Multiphase power supply switching controller with current balance function

Abstract

The invention provides a multiphase power supply switching controller with a current balance function, and is used for controlling multiple switching circuits to jointly provide an output voltage. The multiphase power supply switching controller comprises a feedback circuit, a constant conduction time circuit and a multiphase logic controller. The feedback circuit detects the output voltage to generate a feedback control signal. The constant conduction time circuit generates a conduction time signal according to the feedback control signal, and pulse width of the conduction time signal is determined according to a single timing circuit. The multiphase logic controller selects a corresponding switching circuit in multiple switching circuits according to the sequence of the feedback control signal to generate a phase number signal, and controls the corresponding switching circuit according to the conduction time signal. The constant time circuit judges the correction amount of current of the corresponding switching circuit according to current of the multiple switching circuits and in correspondence to the phase number signal, and corrects the pulse width of the corresponding conduction time signal accordingly.

Description

technical field [0001] The invention relates to a multi-phase power conversion controller, in particular to a multi-phase power conversion controller with current balance Background technique [0002] With the evolution of manufacturing process technology, integrated circuits are becoming smaller and smaller. The miniaturization of integrated circuits will be accompanied by a drop in driving voltage. However, the power consumption of the integrated circuits in some fields does not decrease proportionally with the decrease of the driving voltage, so that the operating current of the integrated circuits increases inversely. [0003] The driving voltage source of the integrated circuit is mainly a switching power supply circuit. The switching operation of the switching power supply circuit will cause voltage ripple (Ripple) at the output terminal. These voltage ripples will be obvious in the operating environment of low driving voltage, and even cause logic errors of integra...

AI Technical Summary

Problems solved by technology

[0007] The multi-phase power conversion circuit in the prior art has the problems of poor transient response, complex circuit and high cost, and poor accuracy of current balance

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