Analog-digital hybrid multiphase interleaving parallel power converter

Abstract

The invention provides an analog-digital hybrid multiphase interleaving parallel power converter, wherein a peak current control chip and a conventional boost converter form a voltage source module, and current ripples of input and output are reduced remarkably through a multiphase interleaving parallel structure. Each module is uniformly controlled by a digital control chip DSP, analog and digital parts are connected through a differential circuit and common-mode noise is eliminated. Analog-digital hybrid control is used in the analog-digital hybrid multiphase interleaving parallel power converter, digitalization enables the converter to have the capability of realizing complex control algorithms, moreover, real-time communication can be realized, the number of the modules can be changeddynamically, and multiple protection is realized; and the analog peak current has high detection prevision, fast response and strong capacity of resisting disturbance. Additionally, modular power supply design is used, and structure of the modular power supply design is highly integrated. Relatively, under the condition of same working conditions, the analog-digital hybrid multiphase interleavingparallel power converter is obviously superior to the other pure analog systems or pure digital systems in the aspect of working performance.

Description

technical field [0001] The invention belongs to the technical field of power converters, in particular to an analog-digital hybrid multi-phase interleaved parallel power converter. Background technique [0002] The traditional high dynamic response switching converter mainly adopts the multi-channel interleaved parallel structure of the double-loop control mode of the current loop and the voltage loop to improve the dynamic response speed, maintain the voltage control accuracy and reduce the voltage and current ripple. [0003] Voltage-mode control is the most commonly used control method in voltage-mode output power converters. It can eliminate the static difference of output voltage and maintain high precision, but it cannot respond immediately to load disturbances, and its dynamic response speed is not ideal. The current control can be divided into average current control, peak current control and valley current control, peak current control is the most widely used. Peak...

AI Technical Summary

Problems solved by technology

[0005] The traditional multi-phase interleaved parallel power converter based on the analog IC controller architecture has many power devices and poor stability. It cannot realize complex control algorithms, complex online adjustment of phase numbers, and complex protection circuits.

However, the multi-phase interleaved parallel power converter with pure digital structure is difficult to complete the peak current closed loop with high precision and fast response. If the average current detection is used, the circuit cost is high, and the anti-interference ability of multi-channel current detection remote test is poor.

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