A voltage-mode boost DC-DC converter with a constant-duty-cycle pulse control

The conventional voltage-mode hysteretic buck converters have the merit of fast response and yet stable operation. However, such merits cannot be extended to its counterpart boost converters. This is so simply because the waveforms of the input current and output voltage of buck version are in-phase, but they are out-of-phase in the boost version. Due to the design simplicity, this study presents a voltage-mode boost converter design. With the simple structure, the proposed converter achieves a good power efficiency, ranged from 85% to 93.52% for the load currents from 50mA to 300mA, and fast transient response, 6 μs for the load currents which are switched from 100 mA to 300 mA and from 300 mA to 100 mA.

[1]  Stefano Gregori,et al.  Monolithic DC-DC boost converter with current-mode hysteretic control , 2011, 2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE).

[2]  H. P. Chou,et al.  An efficient fast response hysteresis buck converter with adaptive synthetic ripple modulator , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[3]  Wing-Hung Ki,et al.  Ultra Fast Fixed-Frequency Hysteretic Buck Converter With Maximum Charging Current Control and Adaptive Delay Compensation for DVS Applications , 2008, IEEE Journal of Solid-State Circuits.

[4]  Marcus Zimnik.  Comparison of PWM Voltage and Current Mode Control Schemes vs . Improved Hysteretic Mode Control in Switch Mode Power Supplies ( SMPS ) , 2001 .

[5]  Chin-Long Wey,et al.  A fast hysteretic buck converter with adaptive ripple controller , 2012, 2012 IEEE 55th International Midwest Symposium on Circuits and Systems (MWSCAS).

[6]  Jian Sun,et al.  Ripple-Based Control of Switching Regulators—An Overview , 2009, IEEE Transactions on Power Electronics.

[7]  N. Keskar,et al.  Self-stabilizing, integrated, hysteretic boost DC-DC converter , 2004, 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004.

[8]  Ke-Horng Chen,et al.  Modified Hysteretic Current Control (MHCC) for Improving Transient Response of Boost Converter , 2011, IEEE Transactions on Circuits and Systems I: Regular Papers.