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http://hdl.handle.net/1783.1/3271
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| Title: | Design of fast-response on-chip current sensor for current-mode controlled buck converters with MHz switching frequency |
| Authors: | Man, Tsz Yin
Mok, Philip
Chan, Mansun |
| Keywords: | Power convertors
Current sensor design
Error amplifier |
| Issue Date: | 2007 |
| Citation: | Proceedings IEEE Conference on Electron Devices and Solid-State Circuits, 2007. EDSSC 2007. Tainan, Taiwan, 20-22 December 2007, p. 389-392 |
| Abstract: | In this work, techniques to design fast-response on-chip current sensor for buck converter (BC) with MHz-range switching frequency is successfully developed. Unwanted voltage spike at the sensor output, which not only degrades the response time of sensor but also interrupts the operation of BC, is minimized by carefully controlling the activation and deactivation time of current sensor. Response time of sensor is also improved by specially designed error amplifier, which provides large slew-rate in both positive and negative direction during transient response and consumes only small quiescent current at steady-state operation. Sensing accuracy at small inductor current is also improved in the proposed designs. It is shown that the proposed current sensor is able to respond to a BC with 10MHz switching frequency at only 8-μA quiescent current consumption. |
| Rights: | © 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| URI: | http://hdl.handle.net/1783.1/3271 |
| Appears in Collections: | ECE Conference Papers
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| 044501441.pdf | | 2271Kb | Adobe PDF | View/Open |
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