Patent ID: 8760063

Claim:
A multi-output self-balancing power circuit, comprising: a) a transformer having a primary winding and n secondary windings, wherein a first input terminal of said primary winding is coupled to an input voltage, a second input terminal of said primary winding is coupled to ground via a switch, and an output current of said power circuit is configured to be controlled by states of said switch; b) wherein said n secondary windings are coupled in series, wherein a first output terminal of each of said n secondary windings and said second input terminal of said primary winding are undotted terminals, and a second output terminal of each of said n secondary windings and said first terminal of said primary winding are dotted terminals, wherein n is a positive integer of at least two; c) n output circuits corresponding to said n secondary windings, wherein each of said n output circuits comprises a rectifier diode and a filter capacitor that are sequentially coupled in series, and a load configured to be coupled in parallel with said filter capacitor, wherein said n output circuits are configured to be coupled in series between a first output terminal of a first secondary winding and a second output terminal of an n th secondary winding, said second output terminal of said n th secondary winding being coupled to ground; and d) (n−1) current balancing capacitors, wherein each current balancing capacitor is separately coupled between a common junction of two adjacent of said n secondary windings and a common junction of two adjacent of said n output circuits.