Startup and shutdown circuit and control system

The embodiment of the utility model relates to the technical field of electronic circuit control. The utility model discloses a startup and shutdown circuit and a control system. The circuit comprisesa switching circuit, a switching power supply circuit, a detection circuit, a self-locking circuit and a control unit, the control unit judges whether to shut down or not through the detection circuit, if yes, a control signal is output to the self-locking circuit, and the switching power supply circuit is controlled to stop supplying power through the self-locking circuit. According to the embodiment of the utility model, the control unit is in a closed state, and the power supply circuit is also in a closed state, so that the operation loss of the whole system is greatly reduced, the energyconsumption is saved, the structure is simple, and the circuit is very convenient to realize. 本实用新型实施例涉及电子电路控制技术领域，公开了一种开关机电路及控制系统，所述电路包括开关电路、开关电源电路、检测电路、自锁电路和控制单元，所述控制单元通过检测电路判断是否关机，如果需要关机时，则输出控制信号给自锁电路，通过自锁电路控制所述开关电源电路停止供电。