FIELD: electrical engineering.
SUBSTANCE: invention relates namely to control circuits with ultra-low power consumption and is intended to create low-power AC-DC power supplies without an auxiliary winding on a power transformer. The technical result, which the claimed technical solution is aimed at achieving, is achieved by introducing a step-up voltage converter into the circuit, which converts the operating power supply of the circuit into an increased voltage. The output transistor driver's power is connected to the circuit's operating power and boost voltage through a multiplexer controlled by a comparator. The comparator controls the operating power of the circuit and controls the internal transistor, which is connected between the source of the power transistor and the common wire. The anode of the diode is connected to the common point of the transistors, the cathode of which is connected to the operating power bus of the circuit.
EFFECT: reducing losses in the control circuit of the power source, increasing the efficiency of low-power sources.
2 cl, 2 dwg
