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LTC7060 for >60V synchronous application



		

			

									
						Andrew Lee - TW
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Apr 13, 2020 
				
			
			
		


				
		

		    		    
		    
		    	
			
since LTC7060 has floating ground and inverting input logic feature. is there any application using LTC7060 for LED driver like LT3756 or LTC3783.


I feel it can upgrade these non-synchronous boost regulator to synchronous one. can it work for these app?

								


				
				
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	














	

	

					



			


				
	









	
    
	

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                                 Analog Employees 
                                
                            
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                on Apr 13, 2020 3:32 PM
            
            
					
    
	
    

		
		
    
					
    As described in DS, the LTC3783 is a non-synchronous LED driver, so I cannot recommend it of using it any other way. You might be better off using a formal  synchronous LED driver. Generally speaking, though, there's possibility of using LTC3783 with an external LTC7060 driver. The main problem will it's biasing and the dead time. If it's short, then shoot-through current affects functionality and if its long then efficiency is low. Also, the FET parameters variation should be taking in account. If you still want to pursue this idea, the best way to proceed is for you to design a detailed electrical schematic and communicate with local ADI representative. 
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    

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