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 Vout, 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.

Dependencies are inferred from the claim text.