Mixed control circuit of DVS system switch DC-DC converter and control method of mixed control circuit of DVS system switch DC-DC converter

Abstract

The invention discloses a mixed control circuit of a DVS system switch DC-DC converter and a control method of the mixed control circuit of the DVS system switch DC-DC converter. Orderly switching between two control modes is achieved through a mixed digital algorithm based on traditional linear digital PID and nonlinear digital sliding-mode control. In the steady state, a slow loop of a digital PID compensator is selected through the mixed control algorithm to work, and small ripple waves of the output voltage and fast responses to small jumping are achieved. When feedback signals of a DVS algorithm module jump, the loop is compensated by the PID through the mixed control algorithm to stop working, a digital sliding-mode control fast loop is selected, and the DC-DC converter fast gets into the steady state. By means of the mixed control circuit and the control method, the mixed digital control obviously has the high dynamic response speed, and the large the voltage jump amplitude is, the remarkable the advantages are compared with traditional digital PID control. In this way, the mixed digital control DC-DC converter is suitable for DVS systems.

Description

Technical field: [0001] The invention belongs to the field of switching power converters, and in particular relates to a control circuit and a control method for improving the dynamic performance of a switching DC-DC converter of a voltage conversion module in a dynamic voltage adjustment technology (Dynamic Voltage Scaling, DVS). Background technique: [0002] With the continuous development of portable electronic products towards miniaturization, full integration, and multi-function, consumers have higher and higher requirements for the functions of portable electronic products, but the development of battery capacity has not increased accordingly. How to improve the performance of portable electronic products The standby time and the most efficient way to use the limited energy of the battery have become a research hotspot. Dynamic Voltage Scaling (DVS) is a widely used method to reduce the overall power consumption of the system. Since the processor is generally designe...

AI Technical Summary

Problems solved by technology

However, this control algorithm requires complex digital circuits to achieve adaptive adjustment of PID coefficients, which will greatly increase the design difficulty and chip area of ​​the control circuit.

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