Cxlb7358 is a PWM step-down mode single lithium iron phosphate battery charging management integrated circuit that can be powered by solar panel. It can independently manage the charging of single lithium iron phosphate battery. It has the advantages of small package, less peripheral components and simple use. The cxlb7358 has trickle, constant current and constant voltage charging modes, which is very suitable for lithium iron phosphate battery charging management. In constant voltage charging mode, cxlb7358 modulates the battery voltage to 3.625v; 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 deeply discharged batteries, when the battery voltage is lower than 66.5% of the constant voltage charging voltage (typical value), 17.5% of the constant current charging current set by cxlb7358 will 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 91.66% of the constant voltage charging voltage, a new charging cycle will start automatically. When the input power supply is powered down or the input voltage is lower than the battery voltage, cxlb7358 moves into sleep mode.