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A Current-Mode DC–DC Buck Converter with Efficiency-Optimized Frequency Control and Reconfigurable Compensation.
- Source :
-
IEEE Transactions on Power Electronics . Feb2012, Vol. 27 Issue 2, p869-880. 12p. - Publication Year :
- 2012
-
Abstract
- Large input voltage range and wide output current range are usually needed for dc-dc converters. For these input and output conditions, the converter's efficiency can be maximized by a proposed method, efficiency-optimized switching-frequency (EOF) control. The optimal switching frequency for maximizing the efficiency is generated by the low-complexity and low-power EOF generator. A reconfigurable compensator is developed for improving the load regulation and the transient response. A piecewise-linear current sensor (PLCS) is employed to reduce controller power loss without sacrificing the sensing accuracy. With the aforementioned three proposed methods, a monolithic current-mode dc-dc buck converter is implemented in a 0.35-μm 3.3-V CMOS process. The measured power-loss reductions and efficiency improvements achieve 16 and 15 mW, and 16% and 1%, both in light and heavy loads, respectively. The load regulation and the transient recovery time are improved by 40 mV and 12 μs, respectively, while the PLCS can reduce 3 mW of power loss. Compared with other published converters in 0.35-μm CMOS process, the implemented converter achieves a higher efficiency of 96.3% and smaller chip area of 0.97 mm. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 27
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 101263785
- Full Text :
- https://doi.org/10.1109/TPEL.2011.2162079