低压迟滞电流模升压型DC-DC转换器XD1410的设计

发布时间：2018-06-20 05:53

本文选题：开关电源 + Boost型DC-DC　；参考：《西安电子科技大学》2014年硕士论文

【摘要】：本论文基于西安电子科技大学电路CAD所超高速电路设计与电磁兼容教育部重点实验室科研项目,设计了一款低输入电压,高效率,低静态电流,高集成度,快速响应的迟滞电流模Boost型DC-DC电源转换器XD1410。XD1410可应用于多种便携式电子产品中,主要应用在无线鼠标中,因此众多参数均根据无线鼠标的应用情况来决定的。XD1410采用启动振荡器电路和电荷泵电路以实现低输入电压启动;采用迟滞电流模式设置恒定的电感电流纹波,以得到较小的输出电压纹波;内置过温保护、过流保护和过零保护等模块防止芯片在应用过程中由于环境因素的改变而受到损坏,影响其再次使用。XD1410可自动在重载和轻载之间进行模式切换,提高系统的转换效率,尤其是在轻载情况下的转换效率,以减少轻载模式下的开关损耗和驱动损耗。该芯片采用同步整流方式且内部无振荡器模块,简化了芯片外围器件和电路内部结构,缩小了版图面积,从而节约成本。论文首先阐述了电源管理类芯片的发展现状和趋势,阐明作者研究此芯片以及写此论文在市场应用方面的重要意义。然后分析了开关电源电路中的电感式升压型开关电源电路和电容式电荷泵电路的基本拓扑结构和工作原理,并介绍了开关电源内部常采用的两种调节模式PWM和PFM的优缺点和电路内部采用不同采样电路的优缺点,从而帮助读者理解如何根据自己电路的不同功能选择不同的调节模式和采样电路;紧接着根据芯片的功能要求和性能指标,对XD1410进行了系统级设计,并从环路稳定性分析如何选择开关电源的外围器件以及内部补偿器件;接下来重点分析和介绍了XD1410内部采用的关键子模块,并给出了性能仿真波形;紧接着给出了该芯片的整体性能仿真情况和实际测试结果的应用范围;接下来说明了该芯片设计过程中具有的不足以及对该芯片的期望;最后是致谢。本文采用0.35μm CMOS工艺,运用Cadence下的Hspice/Spectre等软件对该芯片的子电路以及整体性能进行了前仿和后仿验证,以防器件中的寄生参数对所设计电路有影响。仿真结果表明,该芯片在0.8V到5V的输入电压范围内能最大输出200mA负载电流,无线鼠标在应用过程中的带载电流为40mA,满足设计要求。静态电流仅为5μA,大大减小了功率损耗,延长了该芯片的使用寿命。电感电流纹波为固定200mA,输出电压纹波小于10mV,不会造成无线鼠标的误触发,转换开关的最大流限为600mA。该芯片采用SOT23-5封装,节约成本,提高芯片集成度。输入电源电压和负载电流的改变均不会影响输出电压的稳定性,达到市场应用范围要求。
[Abstract]:In this paper, a low input voltage, high efficiency, low static current and high integration is designed based on the research project of the key laboratory of the Ministry of Education for the design and electromagnetic compatibility of ultra-high speed circuit in the CAD Institute of Circuit of Xi'an University of Electronic Science and Technology. The fast response hysteresis current mode boost DC-DC power converter XD1410.XD1410 can be used in a variety of portable electronic products, mainly in wireless mouse. Therefore, many parameters are determined according to the application of the wireless mouse. XD1410 uses the starting oscillator circuit and the charge pump circuit to realize the low input voltage start, and the hysteresis current mode is used to set the constant inductance current ripple. In order to obtain smaller output voltage ripple, built-in protection, such as over-temperature protection, over-current protection and zero-crossing protection, etc., to prevent the chip from being damaged by the change of environmental factors in the process of application, It can automatically switch the mode between heavy load and light load to improve the efficiency of system conversion, especially in the case of light load, so as to reduce the switching loss and drive loss in light load mode. The chip adopts synchronous rectifier mode and has no oscillator module, which simplifies the peripheral device and the internal structure of the circuit, reduces the layout area and saves the cost. In this paper, the current situation and trend of power management chip are introduced, and the significance of the author's research on the chip and its application in the market are expounded. Then, the basic topology and working principle of inductance boost switching power supply and capacitive charge pump circuit are analyzed. The advantages and disadvantages of PWM and PFM, which are often used in switching power supply, and the advantages and disadvantages of different sampling circuits in the circuit are introduced. It helps readers understand how to select different regulating modes and sampling circuits according to their own circuit functions. Then, according to the functional requirements and performance indicators of the chip, the system level design of XD1410 is carried out. How to select the peripheral devices and internal compensation devices of the switching power supply is analyzed from the stability analysis of the loop. Then the key sub-modules used in XD1410 are analyzed and introduced, and the performance simulation waveform is given. Then the simulation of the chip performance and the application range of the actual test results are given. Then the shortcomings of the chip design process and the expectations of the chip are explained. Finally, the thanks are given. In this paper, a 0.35 渭 m CMOS process is used to verify the sub-circuit and overall performance of the chip by using Hspice / Spectre software under Cadence to prevent parasitic parameters from affecting the designed circuit. The simulation results show that the chip can output the maximum load current of 200mA in the input voltage range of 0.8 V to 5 V, and the load current of the wireless mouse is 40 Ma in the application process, which meets the design requirements. The static current is only 5 渭 A, which greatly reduces the power loss and prolongs the service life of the chip. The inductance current ripple is fixed at 200mAand the output voltage ripple is less than 10mV, which will not cause the misfiring of the wireless mouse. The maximum current limit of the switching switch is 600mA. The chip adopts SOT 23-5 package to save cost and improve chip integration. The change of input voltage and load current will not affect the stability of output voltage and meet the requirements of market application.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM46

【相似文献】