Mobile unit time delay surge protection circuit

The utility model relates to a circuit design field especially relates to a mobile unit time delay surge protection circuit, include: in proper order the power input protection circuit, the voltage stabilizing circuit that connect of electricity, go up electric delay circuit, overvoltage crowbar and switch circuit, switch circuit's output and mobile unit electricity are connected. The vehicle is gone up electric time -delayed protection earlier and is handled when light a fire starting, and the delay time does not receive the size of input power and change, has effectively avoided in ignition process the unstability of power to make equipment frequently at the state of break -make and bring adverse effect. The mobile unit normal boot back of working feeds back to control circuit by the power of level behind the mobile unit, closes the voltage stabilizing circuit who comprises resistance and stabilivolt simultaneously, has reduceed power consumption. In case appear managing the switch with MOS and closing the