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Could you help pick up suitable solution for charger application

Jimmy WANG
Genius 4025 points
Other Parts Discussed in Thread: BQ25792, TPS63060, TPS63070

Hi team,

My customer wants to design for Super Cap charger

Vin=5V@2A(max) VO=14.4V Io=0.7A(or less 0.7A). due to Iin limitation.

Does TI have a suitable solution for this spec? or any discrete circuit to achieve the design? thanks!


								


				
				

				
			

		

			
						
									
                			    			                        
						
						
			
			
						
			                        
			
			
				
			  
			

			     
			

		


				    			

						
















	

	

					
    
	
    





		
	
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                          TI__Guru****
                        165786 points
                      
    
                          
                   		
		
    
					
    Hi Jimmy,
    

    TI does not have a single IC standalone, boosting super-cap charger solution.  The BQ25792 buck-boost charger would work but requires host control and has trickle and pre-charge which until the cap voltage is high enough, which extends charge time.  If your super cap does not require trickle/pre charge (most do not) and since your charge current seems flexible, I recommend using a boost converter running in current limit.  I have move this post to the boost converter team.
    

    Regards,
    

    Jeff
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    

	            
                 	
	
    
				
		                
                
                
                
                
                
                
        		
		
				
    
			
		
    
		
		 
		
		
     
    
	
    

    
			
    
			
    
		
    

		
    
	
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                          TI__Guru
                        65170 points
                      
    
                          
                   		
		
    
					
    Hello Jimmy,
    

    Have a look at this app note https://www.ti.com/lit/an/slva676/slva676.pdf
    

    You could replace TPS63060 with TPS63070 for a somewhat higher voltage level.
    

    Best regards,
    Brigitte
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    

	            
                 	
	
    
				
		                
                
                
                
                
                
                
        		
		
				
    
			
		
    
		
		 
		
		
     
    
	
    

    
			
    
			
    
		
    

		
    
	
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