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LTC6813 Cell Balancing questions

		
	
				

			

									
					    SRavikumar205
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 17, 2020 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user inquired about the initialization sequence for cell balancing in the LTC6813, including sample code, PWM duty cycle configuration, discharge timer for balancing up to 10mV over 12 hours, and the impact on adjacent cells. The final answer indicated that the question was addressed in direct main support. The user observed a 2V drop across the balancing resistor for the targeted cell and a 17-18mV drop for the adjacent cell when cell balancing was enabled.
                        	    
    
                
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    Hi,
    

    We are implementing cell balancing using LTC6813. We have the following questions:
    

    

      

    • What is the initialization sequence for Cell balancing in LTC 6813? Where can I get sample code for the complete sequence? The sketchbook does not have the full sequence.
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    • How to configure the PWM duty cycle?
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    • What should be the Discharge timer for balancing the voltage of a cell by upto 10mV over a period of 12 hours?
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    • If cell balancing is enabled for cell Cn, what will be the impact on Cn-1? If we program, say, cell 4, to be balanced, we see a drop of around 2V across the balancing resistor for that cell. In addition, we see a drop of about 17-18mV across the balancing resistor for Cell 3 also. Why?
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    Thanks.