OVERHEAT DETECTOR

PURPOSE:To maintain specified detection accuracy without deteriorating detection accuracy even when dispersion on the manufacture of an overheat detector is generated at reference voltage output from a band gap circuit section. CONSTITUTION:In an overheat detector, in which reference voltage VR having no temperature dependency is formed by a band gap circuit section 11 on the basis of power-supply voltage VCC, reference voltage VR and detecting voltage VB being formed by an element for detecting an overheat and having temperature dependency are compared, and an overheat detecting signal S is output on the basis of the result of the comparison, diodes D1, D2 as circuit elements forming potential difference having temperature dependency in the band gap circuit section 11 are operated as the elements for detecting the overheat in combination.