A single-stage quasi-resonant flyback converter using a synchronous rectifier

A single-stage quasi-resonant flyback converter using the synchronous rectifier (SR) is proposed for improving power factor and system efficiency. This converter operates at the critical conduction mode with the variable frequency (VF) control to reduce the switching loss of the primary switch. The bulk capacitor voltage can be independent of the output load and kept within a practical range for the universal line input. Therefore, the problem of high-voltage stress across the bulk capacitor is reduced. The proposed converter features relatively low bulk capacitor voltage in the universal line voltage and also complies with the Standard IEC 61000-3-2 Class D limits. Moreover, since it uses the voltage-driven SR, it achieves a high efficiency. The operational principle and theoretical analysis are presented. Experimental results for a 100 W (19 V/5.3 A) adapter at the VF were obtained to show the performance of the proposed converter.

[1]  M. H. Pong,et al.  A novel high frequency current-driven synchronous rectifier applicable to most switching topologies , 2001 .

[2]  Ji-Yoon Yoo,et al.  A Novel Topology for Photovoltaic DC/DC Full-Bridge Converter With Flat Efficiency Under Wide PV Module Voltage and Load Range , 2008, IEEE Transactions on Industrial Electronics.

[3]  Chien-Ming Wang,et al.  ZVS-PWM flyback converter with a simple auxiliary circuit , 2006 .

[4]  Joo-Hyun Lee,et al.  Design of Flyback Converter with Voltage Driven Synchronous Rectifier , 2006, 2006 12th International Power Electronics and Motion Control Conference.

[5]  Hyun-Lark Do,et al.  Single-stage line-coupled ac/dc converter with high power factor and ripple-free input current , 2004 .

[6]  Gun-Woo Moon,et al.  New single-stage low dc bus voltage stress converter for universal line applications , 2003 .

[7]  Milan M. Jovanovic,et al.  Design optimization of single-stage, single-switch input-current shapers , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.

[8]  Jun-Young Lee,et al.  Single-Stage AC/DC Converter With Input-Current Dead-Zone Control for Wide Input Voltage Ranges , 2007, IEEE Transactions on Industrial Electronics.

[9]  M. Jovanovic,et al.  Adaptive off-time control for variable-frequency, soft-switched flyback converter at light loads , 2002 .

[10]  Fred C. Lee,et al.  Voltage and current stress reduction in single-stage power factor correction AC/DC converters with bulk capacitor voltage feedback , 2002 .

[11]  Henry Shu-Hung Chung,et al.  An isolated ZVS/ZCS flyback converter using the leakage inductance of the coupled inductor , 1998, IEEE Trans. Ind. Electron..

[12]  Jan A. Melkebeek,et al.  Input-Current Distortion of CCM Boost PFC Converters Operated in DCM , 2007, IEEE Transactions on Industrial Electronics.

[13]  P. Wood,et al.  Synchronous rectifiers versus Schottky diodes: a comparison of the losses of a synchronous rectifier versus the losses of a Schottky diode rectifier , 1994, Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94.

[14]  Milan M. Jovanovic,et al.  Adaptive off-time control for variable-frequency, soft-switched flyback converter at light loads , 1999, 30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321).

[15]  Y. Panov,et al.  Small-signal model of variable-frequency flyback converter , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[16]  J. J. Chen,et al.  Soft switching active-clamped dual series-resonant converter , 2010, 2010 5th IEEE Conference on Industrial Electronics and Applications.

[17]  Gun-Woo Moon,et al.  Analysis and design of a single-stage single-switch bi-flyback ac/dc converter , 2004 .

[18]  Marco A. Dalla Costa,et al.  A Single-Stage High-Power-Factor Electronic Ballast Based on Integrated Buck Flyback Converter to Supply Metal Halide Lamps , 2008, IEEE Transactions on Industrial Electronics.

[19]  Keyue Smedley,et al.  A topology survey of single-stage power factor corrector with a boost type input-current-shaper , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

[20]  Yung C. Liang,et al.  Design of smart power synchronous rectifier , 1999 .

[21]  H. E. Tacca,et al.  Power factor correction using merged flyback-forward converters , 2000 .

[22]  H. Matsuo,et al.  A novel synchronous rectification circuit using a saturable current transformer , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[23]  Jung-Min Kwon,et al.  A Single-Stage AC/DC Converter with Low Voltage Stresses and Reduced Switching Losses , 2009 .

[24]  Jung-Min Kwon,et al.  Bridgeless Boost Rectifier With Low Conduction Losses and Reduced Diode Reverse-Recovery Problems , 2007, IEEE Transactions on Industrial Electronics.

[25]  Milan M. Jovanovic,et al.  Design considerations and performance evaluations of synchronous rectification in flyback converters , 1998 .

[26]  F.C. Lee,et al.  Single-switch parallel power factor correction AC-DC converters with inherent load current feedback , 2004, IEEE Transactions on Power Electronics.

[27]  Marco A. Dalla Costa,et al.  Integrated Buck-Flyback Converter as a High-Power-Factor Off-Line Power Supply , 2008, IEEE Transactions on Industrial Electronics.

[28]  S. K. Das,et al.  Importance of quality AC power distribution and understanding of EMC standards IEC 61000-3-2, IEC 61000-3-3 and IEC 61000-3-11 , 2003, 8th International Conference on Electromagnetic Interference and Compatibility.

[29]  Bong-Hwan Kwon,et al.  An Efficient Power-Factor Correction Scheme for Plasma Display Panels , 2008, Journal of Display Technology.

[30]  Wang Xiao-yan,et al.  Difference of GB 1 7625.1-2003 《Electromagnetic Compatibility-Limits-Limits for Harmonic Current Emissions (Equipment Input Current Per Phase≤16A)》 , 2003 .

[31]  Fred C. Lee,et al.  Utilization of an active-clamp circuit to achieve soft switching in flyback converters , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[32]  Prasad N. Enjeti,et al.  Design of a wide input range DC-DC converter with a robust power control scheme suitable for fuel cell power conversion , 2004, Nineteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2004. APEC '04..

[33]  M.G. Egan,et al.  A Family of Single-Stage Resonant AC/DC Converters With PFC , 2009, IEEE Transactions on Power Electronics.

[34]  Jung-Min Kwon,et al.  Single-Stage Soft-Switching Converter With Boost Type of Active Clamp for Wide Input Voltage Ranges , 2009, IEEE Transactions on Power Electronics.

[35]  Gerry Moschopoulos,et al.  Single-phase single-stage power-factor-corrected converter topologies , 2005, IEEE Transactions on Industrial Electronics.

[36]  Jung-Min Kwon,et al.  Single-Stage Single-Switch PFC Flyback Converter Using a Synchronous Rectifier , 2008, IEEE Transactions on Industrial Electronics.

[37]  Alireza Khaligh,et al.  Modified Pulse-Adjustment Technique to Control DC/DC Converters Driving Variable Constant-Power Loads , 2008, IEEE Transactions on Industrial Electronics.