一种高效率电流模式升压dcdc转换器的设计-design of a high efficiency current mode boost dcdc converter.docxVIP

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一种高效率电流模式升压dcdc转换器的设计-design of a high efficiency current mode boost dcdc converter.docx

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一种高效率电流模式升压dcdc转换器的设计-design of a high efficiency current mode boost dcdc converter

AbstractWith the widely utilization of portable devices, the rapid process for computer, communication and automobile industry actuates constantly the advancement of the technique of switching power supply. As the application field expanded, the demand on high efficiency, high reliability and high power density becomes the new design challenge to switching power supply IC.Based on the in-deep study of the interrelated technique of the DC-DC boost converters, a design scheme of the switching regulator of current-mode PWM boost converters operating at a fixed frequency of 1.2MHz is presented. The basic principle of the SMPS is proposed at first, and then the working principles of the converter. By consideration the key factors of the circuit design the structure of the converter is defined, then the design procedure of some primary function blocks are presented. Lastly, The sub-block circuits are also designed and simulated with Hspice. The result shows that the desired functions and performance are achieved.The higher efficiency is one of the most important design guidelines for DC-DC switching regulators, all the time. In this thesis a pithy circuit design style is introduced, that insures the converter obtains the higher efficiency and the industrys high power density with the circuit functions fully achieved.The design is implemented base on the 0.6 ?mBCD technologies, with the fullysystem-level simulations. The results indicate that the controller has a fast transient response with small output ripple coefficient, upstanding load regulation and quite fine efficiency.Keywords: switch mode power supplycurrent-mode PWMerror amplifier bandgap-reference目录摘要 ··············································································· IAbstract ··············································································· II1 绪论1.1 开关电源技术的研究现状 ···················································(1)1.2 开关电源技术的发展趋势 ·················································