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    金年会·(中国)_金年会
    


	

    
    
    
        
    
            
    
                
            
    
            
    
        
    
    
    

    

    
    
    
        
    


            
            
    
                
                        
                
                
    
                    
    
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    SD7800
    
					
    SINGLE STAGE PRIMARY SIDE REGULATION PFC CONTROLLER FOR LED DRIVER
    
					
				
    
				
    
					
    
												
    
							
							
    
								
        The SD7800 is a single stage primary side regulation (PSR) power factor correction (PFC) controller, specially designed for flyback LED driver.
        The SD7800 provides accurate constant current control and operates in boundary conduction mode (BCM) with high efficiency. The Device adopts primary side regulation eliminating the opto-couple, secondary feedback control and loop compensation for reducing design and cost.
        The SD7800 adopts constant on time operation to achieve high power factor. Due to patented close-loop control technology pin COMP and peripheral compensation network are unnecessary, and output current will not be affected by moisture or leakage current; thanks to patented THD technology, low THD is obtained without optimized THD network in most applications.
        The SD7800 provides completed protections such as input over voltage protection, input under voltage protection, LED short protection, LED open protection, cycle-by-cycle current limiting, and four section high temperature drop current and over temperature protection setting, etc.

    							
    
						
    
																		
    
							
    Main feature
    
							
    
								
    • PSR flyback topology
    • Boundary Conduction Mode
    • Constant on time control
    • Patented close-loop technology to prevent moisture and leakage, peripheral compensation network is unnecessary
    • Patented THD optimized technology without need of peripheral optimized network
    • VCC over voltage protection and VCC under voltage lockout
    • Input over voltage protection and input under voltage protection
    • Cycle-by-cycle current limiting and peak current compensation
    • LED short protection and LED open protection 
    • Four section high temperature drop current setting
    • Four section over temperature protection setting

    							
    
						
    
																		
    
							
    Ordering Information
    
							
    
								
    
									
										
    
											Product Name
											Package form
											Marking
											Hazardous Substance Control
											Packing Type
											Remarks
										
    
									    
									
																				
    
											SD7800
											SOP-8-225-1.27
											/
											Halogen free
											Tube
											
										
    
																				
    
											SD7800TR
											SOP-8-225-1.27
											/
											Halogen free
											Tape & reel
											
										
    
																			    
								
    

							
    
						
    
																		
    
							
    Block Diagram
    
							
    
								
    SD7800  中英文同.png
    							
    
						
    
																								
											
    
				
    
			
    
		
    
	
    
    



    




		

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