The cxlb7206 is a PWM Buck mode single lithium battery charging management integrated circuit that can be powered by solar panel. It can independently manage the charging of single lithium battery. It has the advantages of small footprint, few peripheral components and simple use.
With trickle, constant current and constant voltage charging modes, the cxlb7206 is very suitable for lithium battery charging management. In constant voltage charging mode, cxlb7206 modulates the battery voltage to 4.2V; in constant current charging mode, the charging current is set through an external resistance. When the current output capacity of the input power is reduced, the internal circuit can automatically track the maximum power point of the solar panel. The user does not need to consider the worst case, and can maximize the output power of the solar panel, which is very suitable for the application of solar panel power supply. For deep discharge lithium batteries, when the battery voltage is lower than 66.5% of the constant voltage charging voltage (typical value), cxlb7206 uses 17.5% of the constant current charging current set to trickle charge the battery. In the constant voltage charging stage, the charging current decreases gradually. When the charging current decreases to 16% of the constant current charging current, the charging ends. At the end of charging state, if the battery voltage drops to 95.5% of the constant voltage charging voltage, a new charging cycle will start automatically.