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ADUM4146 Recommended for New Designs
The ADuM4146 is a single-channel gate driver specifically optimized for driving silicon carbide (SiC), metal-oxide semiconductor field effect transistors...
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ADUM4146 on Analog.com

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Current rating of the ADuM4146 Gate Sense pin

		
	
				

			

									
					    naohisa
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Mar 25, 2025 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  ADUM4146  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hi,
    

    My customer is considering the ADuM4146.
    

    I believe the ADuM4146 has a built-in MOSFET for Miller clamping, but what is the current rating of the Gate Sense pin?
    

     
    

    

    

    Best Regards,
    

    Naohisa
    
			
    
			
									
		                             
                        

    
    
                                            
                 Datasheet/Specs
                
                                                    
                 Digital Isolation Technology
                
                                                    
                 Isolated Gate Drivers
                
                                                    
                 ADuM4146
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Mar 26, 2025 6:02 AM
            
            
						
			            		
      
		
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      Hello Naohisa,

      As per datasheet spec the Miller clamp RDSON is approximatively 2x the RDSON of the driving stage pull-down. 
      So you should expect approximatively 1/2 peak current capability compared to the driving stage pull-down peak current.   

      However, the key parameter to consider in the design phase is the Internal Miller Clamp Resistance that you can find in the spec table.
      This parameter indicate the pull-down strength, and so it is used to determine the expected Vgs "bump" amplitude caused by the Miller effect.

      Thanks,
      Luca  
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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