Charging circuit

The utility model provides a charging circuit has solved the complicated and high problem of price of current charging circuit structure. The technical scheme of its solution is, including resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, comparator U1, comparator U2, diode D1, diode D2, triode Q1, emitting diode LED1, emitting diode LED2, emitting diode LED3, lithium cell VT and external power supply VCC. The utility model discloses simple structure, when the voltage of lithium cell is less than reference voltage vref2, the emitting diode LED3 light that turns red, when the lithium cell when charging, the emitting diode LED1 light that turn to be yellow, the expression lithium cell charges, when the lithium cell was full of the electricity, emitting diode LED2 greening light showed that the lithium cell is full of, electrical component is few, the price is hanged down, the practicality is strong. 本实用新型提供种充电电路，解决了现有充电电路结构复杂和价