【作者】 龚坤林；

【导师】 冯全源；

【作者基本信息】 西南交通大学 ， 通信与信息系统， 2006， 硕士

【摘要】 近年来便携设备使用越来越广泛,同时对电源的要求也越来越高。在电池供电的设备中要求能尽量提高电池的使用寿命,即提高电源效率。开关电源SMSP(Switch Mode Power Supply)因其内部调整管工作在高频开关状态,其等效电阻很小,消耗在调整管上的能量很小,所以电源效率可以达到70%～90%,比普通线性稳压电源提高近一倍,它代表着稳压电源的发展方向,现在已经成为稳压电源的主流产品。目前,电源管理芯片市场被国外公司占据,开发具有自主知识产权的电源管理芯片已是形势所迫。 通过对DC-DC电源芯片相关知识和电路结构的全面分析,采用0.5umBICMOS制程,设计了基准电压电路和限流电路,这两个电路可以用于采用PFM控制的BOOST芯片中。该研究成果得到了国家自然科学基金和四川省学术带头人基金的资助。 本文首先阐述了开关电源的基本工作原理和几种典型的控制方式,着重分析了采用峰值电流最小关断时间PFM控制方式的BOOST芯片。根据芯片总体结构要求和对大量的文献及专利的阅读、消化,作者设计了基准电路和限流电路这两个最重要的模块。 在完成原理分析与电路设计的基础上,本文应用EDA软件HSPICE对电路模块功能仿真及量化模拟,仿真结果均达到或优于预定指标。更多还原

【Abstract】 In recent years, as a result of widely using portable equipments, there are more requirements to power supply. The service life of Battery-powered equipment is required as long as possible, so we must improve efficiency of power supply. Because of the internal modulate transistor of SMSP (Switch Mode Power Supply) in switch mode operating at a high frequency, its equivalent impedance is very small and consumes very little energy;that the power efficiency can reach 70% ~ 90%, nearly double that of normal linear regulator . Therefore it represents the orientation of steady voltage supply, and becomes the staple product. Nowadays, foreign enterprises almost occupy the whole market of power management IC, so it is necessary to develop the power management ICs with own intellectual property.After fully analyzing the associated knowledge and circuit structure of DC-DC power IC, two circuits named bandgap reference voltage circuits and current limited circuits are implemented with 0.5um BICMOS process. They both can be used in the BOOST Converter which using the control techniques of Current-limited Minimum-off-time PFM. The research produce is supported by National Science Foundation of China and Sichuan Province Academic and Technologic Leaders Foundation.The basic principle of monolithic switching regulator is narrated at first. Then, focus on the BOOST Converter which using the control techniques of Current-limited Minimum-off-time PFM. According to the topology of the chip, the author designed the key sub-circuit blocks of the chip, such as: bandgap reference voltage circuits and current limited circuitsBased on the principle analysis and circuit design in the first part, the author simulated all sub-circuits and the whole chip circuit using EDA tools HSPICE, the simulation result indicates that the IC has achieved the expectation, both function target and electrical characteristics.更多还原