Short -circuit protection circuit and power supply device

The utility model discloses a short -circuit protection circuit and power supply device, short -circuit protection circuit include switch element, protected location and filtering unit. Switch element connect protection unit and filtering unit, filtering unit connection rear end equipment. The switch element carries out the break -make according to control signal and switches to control power supply voltage's output state. The filtering unit is exported the power supply voltage post -filter and is supplied power for rear end equipment. The disconnection of control switch unit stopped to export power supply voltage when the protected location detected rear end equipment short circuit, and the control switch unit resumes to switch on after the short circuit disappears to power supply voltage's output resumes. The problem of when protection switch element of hiccuing last the break -make and heat up, cause built -in MOS pipe and drop or even produce the naked light is solved, reduced the potential safety hazard