CONTROL CIRCUIT AND INTERLOCKED POWER SUPPLY

Abstract

A control circuit according to the present invention comprises: a load state detection unit 120; an ON trigger generation unit 130; a gate control circuit 150; a drive unit 160; and an interleaving signal generation unit 170. The load state detection unit 120 outputs load state information, determined based on the error amplifier output voltage, to an interleaving signal generation unit 170. The ON trigger generation unit 130 generates an ON trigger and outputs the ON trigger to the gate control circuit 150. Based on the load state information and control signal output information, the interleaving signal generation unit 170 outputs an interleaving signal to a slave converter 30, which contains information about whether a slave switch control circuit 200a, 200b should be stopped or not.The control circuit of the present invention allows a load to be monitored without increasing the number of connections and independently of the cycle of an AC power source. Accordingly, new parts and wiring are not required, and therefore it is possible to easily switch whether the slave converter should be stopped in the light load state or not, without increasing the number of connections.

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