Design of Smart Programmable Buck-Boost Converter

• Main Authors: LIU, CHEN-YUEH, 劉振岳
• Other Authors: SHEU, MING-HWA
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/9q6438

碩士 === 國立雲林科技大學 === 電子工程系 === 108 === With the change of times, the speed of technological progress is changing rapidly, and the utilization rate of Internet of Things devices is increasing year by year. At present, the wireless sensing nodes installed outdoors usually have both energy collection and storage devices, thereby reducing reliance on the transmission lines to increase the elasticity of the device environment. In order to provide the power supply for such devices and to manage the charge and discharge of the battery at the same time, the multi-input-multi-output (MIMO) power management IC is often used in the system. Therefore, this thesis proposes the use of 0.18-μm CMOS power management IC, combined with advanced RISC Machine (ARM) implementation, in a mixed signal design with the cell-based ARM processor circuit synthesis, and the required analog circuit is completed using full-custom and integrated into the digital circuit on the same chip. The proposed CDL-PWM can save power and area, compared with the previous design, it can save 31.1% of power at D=50% and 65.3% power when D=0%. The imbedded microprocessor circuit also achieves A) program-controlled output to save the cost of redesigning the circuit, B) simultaneously processing sensing information without the need for additional computing units, and C) scanning the operating frequency to achieve maximum conversion efficiency. The smart programmable buck-boost converter is implemented based on TSMC 180 nm Mixed Signal RF General Purpose Process (T18). System simulation can achieve both a stable 1.8V battery voltage and 0.7 to 1.2V programmable voltage at the same time at input range of 0.9 to 3.3V, with a maximum efficiency of 85%.