中文摘要 便携式电子设备已经成为我国和全球电子信息市场最有发展前景的新亮点

中文摘要便携式电子设备已经成为我国和全球电子信息市场最有发展前景的新亮点。目前，我国移动电话的数量已经超过2 亿只，并且正在以极快的速度迅猛发展，不久将超过固定电话的数量。此外，笔记本电脑、便携式MP3 播放机、便携式DVD 播放机、互联网接入设备、便携式GPS 终端、数码相机、个人数字助理（PDA）等也正在快速发展。便携式电子设备对电源提出了极高的要求。比如，为了延长蓄电池的供电时间，除了提高电源的效率外，还必须降低待机功耗；为了缩小便携式电子设备的体积，去了提高开关电源的频率，增加电源产品的功率密度外，还必须缩小电源管理器件的体积；为了改善便携式电子设备的性能，除了提高电源的稳压精度外，还必须降低电源的噪声。为了满足便携式电子产品的要求，电源技术也得到了迅速发展。近年来，镍氢电池和锂离子电池的容量密度（单位体积的容量）都有显著的提高。为了适应便携式电子设备超小型化和超薄化的要求，国内已推出方形、扣式锂离子电池和锂聚合物电池，而且随着需求量的不断增加，镍氢和锂离子电池的价格大幅度下降，锂离子电池的保护功能、容量监控也逐渐完善。便携式电子设备采用低压差线性稳压器、高效率DC/DC 变换器和具有待机降耗功能的离线式开关电源，可以大大提高效率。移动电源的地位在便携式电子产品研究中历来十分重要，它是电子设备的生命源。本文设计了一种可应用于便携式电子设备上的电源管理系统，首先对便携电子设备电源管理技术的产生、发展及应用作简单的介绍；然后介绍便携电子设备电源管理的原理、系统的设计框图、电路原理图设计、PCB 制版图设计；再次，通过对实物的参照、调试和对比，进行实物与理论的分析；最后，对此次设计总结，对系统可能出现的一些问题提出几点改进设想。关键词：便携式电子设备；电源管理；移动设备；锂离子电池ABSTRACT Abstract The Portable Electronics has already become our country and the global electron informationmarket to have lately a little bit bright the development foreground most. Currently the quantity of ourcountry movement telephone telephony already more than 200000000s and just at with very quickvelocity fast fierce development Will exceed the quantity of the fixed telephone soon. In additionnotebook the Portable MP3 players Portable DVD player the Internet access equipment Portable GPSterminating digital camera personal numerical assistant PDA etc. is also just in the fast development. The Portable Electronics put forward a very high request to the power. For example for the sakeof power supply time of the extension storage battery in addition to raising the efficiency of the Powerhave to also lower to need the machine power to exhaust For contracting the physical volume of thePortable Electronics go to the frequency of the exaltation switch Power increase the outside of thepower density of the Power product have to also contract the physical volume of the PowerManagement spare part For improving the function of the Portable Electronics in addition to theexaltation Power of steady press accuracy have to also lower the noise of the Power. For satisfying the request of the Portable electronics product the Power technique also got aquick development. In recent years the Ni—H battery and capacity densities the capacity of the unitphysical volume of the battery of lithium ion all have an obvious exaltation. For adapting a PortableElectronics super and small scaled turn with the super and thin request for turn the domestic has alreadyreleased the square the button up type The battery of lithium ion and the lithium polymer battery andincreases continuously along with the demand the price of the Ni—H and The battery of lithium ion issignificant to descend the protection function capacity of the battery of lithium ion supervise andcontrol also gradually perfect. The Portable Electronics adoption the low-pressure bad line is steady topress a machine the high-efficiency DC/DC transformation machine with have the off-line type switchPower that the low power exhausts function of decline can lift consumedly high-efficiency. The key of the Portable Electronics is The Power manage it is the life source of the Electronics. Iset four steps to