基于USB接口电源管理芯片的设计与实现-电路与系统专业论文.docxVIP

AbstractWith Abstract With the development of electronic information technology and portable electronics spreading widely，The USB interface technology is widely used because of its excellent power management features．As the power management chip，in order to cope with the impact of high current to provide more reliable and accurate current protection and reduce the power consumption of the chip is the research significance． The project of this passage is exactly the design and research of power management IC based on USB 3．0．First of all，this paper introduces the USB interface are reviewed， and introduced the characteristics and principle of power management chip．Then，This passage brings up the system frame designing of the whole USB Power Switch according to design function request and the workflow of IC，and it make detailed theoretical analysis and specific circuit design on the submodule circuit under the system frame，especially for the design optimizing and innovation of current foldback circuit．In the last，this passage makes integral simulation on the IC by making all the submodule circuits together and building the appropriate circuit．it give the matching simulation result to the special parameters required in the design，and makes sure that the working performance of IC satisfy the design request． It put forward some experiences and some valuable thinking about this USB power management chip in the processing of analysis and design of the power management chip，how to protect electronic equipment in the process of fast rushed and bow to reduce the wastage of the transmission voltage is worth research． Keyword：USB；Power management；Current limited；Light·load energy saving； Integrated circuit II 万方数据 目 目 录 摘要 I Abstract ． ． ． ．．． ． ．II 第1章引言 1 1．1 USB接口的概述 1 1．1．1 USB接口的发展背景 1 1．1．2 USB接口的分类 ．1 1．2 USB接口的电源管理 3 1．2．1 USB电源管理的特点 3 1．2．2电源管理芯片的研究现状以及发展趋势 ．．4 1．3选题的意义以及内容安排 ．．4 1．3．1选题的意义 ．4 1．3．2本文的章节安排 5 第2章USB电源管理的原理与系统设计 ．6 2．1 USB电源开关的工作原理 一6 2．2 USB电源管理芯片设计要求