Constant current intelligence power supply circuit

The utility model discloses a constant current intelligence power supply circuit, including resistance R1, chip IC1, chip IC2, MOS pipe Q1 and MOS pipe Q2, resistance R1's one end connecting resistance R4, resistance R7, power VCC, MOS manage Q2's source electrode, chip IC2's pin 4 and chip IC2's pin 8, and electric capacity C2, electric capacity C3, electric capacity C4, diode D1's positive pole, the pin 1 that MOS managed Q1's source electrode, load A and chip IC2 are connected to resistance R1's other end connecting resistance R2 and chip IC1's pin 3, resistance R2's the other end. The utility model discloses constant current intelligence power supply circuit simple structure, components and parts are few, utilize 555 timer chip's operating characteristic and comparator chip to combine together, through the alternative break -make of control MOS pipe, and then have realized the mesh of constant output electric current to output current is adjustable, consequently has the stable performance, controls advant