Charging and discharging control circuit

The utility model relates to the technical field of power supplies, in particular to a charging and discharging control circuit. Comprising a step-down input module, a charging management module and a rectification boost module, the input end of the step-down input module is connected with a DC power supply, the output end is connected with the input end of the charging management module, the output end of the charging management module is connected with a battery, the input end of the rectification boost module is connected with the battery, and the output end outputs DC voltage; the step-down input module is used for reducing the voltage input by the direct-current power supply, the charging management module is used for adjusting the charging current of the battery according to the current voltage of the battery, and the rectifying and boosting module is used for boosting the voltage output by the battery. According to the utility model, the battery can be saved, the high-voltage output can be realized by