标题: | 具高转换效率与高均流控制之交错式升压型转换器 High Efficiency and Precise Current Balance Skills in the Interleaved Boost Converter |
作者: | 吕承忠 Lu, Chen-Chung 陈科宏 Chen, Ke-Horng 电机学院电机与控制学程 |
关键字: | 交错式;升压式转换器;均流控制;双相;连续导通模式;不连续导通模式;Interleave;Boost converter;Current balance;Two Phase;CCM;DCM |
公开日期: | 2012 |
摘要: | 近年来,IT产业技术快速发展,轻量化、薄形化和高效能已然成为智慧型手机、平板电脑等可携式电子产品必备的规格。然而轻量化、薄形化和高效能产生了许多产品设计上的困扰。为了比传统的电压或电流控制的转换器在负载电流变化时能有更短的暂态反应时间,可以增加切换频率来达到快速反应的目的。但是增加切换频率会产生更大的功率消耗、低转换效能以及缩短电池的寿命。此外切换时损失的能量会产生热能,降低功率电晶体的可靠度使用。大电流输出往往暗示必须使用更大体积的电感,这可能造成使用规格上的困扰。 本论文提出一个具高转换效率与高均流控制之交错式升压型转换器,可以加速暂态响应速度并且在全载范围维持高的转换效率。除此之外,并且提出主仆式平均电流法,改良了传统主动均流法(Active Current Sharing Method)要额外的接脚去接收个别相位的电流资讯,更不须使用传统斜率控制法(Droop Method)使用额外的电阻来做为电流侦测的媒介,造成多余功率的损耗,不仅简单更精确的达到均流控制的目的。 本电路是以VIS 所提供之0.25μm 1P3M 制程参数来设计。当模拟输入电压为3.3V及输出电流为300mA时,整体电路的转换功率效率最高可以达到94.3%,因此非常适用于智慧型手机与平板电脑等可携式电子产品。 With the rapid evolving IT technologies, today, lightweight, thin shape and high performance has become the essential specifications of smartphones, tablet PCs and other portable electronic products. However lightweight, thin and high-performance produced many products designed troubled. Than a conventional voltage or current controlled converter when the load current changes can have a shorter transient response time, can increase the switching frequency to achieve the purpose of the rapid reaction. However, increasing the switching frequency will produce greater power consumption, low conversion efficiency and reduce the battery life. In addition, the energy loss when the switch will generate heat, reduce the reliability of the power transistors use. The high-current output often implies the need to use a larger volume of the inductor, which may cause the troubles on the use of specifications. This paper presents a high efficiency and precise current balance skills in the interleaved boost converter can accelerate the boost converter's transient response speed and maintain a high conversion efficiency in the entire load range. In addition, this paper also proposed a method of Master and Average Current . This method Improved the traditional active current (Active Current Sharing Method) additional pins to receive individual phase current information, but also do not need to use additional resistors to detect the current medium using traditional slope control (Droop Method), causing excess loss of power, not only simpler and more precise control purposes. This circuit is implemented with VIS 0.25μm 1P3M CMOS technology. Simulation result show that the efficiency of the interleaved boost converter with CSC is 94.3% when input voltage is 3.3V and output load current is 300mA. So, this proposed circuit is very suitable for smart phone and Tablet. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT079867535 http://hdl.handle.net/11536/48687 |
显示于类别: | Thesis |