Power supply device circuit for radiation-tolerant

A power supply device, comprising:

• a switch including a first terminal and a second terminal receiving an input of a control signal, the switch operating to be turned on or off by comparing magnitudes of a voltage between the first terminal and the second terminal with a threshold voltage;
• a protection device connected to the first terminal to change a magnitude of a source voltage of the first terminal,
• wherein the magnitude of the source voltage of the first terminal is adjusted to be increased in comparison with a case that the protection device is replaced with a short circuit;
• a switching converter for generating an output power by using an input power of an input power supplier including the switch and the protection device;
• a driving controller for generating an operation control signal of the switching converter;
• and
• a power generator for supplying power to at least one of the switching converter or the driving controller,
• wherein the protection device is constructed to be connected to a ground of the switching converter with the first terminal,
• wherein the protection device is constructed to introduce the source voltage to the first terminal based on the control signal being introduced and the switch being turned on,
• wherein the protection device includes a plurality of diodes having the threshold voltage of a predetermined magnitude, and
• wherein the protection device is constructed by connecting a first diode group and a second diode group in parallel, and wherein the first diode group includes at least one diode connected in a first direction in serial and the second diode group includes at least one diode connected in a second direction which is opposite to the first direction in serial.