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STM32F334数字电源设计
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2018-08-17
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STM32F334数字电源设计,对上次上传的PCB绘图有功能模块说明解析
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摘要
相对于传统的线性稳压电源,开关电源具有效率高、输出功率大、体积小、
重量轻、成本低等优点。随着电子元器件工艺的进步和新型元件的出现,开关电
源的优势在不断的放大。DC-DC(直流转直流)是开关电源中一个重要的研究方
向,本文以 BUCK 电路为基础,以目前 ARM 新型高速单片机 STM32F334 为控制
核心,包括信号采集电路、BUCK 电路、控制电路、供电电路四部分,设计了一
款降压型 DC-DC 可调压开关电源。详细的阐述了开关电源的原理和各种转换器
的拓扑结果,其中着重解释了 DC-DC 降压的原理,然后根据性能要求设计电路
的整体框图,对电路的各个部分进行设计和分析。
本设计可以广泛用于智能手机,平板,智能机器人等集成度较高的电子设备。
关键词:开关电源;DC-DC;STM32F334;BUCK 电路
ABSTRACT
Compared with the traditional linear stabilized voltage supply, switching power
supply has the advantages of high efficiency, large output power, small volume, light
weight and low cost. With the progress of electronic components and the appearance of
new components, the advantages of switching power supply are constantly amplified.
DC - DC (DC) straight flow is an important research direction in switching power
supply, this paper on the basis of BUCK circuit, current ARM new high-speed
microcontroller STM32F334 as the control core, including signal collection circuit,
BUCK circuit, control circuit, power supply circuit four parts, designed a step-down DC
- DC switching power supply voltage regulator. Detailed expounds the principle of
switch power supply and all kinds of converter topology results, which mainly explains
the principle of DC - DC voltage, and then according to the performance requirements
overall block diagram of the circuit design, each part of circuit design and analysis.
This design can be widely used in smart phone, tablet, intelligent robot and other
integrated electronic equipment.
Key words: switching power supply; DC - DC; STM32F334; BUCK circuit
目录
第 1 章 绪论....................................................................................................................................... 6
1.1 研究背景.............................................................................................................................. 6
1.2 研究目的及主要任务........................................................................................................... 8
1.3 研究意义.............................................................................................................................. 9
1.4 研究现状.............................................................................................................................. 9
1.4.1 国内研究现状........................................................................................................... 9
1.4.2 国外研究现状......................................................................................................... 11
第 2 章 系统方案设计..................................................................................................................... 13
2.1 开关电源的工作原理........................................................................................................ 13
2.2 降压型 DC-DC 开关电源工作原理..................................................................................... 14
2.3 总体设计............................................................................................................................ 14
第 3 章 BUCK 同步减压拓扑及控制方式........................................................................................ 17
3.1 BUCK 同步降压.................................................................................................................. 17
3.2 控制模式............................................................................................................................ 19
3.2.1 电压模式控制......................................................................................................... 19
3.2.2 电流模式控制......................................................................................................... 20
第 4 章 硬件设计............................................................................................................................. 23
4.1 BUCK 电路.......................................................................................................................... 23
4.2 驱动电路............................................................................................................................ 24
4.3 信号采集电路.................................................................................................................... 26
4.3.1 输入电压检测......................................................................................................... 26
4.3.2 输出电压检测......................................................................................................... 27
4.3.3 远端电压检测......................................................................................................... 29
4.3.4 输出电流检测......................................................................................................... 29
4.4 MCU 控制电路................................................................................................................... 31
4.5 供电电路............................................................................................................................ 34
第 5 章 软件设计............................................................................................................................. 40
5.1 比例控制............................................................................................................................ 40
5.2 微分控制理解.................................................................................................................... 41
5.3 积分控制理解.................................................................................................................... 42
5.4 PID 算法离散化.................................................................................................................. 43
第 6 章 总结..................................................................................................................................... 49
6.1 优势.................................................................................................................................... 49
6.2 不足之处............................................................................................................................ 50
参考文献......................................................................................................................................... 51
致谢................................................................................................................................................. 53
附录一:源程序.............................................................................................................................. 55
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