Products Mentioned

MAX17332 Recommended for New Designs
The MAX17332 is a 35μA IQ stand-alone charger, fuel gauge, protector, and battery internal self-discharge detection IC for 1-cell lithium-ion/polymer...
Datasheet
MAX17332 on Analog.com

Associated Drivers

  • State Verified Answer
  • Replies 1 reply
  • Subscribers 4 subscribers
  • Views 247 views
  • Users 0 members are here
Options
Related 

        

            Post
             Go back to editing
        

    

    


    

    









		












	
	
			
	
			
		
	
	
		

		
MAX17332 with non-rechargeable 3V battery



		

			

									
					    Stasian
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Feb 22, 2024 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  MAX17332  
    
    		        		    		    	
			
    Hi!
    

    

    We have a new project with non-rechargeable 3V battery (2.5V-3.0V).
    

    We already have working drivers for MAX17332 that is why I want to use it for:
    

    1.Current sense
    

    2.Voltage sense
    

    3.Temp sense
    

    3.OVC protection
    

    Main thing it is non-rechargeable, what is easiest way to disable charge?
    

    Maybe I will not use discharge and charge function to save consumption (so MAX17332 will be usually in deepship for rare updates on battery state), may I just bypass FETs with 0R?
    

    Maybe AD has better solution for such batteries, I prefer lower active current (device should live from CR2032 battery for half year, so consumption is critical)
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 hardware
                
                                                    
                 Battery Fuel Gauge and Coulomb Counter
                
                                                    
                 MAX17332
                
                                                    
                 battery management
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

    • 
	
      



	
			
		
	



      
	
      
		
      
							
					
      
		
      
			
													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Feb 23, 2024 8:01 PM
            
            
					
      
	
      

		
		
      
					
      Hi Stas, 
      

      For this, there are a few potential solutions. If you want to keep the MAX17332, then I would suggest either removing the FETs or enabling manual charging (Config.ManChg) and setting the ChargingCurrent (0x028) and nIChgCfg1/2(0x1CE and 0x1CF) registers to 0x0000. This should fully disable any charge current.
      

      However, I would recommend considering a smaller IC for use instead of the MAX17332 if you're only looking for the ModelGauge algorithm and are uninterested in the other features. Some other ICs that I would suggest would be the MAX1726X family or the MAX1730X family. 
      

      Thanks and please let me know if that works for you!
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

      •