A kind of full automatic charger circuit

Published:2011/4/19 4:25:00 Author:May | Keyword: full automatic charger | From:SeekIC

working principleDiagram 4-27 is the principle diagram of this charger. The voltage of LM339's pin 5 V5=6V. When the battery voltage E is less than 12V, V4 is less than 6V. LM339's pin 2 outputs high level. It can let 9013 saturation. 3AD30 is on amplified state. The measured value is 300mA when using heavy current to charge. When E≥12V, V5≥6V. LM339's pin 2 output low level. 9013 and 3AD30 is cut off. It adopts 40mA low current to charge to the battery. The curved line of measured charge current is shown in diagram 4-28.



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