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LT8390 Recommended for New Designs
The LT8390 is a synchronous 4-switch buck-boost DC/DC controller that regulates output voltage, input or output current from an input voltage above, below...
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LT8390 on Analog.com

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Question about LT8390



		

			

									
					    Kazu
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Dec 14, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  LT8390 
    
    		        		    		    	
			
    Hi,
    

    I am considering to use LT8390 with the following specs.
    

    Vin=18V to 28V
    

    Vout=24V, Iout=25A max  (Pout=600W max)
    

    

    Is it possible to use a single LT8390 for 600W buck/boost output? 　
    

    If so, what precautions should be taken in circuit design?
    

    If not, are there any products that can meet the above specs?
    

    Regards,
    

    Kazu
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 Datasheet/Specs
                
                                                    
                 lt8390
                
                                                    
                 External Power Switch Buck-Boost Controllers
                
                                                    
                 Buck-Boost Regulators
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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							FormerMember
					
      
		
      
			
													0
							
			
				
									FormerMember
							        
			
			
			
    
            
						
                            
            
            				
            
                on Dec 14, 2022 2:45 AM
            
            
					
    
	
    

		
		
    
					
    Hello Kazu,
    

    

    You can use LTpowerCAD to help you with your design requirement.
    

    These are some of the controllers that were suggested by LTpowerCAD when inputting your specs.
    

    

     
    

    

    Regards,
    

    Jhun
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    


	



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							FormerMember
					
      
		
      
			
													0
							
			
				
									FormerMember
							        
			
			
			
    
            
						
                            
            
            				
            
                on Dec 14, 2022 2:45 AM
            
            
					
    
	
    

		
		
    
					
    Hello Kazu,
    

    

    You can use LTpowerCAD to help you with your design requirement.
    

    These are some of the controllers that were suggested by LTpowerCAD when inputting your specs.
    

    

     
    

    

    Regards,
    

    Jhun
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    





Children
	
            
						
                            
            
            				
            
                on Dec 14, 2022 7:00 PM
            
            
												
						in reply to Kazu
					
									
    
	

		
		
    
					
    Hi Kazu,
    

    600W is achievable but you would have bulky components. Plus, you would need >2 MOSFETs in your control and sync MOSFETs since it is a single phase.
    

    The datasheet has computation guidelines on how to compute for your desired specifications. I would think you'd need a high inductor current >30A saturation. I have ever only seen Wurth inductors having these.
    

    

    Regards,
    

    Jhun