@article{guo_yang_huang_endredy_2010, title={A High Efficiency Regulated Charge Pump over Wide Input and Load Range}, ISSN={["1048-2334"]}, DOI={10.1109/apec.2010.5433355}, abstractNote={A multi-modes regulated charge pump with improved efficiency over wide input and load range is proposed in this paper. The output voltage is regulated to 5V when input is 4.5–2.7V. By alternating the switch network, it can realize 2x, 1.5x, and 1.33x conversion modes, which improves the efficiency over wide input range. During each mode, the output voltage is regulated by a controlled current source. The regulated charge pump is designed for a very wide load range (10mA to 500mA). A hybrid control scheme is proposed and analyzed to achieve a high efficiency over desired load range. Both of the simulation and test results are provided to verify the control scheme. The results show that the total loss at light load can be reduced by 56% to 83%.}, journal={2010 TWENTY-FIFTH ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC)}, author={Guo, Rong and Yang, Liyu and Huang, Alex and Endredy, John}, year={2010}, pages={1172–1176} }
 @inproceedings{yang_park_huang_2010, title={An adaptive external ramp control of the peak current controlled buck converters for high control bandwidth and wide operation range}, booktitle={Annual ieee conference on applied power electronics conference and}, author={Yang, L. Y. and Park, J. and Huang, A. Q.}, year={2010}, pages={2181–2188} }
 @inproceedings{fan_zhou_yang_huang_2009, title={A low power high noise immunity boost DC-DC converter using the differential difference amplifiers}, DOI={10.1145/1594233.1594249}, abstractNote={A new boost converter using the differential difference amplifiers (DDAs) in the control loop is proposed. Compared with the traditional current mode boost converters, the circuitry of this controller is much simpler and consumes less power by eliminating the loop compensation, current sensing, and slope compensation circuits. A large duty ripple voltage generated by an Rr-Cr network is compared with the DDAs' outputs to get the duty cycles and changes the boost converter from a second order to a first order system. The large noise margin of the duty ripple voltage also gives this control excellent noise immunity performance.}, booktitle={ISLPED 09}, author={Fan, J. W. and Zhou, X. and Yang, L. Y. and Huang, A.}, year={2009}, pages={63–68} }
 @inproceedings{yang_fan_huang_2009, title={Controller design issues and solutions for buck converters with phase shedding and AVP functions}, DOI={10.1109/ecce.2009.5316266}, abstractNote={For buck converters with high output current, multi-phase interleaving is popular. To improve light load efficiency, some phases can be shut down at light load. This is called phase shedding. Adaptive Voltage Positioning (AVP) is normally another requirement for high output current buck. Previous papers provided AVP design guidelines for buck converters without phase shedding. With phase shedding, are these design guidelines still valid? How to design the controller so that the output transient response doesn't get worse? This paper points out the controller design issues for buck converters with phase shedding and AVP. It is shown that the output will have worse transient response if the controller is designed in the same way as without phase shedding. New design guidelines are developed in this paper to solve the problem, which are verified by simulation and experimental results.}, booktitle={2009 IEEE Energy Conversion Congress and Exposition, Vols 1-6}, author={Yang, L. Y. and Fan, J. W. and Huang, A. Q.}, year={2009}, pages={2335–2341} }
 @article{yang_odendaal_2007, title={Measurement-based method to characterize parasitic parameters of the integrated power electronics modules}, volume={22}, ISSN={["1941-0107"]}, DOI={10.1109/TPEL.2006.886615}, abstractNote={A measurement-based method for extracting the parasitic parameters of active power electronics modules (IPEMs) is proposed. Parasitic inductances and capacitances inside the IPEM can all be extracted using this method without destroying the structure. The linearized model is derived from impedance measurement and it is valid from low frequency to frequencies as high as 100 MHz. Extracted parameters are compared to those from commercial software and the results are in good agreement. A parallel resonance method is proposed for the characterization of common-mode capacitances}, number={1}, journal={IEEE TRANSACTIONS ON POWER ELECTRONICS}, author={Yang, Liyu and Odendaal, Willem G. Hardus}, year={2007}, month={Jan}, pages={54–62} }