Patent ID: 7675193

Claim:
A selective independent overload and group overload protection circuit of a power supply, comprising: a power conversion circuit, for converting an external power supply into a plurality of DC voltage outputs, and the power conversion circuit including a system output power supply and a system protection circuit; a switching circuit, coupled to the system output power supply; a plurality of independent circuits, selectively switched and coupled to the system output power supply by the switching circuit, and the independent circuit including a plurality of independent output power supplies and an independent overload protection circuit with a one-to-one correspondence with each independent output power supply, and the independent overload protection circuit having a critical value of power output; a group circuit, selectively switched and coupled to the system output power supply by the switching circuit, and the group circuit including a group output power supply and a group overload protection circuit, and the group overload protection circuit has a critical value of power output not greater than the sum of the critical values of power output of the plurality of independent output power supplies; and a plurality of loads, coupled to an independent output power supply in the plurality of independent circuits with a one-to-one correspondence with the group output power supply of the group circuit; thereby, a user can turn on an independent circuit or a group circuit by the switching circuit for selecting an appropriate power output according to the requirement of a load.