| 摘要 |
PURPOSE: A temperature controller with an overheat prevention function is provided to prevent an electric shock of a user by instantly breaking the main power in the overheat of an electric mat or abnormality of the component. CONSTITUTION: A constant voltage regulator(105) converts a commercial power into a driving voltage. First and second constant current trigger circuits(110,120) supply first and second constant currents in response to first and second trigger signals of a temperature control circuit. The first and second constant current trigger circuits include a display device respectively. A forward voltage of the display device is used as a reference voltage for generating the first and second trigger signals. The first and second heating controllers detect the temperature of the first and second heating lines. |
