Current-sensing is used widely in smart power chips, especially in DC/DC converter for voltage regulator modules (VRM), implemented with interleaved synchronous rectifier buck converters. The interleaved technique main difficulty is due to its current-sharing control between the several modules. Besides, if the used control technique is current-mode type, it is necessary create a ramp signal proportional to current on the inductor. In this paper, a lossless current-sensing method, solving the major disadvantages of the current-mode control and implementing a current-sharing technique, is proposed. This innovative technique is tested in a two-module interleaved buck converter.
DI BLASI GM, G CAPPONI, P LIVRERI, F MARINO (2005). A New Current Mode Control for DC-DC Converter. In INTELEC, International Telecommunications Energy Conference (pp.335-340) [10.1109/INTLEC.2005.335115].
A New Current Mode Control for DC-DC Converter
DI BLASI, Giuseppe Maria;CAPPONI, Giuseppe;LIVRERI, Patrizia;
2005-01-01
Abstract
Current-sensing is used widely in smart power chips, especially in DC/DC converter for voltage regulator modules (VRM), implemented with interleaved synchronous rectifier buck converters. The interleaved technique main difficulty is due to its current-sharing control between the several modules. Besides, if the used control technique is current-mode type, it is necessary create a ramp signal proportional to current on the inductor. In this paper, a lossless current-sensing method, solving the major disadvantages of the current-mode control and implementing a current-sharing technique, is proposed. This innovative technique is tested in a two-module interleaved buck converter.File | Dimensione | Formato | |
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