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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yeong-Seuk Kim Bo-Mi No Jun-Sik Min Al-Sarawi, S. Abbott, D. |
| Copyright Year | 2009 |
| Description | Author affiliation: Department of Semiconductor Engineering, Chungbuk, National University, Cheongju, 361-763, Korea (Bo-Mi No; Jun-Sik Min) || School of Electrical and Electronic Engineering, University of Adelaide, SA 5005, Australia (Yeong-Seuk Kim; Al-Sarawi, S.; Abbott, D.) |
| Abstract | An on-chip current sensing circuit for current-limited minimum off-time pulse frequency modulation (PFM) boost converter is designed and verified by SPICE simulations. The current mirror pair, power and sensing MOSFETs with size ratio of K, is used in our on-chip current sensing circuit. Very low drain voltages of the current mirror pair should be matched to give accurate current sensing, so a folded-cascode opamp with a PMOS input pair is used in our design. Simulation results show that current sensing is accurate with properly frequency compensated opamp; over-compensation results in inaccuracies in current sensing. |
| Starting Page | 544 |
| Ending Page | 547 |
| File Size | 414493 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781424450343 |
| DOI | 10.1109/SOCDC.2009.5423823 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2009-11-22 |
| Publisher Place | Korea (South) |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | current-sensing circuit minimum off-time Frequency modulation Circuit simulation Pulse width modulation Frequency conversion Boost converter current-limited MOSFETs Flip-flops Strontium pulse frequency modulation Pulse width modulation converters Switching frequency Voltage |
| Content Type | Text |
| Resource Type | Article |
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