非隔离型低压同步Buck型DC-DC电源芯片XD1505的设计

发布时间：2018-02-11 19:16

本文关键词： 直流降压变换峰值电流模同步整流高效率　出处：《西安电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：电能的利用极大的提高了人们的生活质量,然而长期以来人们对电能的使用效率一直处在中等偏下的水平,造成能源的严重浪费。对提高电能利用效率的不断追求促使了电源管理芯片的产生和发展。由于集成电路技术的飞速发展以功率MOSFET为代表的全控型器件得以出现,促进了电源管理设备向着高频和中小化方向发展,为电源芯片的小型化提供了条件。较早出现的LDO线性稳压电源,虽然成本低、噪音小,但其体积较大,电能转换效率不高。而开关型稳压电源,由于功率管工作在开关状态,只消耗很小的导通损耗和开关损耗,效率较高,并且随着开关频率的提高,转换器的尺寸可以做的很小。鉴于这些优点直流开关电源在目前的电源行业得到了广泛的认可和使用。本次设计的芯片采用了峰值电流模式,提高了其响应速度。芯片集成了测试模块,可以通过对芯片引脚加脉冲对其指标进行测试。论文分章节分别论述了开关电源的基本拓扑结构,工作机理等。并安排章节重点的对芯片的振荡器模块、基准电路模块、以EA(误差放大器)为核心的环路稳定性补偿网络进行了详细的描述,由于半导体器件的性能参数会在一定的范围内变化,为此本芯片中的前两个模块分别加了Trim电路,保证了芯片整体性能的稳定。本论文基于集成电路教育部重点实验室的直流开关电源项目,设计的这款基于0.5μm CMOS工艺BUCK型DC-DC直流开关稳压电源。采用了Spectre仿真软件对芯片的各个模块电路以及核心电路进行了有效的仿真,仿真结果显示芯片的各项性能指标均达到了设计的要求。
[Abstract]:The utilization of electric energy has greatly improved the quality of life of people. However, for a long time, the efficiency of using electric energy has been at a moderate and lower level. Because of the rapid development of integrated circuit technology, the full control devices, represented by power MOSFET, have emerged, and the continuous pursuit of improving the efficiency of power utilization has promoted the generation and development of power management chips. It promotes the development of power management equipment in the direction of high frequency and medium and small, and provides the condition for the miniaturization of power chip. Although the earlier linear stabilized power supply of LDO, although it has low cost and low noise, its volume is large. The power conversion efficiency is not high. But the switching power supply, because the power transistor works in the switching state, only consumes very little on and off loss, the efficiency is high, and with the increase of switching frequency, The size of the converter can be very small. In view of these advantages of DC switching power supply in the current power industry has been widely recognized and used. The response speed is improved. The chip integrates the test module and can be tested by adding pulse to the pin of the chip. The basic topology of the switching power supply is discussed in this paper. Working mechanism and so on. The oscillator module, the reference circuit module and the loop stability compensation network with EAA as the core are described in detail. Because the performance parameters of semiconductor devices will vary within a certain range, the first two modules in this chip are respectively added with Trim circuits. This paper is based on the DC switching power supply project of the key laboratory of the Ministry of Integrated Circuits Ministry of Education. The design is based on 0.5 渭 m CMOS process BUCK type DC-DC DC switching power supply. Each module circuit and core circuit of the chip are simulated effectively by Spectre simulation software. The simulation results show that the performance of the chip meets the requirements of the design.
【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】：2015
【分类号】：TM46

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