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The Design of Switching Power Supply Based on the Digital Control

Author: ShiFengGuang
Tutor: CuiYuLong
School: Beijing University of Chemical Technology
Course: Control Science and Engineering
Keywords: Switching Power Supply Digitizing MOSFET driver protection Two filter
CLC: TN86
Type: Master's thesis
Year: 2010
Downloads: 444
Quote: 3
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Abstract


This article from the actual needs, based on laboratory research and power requirements , through the power supply on the market today compare the performance analysis to identify existing power shortage , and thus leads to research the significance of the power of digital . In this paper, the main power conversion circuit topology research, analysis BUCK circuit specific works. The design requirements for the project , describes the current mainstream multi-output circuit topology and choose topics used in the main circuit topology. For the main power conversion tube selection and driving and protection technology , this paper focus on the research , given the drive circuit design basis , and the principle of the protection of the power MOSFET to conduct a detailed analysis and discussion mainstream method of protection , and gives RCD protection circuit parameters of the two methods , and finally specific experimental validation , experimental results show that the method is feasible. Precision output is designed to focus on issues , this article describes several common low ripple output programs, and theoretical analysis and comparison of two filter circuits in small signal mode, the output ripple effect , the final choice BUCK circuit two filtering way to reduce the output ripple voltage peak to peak . Topics large number of experiments , and gives experimental waveforms , experiments show that the scheme can meet the design requirements of the subject . Digital power is an important part of the research . The traditional analog control method can not meet the needs of modern power supply design concept , its large volume, the drawbacks of using multiple devices with energy conservation requirements are also deviates . This topic uses TI's TMS320F2812DSP as the core, constitute the entire power control system. Machine debugging and testing show that the design of the power system topics can satisfy the needs of the laboratory supply .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Power supply
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