SYSTEM FOR PREVENTING OVERHEAT OF CPU

摘要

PURPOSE: A system for preventing overheat of a CPU is provided to maximize an operation efficiency of the CPU and efficiently prevent a damage of the CPU by removing an overheat state of circuits, which is easy to be overheated by an operation frequency of the CPU, through one overheat preventing circuit. CONSTITUTION: A CPU temperature detector(5) detects a temperature of the CPU(1). A reference temperature detector(7) detects the temperature of a part on a board easy to be overheated. A comparator(10) compares the temperature values detected from each temperature detector and outputs a variance of the temperature value on a higher side as a linear signal. A CPU power supply(16) controls the operation frequency of the CPU in multilevel based on the linear signal depending on a temperature variance output from the comparator.