Patent ID: 8305057

Claim:
A power supply, comprising: a power supply unit, adapted for providing powers of different voltage levels, the powers comprising a standby power and a system power, wherein when the power supply unit is disabled, the power supply unit keeps providing the standby power but stops providing the system power; a conversion unit, adapted for converting the system power outputted from the power supply unit into a core power so as to provide the core power to a load; and an over voltage protection (OVP) apparatus, coupled to the power supply unit for receiving the standby power and coupled to the conversion unit for monitoring a voltage level of the core power, wherein, when the voltage level of the core power is less than a reference voltage, the power supply providing the system power to the power conversion unit, wherein when the voltage level of the core power is higher than the reference voltage, the OVP apparatus directly output a disable signal to the power supply unit to disable the power supply unit and stop the system power providing to the conversion unit.