USB interface is to vehicle mounted power short -circuit protection circuit

The utility model relates to a USB interface is to vehicle mounted power short -circuit protection circuit sets up between USB power supply IC's output and USB interface type end, including detectioncircuitry and feedback actuating circuit, detection circuitry's input is connected USB interface type end with between the action feedback circuit, action feedback circuit still can the circuit including the switch circuit and the messenger that connect, switch circuit's messenger can the input through make can the circuit with detection circuitry's output is connected. The utility model disclosesa beneficial effect that USB interface is to vehicle mounted power short -circuit protection circuit played includes: 1 the utility model discloses the problem that harm power supply IC appears in the on -vehicle battery of on -vehicle USB power supply end short circuit has effectively been solved. 2 the utility model discloses it can automatic recovery normal condition to have guaranteed after the short circuit removes,