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short circuit  protection on buck DC/DC converter LTC3892-1



		

			

									
					    mingtian
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 26, 2020 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi everyone
    

        I am design a abuck dc/dc(LTC3892-1) converter、the output is 14V 36A，When I do the short circuit protection test, the BG1 pin burns out， I want to know if LTC3892-1 has short circuit protection？
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                        
                on Dec 7, 2020 9:20 AM
            
            
					
      
	
      

		
		
      
					
      Hi mingtian,
      

      As stated on page 16 of datasheet, there should be foldback current for short-circuit protection. You are building a 500W converter which is not easy to do.  I assume you started by doing your own board. We usually recommend to start with a working design especially if you don't have power design experience. DC2190A-A demo board is a good way to start.
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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