【作者】 骆安；

【导师】 蒋凤仙；

【作者基本信息】 复旦大学 ， 电子与通信工程， 2009， 硕士

【摘要】 随着半导体工艺技术的不断升级,电路板上的元器件运行速度更快、体积更小,同时要求更多、更低的供电电压和更大的供电电流。伴随着板上电平数的增加,系统电源管理的复杂性也迅速提高,而单位功率的价格却在不断下降。此外,用户对电源运行状态的感知、电源的故障报警及其快速修复、智能控制等等的要求越来越高,电源设计人员已不再满足于实时监控电流、电压、温度,还提出了更高的要求,诸如实时诊断电源供应情况、灵活设定每个输出电压的参数等等。这些复杂、灵活多变的需求是模拟方案所难以满足的。因此,作为电源管理发展的新思路,数字电源应运而生了,它将电源转换与电源管理架构用数字方法集成到单芯片中,实现了智能、高效的转换与监控。这样可以让电源设计变得更灵活、可靠、迅速,降低了系统级的能耗。在过去的二十多年中,基于通用或专用微处理器、数字信号处理器、以及可编程逻辑器件等技术,数字控制技术已经在诸如电机控制、三相逆变、功率因数校正等电力电子应用领域中逐渐普及开来。随着超大规模数字集成电路处理速度的飞速提高和其价格的下降,数字控制技术必将在更多大规模商用领域占据制高点。本文基于我在爱立信工作期间承担的数字非隔离开关电源项目展开,介绍直流-直流(DC-DC)数字电源的基本原理与历史,基于数字电源控制芯片,针对20A的应用,设计并制作了外围电路,对它的性能进行了实测并将结果与模拟电源作了对比分析,在2008年成功将其推向市场,受到用户好评。本文共分五章。第一章概述了直流-直流数字电源的历史与现状及其基本实现原理;第二章给出了模拟和数字控制的非隔离电源模块的硬件实现方法及外围电路,对20A数字电源从电气性能、散热到可靠性等各个方面作了测试,最后将测试结果与类似模拟产品进行了对比分析,得出了结论;第三章给出了控制数字电源的开放协议及使用方法;第四章介绍了数字电源的应用并与模拟电源的应用作了比较,指出了数字电源目前仍然存在的主要问题,并对数字电源的未来作了展望;最后,第五章给出了结论。更多还原

【Abstract】 With the continuous technology upgrading of semiconductors, components become smaller and faster,requiring lower voltage supply with more current.The number of different voltages on board is increasing, which makes power management become more complex,however,the price per unit power goes down year on year.Besides,users tend to know more about the power operating status on a real time base from fault alarm to intelligent control.Monitoring of current,voltage and temperature seems not enough anymore,real time diagnosis and flexible field settings are mandatory.These requirements cannot be fulfilled by today’ s analogue solutions.Digital power was born.By integrating both effective power conversion and intelligent power management into one chip,digital power enables power design to be more flexible,reliable and rapid,also decreases the system power dissipation,which contributes to the environment protection.Based on micro-processors、DSPs and PLDs,digital control scheme was already widely used in different power electronics area; along with the VLSI processing speed roaring while its price goes down, it will show up in more commercial applications.By analyzing the realization of digital and analogue power modules, comparing their performance and application value for the customer and listing the advantages of digital solution and its commercial value in telecom market,this thesis contributes to the implementation of digital power in telecom market.This thesis includes 5 chapters,1^st chapter presents the history and status quo of digital power and its basic principals;2^nd chapter introduces a real digital power design,and compares its performance with analogue solution in all aspects;3^rd chapter gives a protocol of digital control communication and its usage;4^th chapter compares the application vahe of digital power against analogue ones,pointing out the main problems remained and gives an outlook of digital power;the last chapter presents the conclusion.更多还原