 1. For Typical Application

          Figure 2. For High PF Application
          				             
				
            
                
			
							
          
                
			              
              
            
          
		
          
		
          
		
          
		
          
		
          
			
            
				
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          關(guān)鍵詞：
            			            RT8458
                        PWM
                        LED驅(qū)動(dòng)器
                        
            
          
            
			
          
		
          	
		

	

          
	
	
          
		
          
			
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