A power supply system, a control integrated circuit for a multiphase switching converter and a control method

Abstract

A power supply system, a control integrated circuit (IC) for a multiphase switching converter, and a control method are disclosed. The power supply system comprises a plurality of first switching circuits, a plurality of second switching circuits, a master control IC, and a slave control IC. The plurality of first switching circuits and the plurality of second switching circuits are connected in parallel to provide an output voltage. The master control IC and the slave control ICs respectively control the plurality of first switching circuits and the plurality of second switching circuits based on a voltage sense signal representing the output voltage. A first acknowledgment control pin of the master control IC and second acknowledgment control pins of the slave control ICs are coupled together to transmit acknowledgment control signals. The master control IC and the slave control ICs receive commands from a system controller, respectively determine whether to execute the commands, and set a state of each acknowledgment control signal based on a determination result. The master control IC and the slave control ICs execute the commands in response to the states of the acknowledgment control signals. The master control IC responds to the commands. This application optimizes communication between the system controller and the plurality of control ICs, enhancing circuit reliability.

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