DC/DC circuit soft start control circuit and vehicle-mounted equipment

The utility model relates to the field of vehicle-mounted power supply circuits, in particular to a DC/DC soft start control circuit and vehicle-mounted equipment. The DC/DC soft start control circuitcomprises a high-voltage power supply, a switching circuit, a DC/DC circuit and an active load capable of providing a power supply, which are sequentially connected in series, the DC/DC circuit comprises a bus capacitor and a voltage conversion circuit which are sequentially connected in series. Wherein the bus capacitor is connected with the switching circuit, the voltage conversion circuit is further connected with the active load, the DC/DC soft start control circuit further comprises a sampling circuit, a driving circuit and a controller, and the controller is respectively connected withthe switching circuit, the voltage conversion circuit, the driving circuit, the sampling circuit and the active load. The power supply of the active load is used for reversely charging the bus capacitor through the voltage con