Patent ID: 7639466

Claim:
A computer apparatus with over-voltage protection function, which comprises: a central processing unit (CPU); a power supply, which is used to supply the power required by the CPU, and accept the trigger by a first trigger signal to turn off the power supply; an over-voltage protection device, which is electrically connected between the CPU and the power supply to protect the CPU from damage under the condition of over-voltage failure, and includes: a first voltage comparison unit, which is used to compare the output voltage from the power supply with a default lower voltage limit and a default upper voltage, and output a first potential signal; a reference voltage unit, which is used to output a reference voltage based on the first potential signal; a second voltage comparison unit, which is used to compare the core voltage of the CPU with the reference voltage, and output a second potential signal when the core voltage of the CPU is larger than the reference voltage; a trigger unit, which is used to accept the trigger by the second potential signal, and output the first trigger signal and a second trigger signal; a circuit switch unit, which is used to accept the trigger by the second trigger signal, and turn off the electrical connection between the CPU and the power supply.