Patent Number: 6,297,976

Title: Thin, cascade-connected direct current source circuit

Abstract: The present invention relates to a power supply having a plurality of converters which is capable of easily setting a load share of each converter and simplifying the construction of the circuit, thereby reducing the cost. A DC source circuit having such a power supply includes a plurality of converters (each having a transformer, switches for interrupting a DC input and supplying the same to a first side of the transformer and a rectifier circuit for rectifying a voltage outputted from a second side of the transformer), an output circuit which cascade-connects each output voltage of the plurality of converters and thereby obtains a composite output voltage V.sub.out, and a common control circuit for feedback-controlling the plurality of switches as a function of the composite output voltage, e.g., according to the difference between the composite output voltage and the reference voltage. A load of each converter is shared according to each set output voltage. In addition, the cost of the power supply can be reduced by commonly using the control circuit.

Inventors: Isono; Katsuo (Tokyo, JP)

Assignee: LG Electronics, Inc.

International Classification: H02M 3/24 (20060101); H02M 3/335 (20060101); H02M 003/335 ()

Expiration Date: 10/02/2018