使用合成漣波磁滯控制機制的快速暫態響應降壓式轉換器

A Fast Response Buck Converter Using Synthetic Ripple Hysteresis Control Scheme

蔡宗達(Chung-Ta Tsai)

指導教授 ： 周懷樸

國立清華大學/原子科學院/工程與系統科學系/碩士(2009年)

https://doi.org/10.6843/NTHU.2009.00761

摘要

本論文提出一個使用合成漣波磁滯控制機制的直流對直流降壓型轉換器，具有快速暫態響應路徑可以定義磁滯帶( Hysteresis band)寬度。在負載電流改變時，磁滯帶寬度、切換頻率與責任週期同時調變以加速穩壓，因此可減少輸出電壓之回復時間與過驅電壓，改善暫態響應。由於本論文提出之架構除了輸出電感與電容，不需要其他外部補償元件，因此可節省電路板面積，適用於可攜式裝置。全電路使用TSMC 0.35μm 2P4M的製程技術做設計與模擬分析，晶片之面積為1914μm × 2096μm，電路輸入電壓範圍為2.7V-4.2V，輸出電壓為2V。全晶片模擬結果顯示當負載電流在100毫安與500毫安間變化時，輸出電壓回復時間在10微秒以內，最大轉換效率為85.74%。

關鍵字

磁滯控制 ； 合成漣波 ； 快速暫態 ； 磁滯帶調變

並列摘要

This thesis presents an integrated DC-DC buck converter using the synthetic ripple hysteresis control scheme with a fast transient path to define the boundary of hysteresis band. The hysteresis band and switching frequency depend on load current changes; therefore, it accelerates regulation and reduces overshoot. The present work requires no external compensation capacitors and can be implemented with integrated technology for on-chip applications. The whole chip is designed and simulated with TSMC 0.35μm 2P4M fabrication process data. The input supply voltage range of this work is 2.7V-4.2V, and the output voltage is 2V. The chip area is 1914μm × 2096μm. Full chip simulation results indicated output voltage recovery time is shortened within 10µs under load current condition between 100mA to 500mA, and the maximum conversion efficiency is 85.74%.

並列關鍵字

hysteresis control ； synthetic ripple ； fast transient ； hysteresis band modulation

參考文獻

2. Hoi Lee, Philip K. T. Mok and Ka Nang Leung, “Design of Low-power Analog Drivers Based on Slew-rate Enhancement Circuits for CMOS Low-dropout Regulators,” IEEE Trans. Circuits and Systems II, vol. 52, pp. 563-567, Sep. 2005

3. Favrat P., Deval P., Declercq and M.J., “A High-efficiency CMOS Voltage Doubler,” IEEE J. Solid-State Circuit, vol. 33, pp. 410-416, Mar. 1998

7. Feng Su, Wing-Hung Ki and Chi-Ying Tsui, “Ultra Fast Fixed-Frequency Hysteretic Buck Converter With Maximum Charging Current Control and Adaptive Delay Compensation for DVS Applications,” IEEE J. Solid-State Circuit, vol. 43, pp. 815-822, Apr. 2008

8. Yu-Huei Lee, Shih-Jung Wang, Chun-Yu Hsieh and Ke-Horng Chen, “Current Mode DC-DC Buck Converters With Optimal Fast-transient Control,” IEEE International Symposium on Circuits and Systems, pp. 3045-3048, May. 2008

Controlled DC–DC Converter with Novel Current Sharing,” IEEE Trans. Power