Patent ID: 8563903

Claim:
A circuit for controlling heat generation of a transistor, the circuit comprising: a metal-insulator transition (MIT) device in which abrupt MIT occurs at a predetermined critical temperature; and a power transistor connected to a driving device and controlling power-supply to the driving device, wherein the MIT device is attached to a heating surface or heating portion of the transistor and is connected to a base terminal or gate terminal of the transistor or a surrounding circuit from a circuit point of view, wherein when a temperature of the transistor increases to a temperature equal to or greater than the predetermined critical temperature, the MIT device reduces or shuts off a current of the transistor so as to prevent heat generation, wherein the MIT device comprises an MIT thin film where abrupt MIT occurs at the critical temperature, and at least two electrode thin films in contact with the MIT thin film, wherein the MIT device is a stack type in which the at least two electrode thin films are disposed between the MIT thin film, or a horizontal type in which the at least two electrode thin films disposed at both sides of the MIT thin film, and wherein the MIT device is packaged in a dual in-line package (DIP) type in which the MIT thin film and the at least two electrode thin films are sealed by a sealing member, or is packaged in a CAN type in which a predetermined portion of the MIT thin film is exposed.