Patent ID: 7936090

Claim:
A driving circuit for driving a plurality of current-driven devices, the driving circuit comprising: a voltage converter, for converting an input voltage into an output voltage for driving the current-driven devices; and a controller, coupled to the voltage converter and the current-driven devices, the controller comprising: a voltage-converter controller, for controlling the voltage converter; a channel-enablement detector, coupled to the voltage-converter controller; a plurality of output channel terminals, coupled to the channel-enablement detector, wherein the output channel terminals are further coupled to a reference voltage or the current-driven devices; and a plurality of detecting current sources, coupled to the output channel terminals; wherein at an initiation of the driving circuit, the channel-enablement detector detects whether a plurality of voltages at the output channel terminals are changed by the detecting current sources and accordingly determines whether the output channel terminals are coupled to the current-driven devices.