| 摘要 |
A semiconductor device is provided to keep a predetermined temperature in spite of a large input voltage range by using an overheat preventing circuit. A semiconductor device includes a power semiconductor element(2) and an overheat preventing circuit(9A) between a control terminal of the power semiconductor element and a ground terminal. The overheat preventing circuit includes a driving signal input terminal(IN), a first resistor(R1) between the driving signal input terminal and the control terminal of the power semiconductor element, a second resistor(R2) connected with one end of the driving signal input terminal, a temperature detecting semiconductor element(6) for varying a voltage between terminals according the variation of temperature in a semiconductor substrate, a third resistor(R3) between the temperature detecting semiconductor element and the ground terminal, a switching semiconductor element, a clamp semiconductor element and a current stabilizing circuit for keeping constantly current of a high voltage terminal of the clamp semiconductor element. |
