Light-Load Efficiency Enhancement in wave tracking control DC-DC Buck Converter

• Main Authors: Tseng, Chien-Feng, 曾建峰
• Other Authors: Chen, Ke-Horng
• Format: Others
• Language: en_US
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/y22484

碩士 === 國立交通大學 === 電機學院電子與光電學程 === 107 === Constant-on-time (COT) control with an extra current feedback in convertional buck converter has the disadvantage is output regulation accuracy is greatly deteriorated by its DC offset voltage, and the opposite of reaction between ouput voltage and extra current current feedback signal deteriorates transient response. In wave tracking technique in constant on time (COT) control DC-DC buck converter has been reducing load-dependent DC offset voltage for load regulation, and also improves instantly opposite reaction between ouput voltage and inductor current. Unfortunately, the disadvantage for this technique is poor power efficiency at light load. This dissertation presents a high light-load efficiency wave tracking control buck converter with inductor current detector. The power efficiency gets greatly improvement from 52.7% to 70.12%.