数字式DC-DC降压开关电源.doc

PAGE PAGE II 数字式直流开关稳压电源（A题） 20 摘 要 关键字：BUCK同步整流，PID，蓝牙通讯，电源管理APP 摘要：本系统是基于BUCK同步整流拓扑结构，以STM32为控制核心，蓝牙传输与手机端APP相配合，从而形成了整个无线数字式开关电源。手机APP开启电源，STM32通过电压采样将采集到的数据送入PID算法进行处理后，实时动态调整输出的PWM的占空比，进而实现可控稳压。同时可通过手机APP端设置输出电压和上限电流，并实时显示当前电压和电流值，当电流超过设定值时，手机端会语音报警，并点亮APP中的过流指示灯，并立即关断电压。 Keywords: BUCK synchronous rectifier, PID, Bluetooth communication, power management APP Abstract: this system is based on the BUCK synchronous rectifier topology, with STM32 as the control core, the Bluetooth transmission and mobile phone end APP match, thus forming the entire wireless digital switching power supply. First, the mobile phone APP to open the power supply, STM32 through the voltage sampling will be collected into the PID algorithm for data processing, real-time dynamic adjustment of the output of the PWM duty cycle, and thus achieve a regulated voltage. At the same time through the mobile phone terminal APP to set the output voltage and current limit, and display the current voltage and current value, when the current exceeds the set value, the mobile phone terminal can voice alarm, and light in APP flow indicator, and immediately turn off voltage. 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc481582314 1系统方案 PAGEREF _Toc481582314 \h 1 HYPERLINK \l _Toc481582315 1.1 DC-DC结构的论证与选择 PAGEREF _Toc481582315 \h 1 HYPERLINK \l _Toc481582316 1.2 MOS管驱动电路的论证与选择 PAGEREF _Toc481582316 \h 1 HYPERLINK \l _Toc481582317 1.3电压采样电路的论证与选择 PAGEREF _Toc481582317 \h 1 HYPERLINK \l _Toc481582318 1.4电流采样电路的论证与选择 PAGEREF _Toc481582318 \h 1 HYPERLINK \l _Toc481582319 1.5控制系统的论证与选择 PAGEREF _Toc481582319 \h 2 HYPERLINK \l _Toc481582320 1.6无线模块的论证与选择 PAGEREF _Toc481582320 \h 2 HYPERLINK \l _Toc481582321 2.1 BUCK电路的分析 PAGEREF _Toc481582321 \h 2 HYPERLINK \l _Toc481582322 2.1.1 占空比 PAGEREF _Toc481582322 \h 2 HYPERLINK \l _Toc481582323 2.1.2 电感 PAGEREF _Toc481582323 \h 2 HYPERLINK \l _Toc481582324 2.1.3 电容 PAGEREF _Toc481582324 \h 2 HYPERLINK \l _Toc481582325 2.2 驱动电路的计算 PAGEREF