Open Access10 MHz boost converter with subthreshold voltage startup and predictive dead‐time techniques for energy‐harvesting systems
Author(s) -
Huang Wenbin,
Liao Xufeng,
Liu Lianxi
Publication year - 2020
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2019.1226
Subject(s) - subthreshold conduction , overshoot (microwave communication) , dead time , voltage , transient (computer programming) , model predictive control , boost converter , control theory (sociology) , transient response , computer science , electronic engineering , engineering , electrical engineering , physics , transistor , control (management) , quantum mechanics , artificial intelligence , operating system
A 10 MHz synchronous boost converter with the subthreshold startup scheme and predictive dead‐time control for energy‐harvesting systems is presented in this study. The input feed‐forward technique is adopted to achieve a fast line response, and a three‐stage startup technique is proposed to realise subthreshold voltage startup without using any extra startup circuits or special devices. Moreover, the efficiency of the high‐frequency converter can be improved by the proposed predictive dead‐time control with a high resolution of ∼300 ps. The proposed converter is implemented in a standard 0.18 μm complimentary metal oxide semiconductor process and occupies a die area of 1.4 × 1.5 mm 2 . Experimental results show that the input voltage ranges from 0.3 to 1.5 V at 1.8 V output, and the minimum startup voltage is 0.3 V. Under V IN = 1.5 V, V OUT = 1.8 V and 150 mA load, the power efficiency can be improved by 2.6% because of the proposed predictive dead‐time control. The peak efficiency can reach 90.7% under V IN = 1.5 V. The line transient response can be improved with small overshoot voltage at the output.