Safe power supply circuit for electronic steering column lock of automotive PEPS system

The invention provides a safe power supply circuit for an electronic steering column lock of an automobile PEPS system. The safe power supply circuit includes a power supply control input circuit, a logic control circuit, a first drive circuit and a second drive circuit. The power supply control input circuit controls the positive-electrode input end of an ESCL power supply through the logic control circuit and the first drive circuit in turn and controls the negative-electrode input end of the ESCL power supply through the logic control circuit and the second drive circuit in turn. An outputsignal of the power supply control input circuit includes an output signal of an IG1 relay, an MCU port signal and an MCU reset signal. The ESCL power supply and the ground are simultaneously controlled through the output signal of the IG1 relay, the MCU port signal and the MCU reset signal, and serious consequences caused by accidental electrifying of the ESCL in the driving process are effectively avoided. A set IG1 rel