液晶顯示器用之切換式直流對直流升壓控制晶片設計

Chip Design of the Switched-mode Boost DC-DC Control for TFT-LCD

趙祥雲(Hsiang-Yun Chao)

指導教授 ： 宋國明

國立臺北科技大學/機電學院/通訊與資訊產業研發碩士專班/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00537

摘要

本論文提出ㄧ種不需鋸齒波產生器和誤差放大器的架構，其係利用比較器和輸出固定責任比的振盪器來替代鋸齒波訊號，藉此控制開關的動作，完成升壓式直流電壓控制晶片，以提供15伏特直流偏壓給小尺寸液晶顯示器(Liquid Crystal Display, LCD)。該控制晶片係利用TSMC 0.35um 2P4M 混合信號製程來設計，所完成的晶片面積大小約為0.42*0.52 mm2。當輸入電壓範圍為3.0-3.6V與工作頻率在1 MHz條件下，其輸出電壓可維持在15V 10%以內，且其輸出電流約為50mA，效率也可維持在85%以上。

關鍵字

直流對直流轉換器 ； 脈衝寬度調變 ； 脈衝頻率調變 ； 升壓

並列摘要

This paper proposes a switched-mode boost DC-DC converter, which doesn’t need not only a saw-tooth wave generator but also an error amplifier. By using a comparator and a fixed duty-cycle oscillator, the proposed controller will offer a high DC voltage of 15V to drive the LED backlight driver for Liquid Crystal Display (LCD). The chip area is about 0.42*0.52 mm2 , which is implemented with TSMC 0.35 um 2P4M mixed-mode process. Under the conditions of the input supply voltage of 3.0-3.6 V and the signal frequency of 1 MHz, the chip can provide a regulated 15V 10% output voltage and a power efficiency of greater than 85%.

並列關鍵字

DC to DC Converter ； Boost ； Pulse Width Modulation ； Pulse Frequency Modulation ； Power Management

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