Patent ID: 8924745

Claim:
A power enabling circuit for uninterrupted power supplies, comprising: a main power supply system which is electrically connected to an external power source to convert and output a conversion power and generates a first power good signal when the conversion power is output normally; a backup power supply system which is coupled in parallel with the main power supply system and includes at least one energy storage module to store a backup power which is output from the backup power supply system when the main power supply system is unable to output the conversion power; and a power enabling control circuit which is electrically connected to the main power supply system and the backup power supply system to receive the first power good signal output from the main power supply system and simulate to generate a corresponding second power good signal, and includes a normal power supply state for sending the second power good signal to a motherboard and a backup power supply state to receive the backup power output from the backup power supply system and continuously send the second power good signal to the motherboard.