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ADP1074 Recommended for New Designs
The ADP1074 is a current mode, fixed frequency, active clamp, synchronous forward controller designed for isolated dc to dc power supplies. Analog Devices...
Datasheet
ADP1074 on Analog.com

ADP1071-2 Production
The ADP1071-1/ADP1071-2 are pulse-width modulation (PWM) current mode fixed frequency synchronous flyback controllers designed for isolated dc-to-dc power...
Datasheet
ADP1071-2 on Analog.com

ADP1074 Recommended for New Designs
The ADP1074 is a current mode, fixed frequency, active clamp, synchronous forward controller designed for isolated dc to dc power supplies. Analog Devices...
Datasheet
ADP1074 on Analog.com

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Are there models of ADP1074 and ADP1071-2 for LTSPICE available?



		

			

									
					    dbaldor
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 27, 2018 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Are these models available?  If not what would be the closest part that I can use?  Also do you have any suggested reading on synchronous flyback vs synchronous forward (with active clamp) topologies?  I am trying to decide which most appropriate for this design.  It would be good to find some info which helps you choose appropriate parts for the power stage (transformer, mosfets ect).
    
 
    Thanks,
    
 
    Dan Baldor
    
									
			        
		
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on Jul 5, 2018 9:14 PM
            
            
					
      
	
      

		
		
      
					
      Hi, 
      
 
      The main difference between the two designs are the transformer and FETs (primary and secondary). If you use the same power stage you should get the same efficiencies.
      
 
      Regarding the snubbers, the snubber in the UG from the previous post uses and RCD snubber as opposed to only an RC snubber on this link http://www.analog.com/media/en/technical-documentation/eval-board-schematic/DC2539A-2-A-SCH.PDF The snubber for the secondary FET is also less aggressive in my opinion but that is a designers choice. If all things remain equal you should definitely get the same efficiencies.
      
 
      One other thing is that the switching frequency is 300k vs 250k in the two designs so that also explains as to why the efficiency is slightly lower. 
      
 
      Your decision should be on how many external components are required in the total BOM.
      
 
      Lt Comm Data.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
			                            
                        
                on Jul 5, 2018 9:14 PM
            
            
					
      
	
      

		
		
      
					
      Hi, 
      
 
      The main difference between the two designs are the transformer and FETs (primary and secondary). If you use the same power stage you should get the same efficiencies.
      
 
      Regarding the snubbers, the snubber in the UG from the previous post uses and RCD snubber as opposed to only an RC snubber on this link http://www.analog.com/media/en/technical-documentation/eval-board-schematic/DC2539A-2-A-SCH.PDF The snubber for the secondary FET is also less aggressive in my opinion but that is a designers choice. If all things remain equal you should definitely get the same efficiencies.
      
 
      One other thing is that the switching frequency is 300k vs 250k in the two designs so that also explains as to why the efficiency is slightly lower. 
      
 
      Your decision should be on how many external components are required in the total BOM.
      
 
      Lt Comm Data.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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