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ADuM4135 Production
The ADuM4135 is a single-channel gate driver specifically optimized for driving insulated gate bipolar transistors (IGBTs). Analog Devices, Inc., iCoupler...
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ADuM4135 on Analog.com

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ADUM4135 false FAULT signals latches device off

		            
		

			

									
					    Ducnanm
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 16, 2017 
				
			
			
		
    
		
     
				
		
    
		    		    
		    
		    	
			
    ADuM4135 going into error unexpectedly | EngineerZone   
    
 
    
  
    
   
    
    
    
     
    
      
    
       
      
        
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      We are using 4 off ADUM4135 in a power converter full bridge circuit, and are  seeing occasional FAULT signals, even though the DESAT pin is tied to GND2.
      
           
      We have VDD2 at 20V and VSS2 at -4V to drive SIC MOSFETs.
      
           
      Adding more decoupling right at the VDD2 pins didn't help, so we suspect some sort of radiated noise issue.
      
           
       
      
           
      To minimize some of the effects, we are considering linking the /FAULT and /RESET pins - any comments/ issues with that?
      
           
       
      
           
      Any support much appreciated.
      
           
      Thanks
      
           
       
      
           
      DM
      
          
      
         
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    Tags: 
                                            
                 Digital Isolation Technology
                
                                                    
                 Isolated Gate Drivers
                
                                                    
                 adum4135
                
                                
            
    
    
    

		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 16, 2017 6:23 PM
            
                                    
					
      
	
      

		
		
      
					
      The ISO5852S is a similar part to the ADuM4135, but as mentioned, there is a difference in drive strength. If you want a specific rise/fall time, the ADuM4135 uses a larger external series resistor than the ISO5852S, shifting more power dissipation outside the driver IC which is beneficial.
      
 
      Also, the ADuM4135 has tighter timing specs as compared to the competition, in terms of max propagation delay and propagation delay skew.
      
 
      RSchnell
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Nov 16, 2017 6:23 PM
            
                                    
					
      
	
      

		
		
      
					
      The ISO5852S is a similar part to the ADuM4135, but as mentioned, there is a difference in drive strength. If you want a specific rise/fall time, the ADuM4135 uses a larger external series resistor than the ISO5852S, shifting more power dissipation outside the driver IC which is beneficial.
      
 
      Also, the ADuM4135 has tighter timing specs as compared to the competition, in terms of max propagation delay and propagation delay skew.
      
 
      RSchnell
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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