應用在全載範圍之高效率多相式升壓轉換器

Abstract

一般電子產品中，多半會加入電源控管電路，如直流-直流轉換器來將前端的供應電壓源轉換為穩定的輸出電壓以供內部電路使用。因此對於高轉換效率、高精準度且體積小之直流-直流轉換器的需求愈來愈高。

本論文主要目的係研製一具有高效率、低漣波電壓、及高輸出電流之多相式升壓型轉換器。多相交錯式控制策略不但保有脈波寬度調變(PWM)升壓型轉換器之優點，且在高輸出功率下更可改善功率元件高耐流、儲能電感體積過大、輸出電容過大及EMI 濾波器體積等問題。

本電路是以VIS 所提供之0.25μm 1P3M 製程參數來設計。當模擬輸入電壓為3.3V及輸出電流為300mA時，整體電路的轉換功率效率最高可以達到94.3％，因此非常適用於智慧型手機與平板電腦等可攜式電子產品。

Power management circuit, such as DC-DC converter, is widely used in electronics to convert power supply to a required stable output voltage for electric circuits. Therefore, there is an increasing demand for the DC-DC converters with high efficiency, high accuracy, and low cost. This thesis is focused on the design and implementation of a multiphase interleaved boost DC-DC converter to achieve high efficiency, low ripple voltage and high output current. A multiphase interleaved boost DC-DC converter features the advantages of a PWM boost converter. In addition, the voltage and current ratings of the power switches, and the volumes of inductors, output capacitors and EMI filters can be reduced. 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.