A Constant-on-Time Control DC–DC Buck Converter With the Pseudowave Tracking Technique for Regulation Accuracy and Load Transient Enhancement
| Autor: | Han-Hsiang Huang, Ke-Horng Chen, Chao-Jen Huang, Wen-Hau Yang, Ying-Hsi Lin, Wei-Ting Lin, Tsung-Yen Tsai, Shian-Ru Lin |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Input offset voltage Buck converter 020208 electrical & electronic engineering 020206 networking & telecommunications 02 engineering and technology law.invention Capacitor law Control theory Load regulation 0202 electrical engineering electronic engineering information engineering Voltage regulation Transient (oscillation) Transient response Electrical and Electronic Engineering DC bias |
| Zdroj: | IEEE Transactions on Power Electronics. 33:6187-6198 |
| ISSN: | 1941-0107 0885-8993 |
| DOI: | 10.1109/tpel.2017.2746659 |
| Popis: | Constant-on-time (COT) control with an additional current feedback path in conventional buck converters can remove the need of large equivalent series resistance (ESR) at the output capacitor but it induces degraded output voltage regulation accuracy and slow transient response owing to opposite reaction between the output voltage and the additional current feedback information. Therefore, this paper proposes the pseudowave tracking (PWT) technique to reduce the load-dependent dc offset voltage of output load regulation while keeping the fast transient response similar to conventional COT buck converter with large ESR. The PWT technique further improves the transient response instantly by extending on-time and off-time periods during light-to-heavy and heavy-to-light load changes, respectively. The test chip fabricated in 28 nm CMOS process has demonstrated the improvement of offset voltage from 42 to 4 mV, while the transient response can be improved to 4 and 5 μs with load changes from 0.3 to 1.7 A and vice versa, respectively. |
| Databáze: | OpenAIRE |
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