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A dc‑dc converter control system

A control system, DC-DC technology, used in control/regulation systems, output power conversion devices, instruments, etc., can solve problems such as life loss of electronic equipment, output fluctuations of switching power supplies, etc., to achieve short recovery time, small overload Impulse voltage, effect of good dynamic performance

Inactive Publication Date: 2017-04-26
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the input voltage and load of the switching power supply are constantly changing, the output of the switching power supply will fluctuate greatly. If the fluctuation causes the output voltage to exceed the safe working range of the electronic equipment, the life of the electronic equipment will be greatly reduced.

Method used

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  • A dc‑dc converter control system
  • A dc‑dc converter control system
  • A dc‑dc converter control system

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Embodiment Construction

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0045] see Figure 1-5 , a DC-DC converter control system of the present invention includes an analog-to-digital converter ADC for collecting the output voltage of the DC-DC converter, a control logic for processing a digital error signal collected by the analog-to-digital converter ADC, and generating DPWM unit and drive unit for switching control signals;

[0046]The input terminal of the analog-to-digital converter ADC is connected to the output sampling point of the DC-DC converter, the output terminal of the analog-to-digital converter ADC is connected to the input terminal of the control logic, the output terminal of the control logic is connected to the input terminal of the DPWM unit, and the DPWM The output terminal of the unit is connected with the driving unit.

[0047] The DC-DC converter of the present invention adopts a step-down conversion ci...

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Abstract

The invention discloses a DC-DC converter control system which comprises an analog-digital converter (ADC), control logics, a DPWM (digital pulse-width modulation) unit and a driving unit. The analog-digital converter (ADC) is connected with an output sampling point of a DC-DC converter and the control logics respectively, the control logics are connected with the DPWM unit, and an output end of the DPWM unit is connected with the driving unit. The DC-DC converter control system has the advantages that output voltages of the DC-DC converter are sampled and monitored to obtain error signals, the error signals are subjected to control logic operation to obtain duty cycle signals, switch control signals can be obtained by the aid of the DPWM unit, the driving capacity of the switch control signals can be improved by the driving unit, accordingly, on and off of power tubes of the DC-DC converter can be controlled, specified values can be quickly and stably outputted by the DC-DC converter when input voltages and load change, the DC-DC converter control system is low in overshoot voltage and short in required recovery time, and excellent dynamic performance of the system can be guaranteed.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a DC-DC converter control system. Background technique [0002] Today, with the rapid development of science and technology, consumer electronics products are more and more closely related to people's daily life and work. However, this has led to higher and more comprehensive requirements for power supply performance in electronic devices and systems. Due to the traditional linear power supply's fatal shortcomings of low conversion efficiency and high heat generation, switching power supplies with high efficiency are more and more widely used. [0003] The core structure of a switching power supply is a DC-DC converter, and the control method of the DC-DC converter directly affects the stability of electronic devices and system operation. Digital control has gradually become the new darling of scholars and businessmen due to its advantages of high portability, flexible control mode, less of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/156
CPCH02M3/157
Inventor 王闯李尊朝郑晓玉刘尧王元发康琅
Owner XI AN JIAOTONG UNIV
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