A Fast-Transient-Response HCC Buck Converter with Pseudo-Current- Detection Techniques and An OLED Current-Controlled Driver Using High-Voltage Processes

• Main Authors: Xiang-Jen Jao, 饒翔仁
• Other Authors: 陳建中
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/22978j

碩士 === 國立臺北科技大學 === 電子工程系 === 106 === The proposed circuit of the thesis is a fast-transient response HCC buck converter with pseudo-current-detection techniques in the first part. The pseudo-current-detection circuit is simpler and less transistors than the traditional current sensing circuit. The hysteresis-current-controlled (HCC) circuit can achieve the fast transient response. The proposed converter can supply an output voltage from 1V to 2.5V, output load current range from 0.05A to 0.5A, when the supply voltage is 3.3V. When the supply voltage is 3.3V. The switching frequency of the proposed converter is 1 MHz, when output voltage is 2.5V. The proposed buck converter has been fabricated with TSMC 0.35-μm CMOS 2P4M process, the total chip area is 1.5 × 1.5 mm2 (with PADs). The proposed circuit of the thesis is an OLED current controlled driver using high-voltage processes in the second part. This proposed circuit, which mainly provides the current to next OLED circuit, is designed according to the datasheet on the market. The work current is from 185mA to 310mA. The overall circuit can be divided into two parts, an AC-DC converter and an OLED current driver. The OLED driver, which can tolerate 110V to 800V, uses PWM control. The OLED driver has been fabricated with TSMC 0.5-μm UHV800V 2P3M process, the total chip area is 2 × 1.25 mm2 (with PADs).