Patent ID: 8369114

Claim:
A power supply comprising: an alternating current (AC) to direct current (DC) converter for converting an AC power into a DC power while the AC power is supplied to the power supply; a main power converter coupled to the AC to DC converter for converting the DC power into a main power when being enabled and stopping outputting the main power when being disabled; a standby power converter coupled to the AC to DC converter for converting the DC power into a standby power while the AC power is supplied to the power supply and stopping outputting the standby power while the AC power is removed; a power switch circuit coupled to the main power converter for receiving a power switch signal and turning on or off the main power converter according to the power switch signal; an error detecting circuit coupled to the main power converter for outputting an error signal when detecting an overvoltage or overcurrent occurred in the main power; and a latch trigger circuit coupled to the standby power converter, the error detecting circuit and the power switch circuit for controlling the power switch circuit to turn off the main power converter and forcing the standby power to stay at low level when receiving the error signal, and being inactivated when not receiving the error signal.