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LTC4373 Recommended for New Designs
The LTC4372/LTC4373 are positive high voltage ideal diode controllers that drive an external N-channel MOSFET to replace a Schottky diode. They control...
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LTC4373 on Analog.com

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Ideal Didoe LTC4373



		

			

									
					    hamed
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 25, 2020 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    I wanted to design a circuit to select a battery pack between three packs. batteries nominal voltage is 48V and there are two main packs and an auxiliary pack for failure situations. by powering on the system one of the main packs should be used until its voltage drops to 40V and then the second main pack should be inserted into the circuit. So, I need a prioritized ideal diode for achieving the mentioned specification. I wonder if you could guide me to select a suitable component in this regard.
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      •  Super User  
      
            
			                            
                        
                on Dec 11, 2020 9:34 AM
            
            
					
      
	
      

		
		
      
					
      Hi Hamed,
       Unfortunately, we do not have a 48V prioritizer that can manage three supplies, but will note your interest in such a product.
       You could make a 48V prioritizer using an LTC4359 on each battery as a load switch, and then use a couple LTC2965s to monitor undervoltage and enable the appropriate battery.
       I built the described circuit in LTSpice to simulate your application. I'll have it posted shortly from another account.
       
       -Aaron
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      •  Super User  
      
            
			                            
                        
                on Dec 11, 2020 9:34 AM
            
            
					
      
	
      

		
		
      
					
      Hi Hamed,
       Unfortunately, we do not have a 48V prioritizer that can manage three supplies, but will note your interest in such a product.
       You could make a 48V prioritizer using an LTC4359 on each battery as a load switch, and then use a couple LTC2965s to monitor undervoltage and enable the appropriate battery.
       I built the described circuit in LTSpice to simulate your application. I'll have it posted shortly from another account.
       
       -Aaron
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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