Tapped-inductor buck converters with a lossless clamp circuit

Tapped-inductor buck converters allow great improvements in the performance of 12 V-input voltage regulator modules (VRMs). However, the converters' inductor leakage energy problem limits their applications. This paper proposes a simple clamp circuit, which can effectively clamp the witch turn-off voltage spike and totally recover the leakage energy. Simulation and experimental results prove the significant improvement afforded by the proposed clamp circuit.

[1]  F. C. Lee,et al.  A high power density, high efficiency and fast transient voltage regulator module with a novel current sensing and current sharing technique , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).

[2]  J. Sebastián,et al.  Static and dynamic modeling of tapped-inductor dc-to-dc converters , 1987, IEEE Power Electronics Specialists Conference.

[3]  Peng Xu,et al.  Integrated planar inductor scheme for multi-module interleaved quasi-square-wave (QSW) DC/DC converter , 1999, 30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321).

[4]  S. Ben-Yaakov,et al.  A SPICE compatible model of tapped-inductor PWM converters , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[5]  Peng Xu,et al.  The active-clamp couple-buck converter-a novel high efficiency voltage regulator modules , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).

[6]  Peng Xu,et al.  Comparison of three topology candidates for 12 V VRM , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).