Control circuit and control method for dc / dc converter

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By using a simple circuit structure and compensation circuit to generate voltage and current compensation signals in the DC/DC converter, the problem of response delay in the load is solved, and rapid response and stability improvement is achieved.

CN119727383APending Publication Date: 2025-03-28BEIJING BIG TOP MOMENT TECH CO LTD

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Patent Information

Application Number: CN202311279724.X
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2023-09-28
Publication Date: 2025-03-28

Application Information

Patent Timeline

28 Sep 2023

Application

CN202311279724.X

28 Mar 2025

Publication

CN119727383A

IPC: H02M3/158; H02M1/08

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Application Domain

Dc-dc conversion Electric variable regulation

Technology Topics

Converters Control signal

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AI Technical Summary

Technical Problem

Traditional DC/DC converters respond to delays when load changes suddenly, unable to quickly and accurately control load voltage, and the complex oscillator structure increases cost and power consumption.

Method used

Using a simpler circuit structure, voltage and current compensation signals are generated through compensation circuits and comparison circuits, control signals are generated based on these signals to control the on- or off of the switching circuit, and duty cycle of the PWM signal is adjusted to respond quickly to load changes.

Benefits of technology

It realizes rapid response to load sudden changes, improves the stability and dynamic performance of DC/DC converters, and reduces system complexity and power consumption.

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Abstract

The invention discloses a control circuit and a control method for a DC / DC converter. The control circuit comprises a compensation circuit which can obtain a voltage compensation signal associated with an output voltage and a current compensation signal associated with an inductive current, and can control the voltage compensation signal to increase when the output voltage is less than a target voltage and decrease when the output voltage is greater than the target voltage, the control unit can control the current compensation signal to increase and decrease along with the increase of a value indicating the inductive current, and can generate a compensation reference signal based on the difference between the voltage compensation signal and the current compensation signal; and the comparison circuit can generate a control signal based on the compensation reference signal and is used for controlling on or off of a switching circuit connected with an inductor so as to increase or decrease the inductor current. Therefore, the direct current / direct current converter can respond to the load abrupt change relatively quickly, and the stability of the direct current / direct current converter is improved.

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