Switching Loss Analysis Considering Parasitic Loop Inductance With Current Source Drivers for Buck Converters

In this letter, the switching loop inductance was investigated on the current-source drivers (CSDs). The analytical model was developed to predict the switching losses. It is noted that although the CSDs can greatly reduce the switching transition time and switching loss, the switching loop inductance still causes the current holding effect on the CSDs. This results in high turn-off loss for the control MOSFET in a buck converter. An improved layout was proposed to achieve minimum switching loop inductance. The experimental results verified the significant switching loss reduction owing to the proposed layout of a 1-MHz buck converter with 12-V input, and 1.3-V and 30-A output.

[1]  Zhiliang Zhang,et al.  Discontinuous-Current-Source Drivers for High-Frequency Power MOSFETs , 2010, IEEE Transactions on Power Electronics.

[2]  Dragan Maksimovic,et al.  A MOS gate drive with resonant transitions , 1991, PESC '91 Record 22nd Annual IEEE Power Electronics Specialists Conference.

[3]  P. Mattavelli,et al.  Effects of Parasitic Components in High-FrequencyResonant Drivers for SynchronousRectification MOSFETs , 2008, IEEE Transactions on Power Electronics.

[4]  Zhiliang Zhang,et al.  A 1-MHz, 12-V ZVS Nonisolated Full-Bridge VRM With Gate Energy Recovery , 2010, IEEE Transactions on Power Electronics.

[5]  F.C. Lee,et al.  Analytical loss model of power MOSFET , 2006, IEEE Transactions on Power Electronics.

[6]  M.M. Jovanovic,et al.  1.8-MHz, 48-V Resonant VRM: Analysis, Design, and Performance Evaluation , 2006, IEEE Transactions on Power Electronics.

[7]  W. Eberle,et al.  Optimal Design of Resonant Gate Driver for Buck Converter Based on a New Analytical Loss Model , 2008, IEEE Transactions on Power Electronics.

[8]  Yan-Fei Liu,et al.  A New High Efficiency Current Source Driver With Bipolar Gate Voltage , 2012, IEEE Transactions on Power Electronics.

[9]  W. Eberle,et al.  A Practical Switching Loss Model for Buck Voltage Regulators , 2009, IEEE Transactions on Power Electronics.

[10]  W. Eberle,et al.  A 1-MHz High-Efficiency 12-V Buck Voltage Regulator With a New Current-Source Gate Driver , 2008, IEEE Transactions on Power Electronics.

[11]  Yan-Fei Liu,et al.  A high efficiency current source driver with negative gate voltage for buck voltage regulators , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[12]  Alex Huang,et al.  A new resonant gate driver for switching loss reduction of high side switch in buck converter , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[13]  Hideaki Fujita.  A Resonant Gate-Drive Circuit Capable of High-Frequency and High-Efficiency Operation , 2010 .

[14]  D.J. Perreault,et al.  Transistor Selection and Design of a VHF DC-DC Power Converter , 2008, IEEE Transactions on Power Electronics.

[15]  Sheng Ye,et al.  A New Resonant Gate Drive Circuit for Synchronous Buck Converter , 2007, IEEE Transactions on Power Electronics.

[16]  H. Shah,et al.  Analytical modeling and experimental evaluation of interconnect parasitic inductance on MOSFET switching characteristics , 2004, Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04..

[17]  Yan-Fei Liu,et al.  A new discontinuous Current Source Driver for high frequency power MOSFETs , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[18]  W. Eberle,et al.  A Current Source Gate Driver Achieving Switching Loss Savings and Gate Energy Recovery at 1-MHz , 2008, IEEE Transactions on Power Electronics.