Patent ID: 7643264

Claim:
A multi-channel audio circuit comprising: first and second detection circuits that are provided so as to respectively correspond to first and second load circuits wherein the first detection circuit detects an overcurrent condition of a load current of the first load circuit and provides a first detection output indicative of said overcurrent condition and the second detection circuit detects an overcurrent condition of a load current of the second load circuit and provides a second detection output indicative of said overcurrent condition; and first and second power supply circuits connected in parallel to a common voltage input and respectively corresponding to first and second audio channels, wherein the first load circuit performs an operation using power output from the first power supply circuit and the second load circuit performs an operation using power output from the second power supply circuit, and wherein an amount of power output to the first and second load circuits is independently controlled by the first and second power supply circuits, respectively; wherein each of the first and second power supply circuits comprises a control unit that receives the corresponding first or second detection output and controls a transformer of the power supply circuit so as to change an amount of power output from the power supply circuit in accordance with the detection output.