Patent ID: 7274251

Claim:
A current sharing apparatus, comprising: an input terminal; an output terminal; a current-sharing control terminal, providing a current-sharing control interface; a pass transistor, having a first terminal, a second terminal, and a third terminal, said first terminal being electrically coupled to said input terminal for receiving an input voltage, said second terminal being electrically coupled to said output terminal for providing an output voltage and an output current to said output terminal; a constant voltage generating unit, generating a reference voltage; a feedback control circuit, being electrically coupled to said output terminal and said pass transistor for sensing said output current to provide a current-sense signal, said feedback control circuit regulating and providing a control signal to said third terminal of said pass transistor in response to a reference signal in order to control an output of said current sharing apparatus; and a current-sharing control unit, being electrically coupled to said current-sharing control terminal and said feedback control circuit for generating a bus signal in response to said current-sense signal and said reference voltage, said current-sharing control unit generating said reference signal in response to said reference voltage, said bus signal, said current-sense signal.