High efficiency and low electromagnetic interference boost DC-DC converter
A synchronous boost DC-DC converter with an adaptive dead time control （DTC） circuit and antiringing circuit is presented. The DTC circuit is used to provide adjustable dead time and zero inductor current detection for power transistors and therefore, a high efficiency is achieved by minimizing powe...
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| Published in | Journal of semiconductors Vol. 35; no. 4; pp. 98 - 105 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.04.2014
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-4926 |
| DOI | 10.1088/1674-4926/35/4/045002 |
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| Summary: | A synchronous boost DC-DC converter with an adaptive dead time control （DTC） circuit and antiringing circuit is presented. The DTC circuit is used to provide adjustable dead time and zero inductor current detection for power transistors and therefore, a high efficiency is achieved by minimizing power losses, such as the shoot-through current loss, the body diode conduction loss, the charge-sharing loss and the reverse inductor current loss. Simultaneously, a novel anti-ringing circuit controlled by the switching sequence of power transistors is developed to suppress the ringing when the converter enters the discontinuous conduction mode （DCM） for low electromagnetic interference （EMI） and additional power savings. The proposed converter has been fabricated in a 0.6 #m CDMOS technology. Simulation and experimental results show that the power efficiency of the boost converter is above 81% under different load currents from 10 to 250 mA and a peak efficiency of 90% is achieved at about 100 mA. Moreover, the ringing is easily suppressed by the anti-ringing circuit and therefore the EMI noise is attenuated. |
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| Bibliography: | DC-DC; dead time; discontinuous conduction mode; electromagnetic interference; anti-ringing 11-5781/TN A synchronous boost DC-DC converter with an adaptive dead time control （DTC） circuit and antiringing circuit is presented. The DTC circuit is used to provide adjustable dead time and zero inductor current detection for power transistors and therefore, a high efficiency is achieved by minimizing power losses, such as the shoot-through current loss, the body diode conduction loss, the charge-sharing loss and the reverse inductor current loss. Simultaneously, a novel anti-ringing circuit controlled by the switching sequence of power transistors is developed to suppress the ringing when the converter enters the discontinuous conduction mode （DCM） for low electromagnetic interference （EMI） and additional power savings. The proposed converter has been fabricated in a 0.6 #m CDMOS technology. Simulation and experimental results show that the power efficiency of the boost converter is above 81% under different load currents from 10 to 250 mA and a peak efficiency of 90% is achieved at about 100 mA. Moreover, the ringing is easily suppressed by the anti-ringing circuit and therefore the EMI noise is attenuated. Li Yajun, Lai Xinquan, Ye Qiang and Yuan Bing（ 1 Institute of Electronic CAD, Xidian University, Xi＇an 710071, China 2Key Laboratory of High-Speed Circuit Design and EMC, Ministry of Education, Xidian University, Xi＇an 710071, China） |
| ISSN: | 1674-4926 |
| DOI: | 10.1088/1674-4926/35/4/045002 |