CXLB73221 series is a dual lithium battery charge management chip. The chip includes charging state detection, charging process, temperature detection, etc., and also integrates a high-precision reference voltage module. The chip is packaged in SOP-8. CXLB73221 charging includes three modes: pre-charging, constant current charging, constant voltage charging. When constant current charging, the current is 5 times of the pre-charging current. When the voltage is lower than 6.5, the pre-charging state; When the voltage is higher than 6.5V, it enters the constant current charging mode. At this time, the charging current is 5 times of that during pre-charging. The size of the charging current is set by an external resistor.
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[ CXLB73221 ]"
