Diagram of lithium battery protection circuit based on Xysemi XB4251A

Published:2011/9/7 8:09:00 Author:Vicky | Keyword: lithium battery, protection circuit | From:SeekIC

Schematic of lithium battery protection devices is shown in the above picture, which is realized mainly by battery protection control IC , exterior discharging switch M1 and charging switch M2. When P+/P- end is connected with charger, M1 and M2 are all under conducting state when the battery is charged normally; when the control IC detects any abnormality during charging, M2 is then cut off and charging process stops. When P+/P- end is connected with load, M1 and M2 are all under conducting state when the battery is discharging; when the control IC detects any abnormality, M1 is cut off and discharging process stops. In addition, XB4301 cannot be reversely connected. XB4301 is mainly used in MP3 and Bluetooth at present, including partial mobiles, GPS application.



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