**6. References**

164 MATLAB – A Fundamental Tool for Scientific Computing and Engineering Applications – Volume 1

**Figure 28.** Buck-Boost Converter Synchronous and Asynchronous Efficiency

This chapter gave a general overview of AC and DC converters with special emphases on DC-DC converters and their applications. The different topologies were discussed and the importance of designing for efficiency and energy saving was emphasized. Design and analysis steps were illustrated using Matlab and Simulink as an engineering tool. The effectiveness of the SimPower toolbox was demonstrated via typical examples which lead the way for further investigation. The tools available for simulation were exploited to

<sup>10</sup> <sup>50</sup> <sup>100</sup> <sup>500</sup> <sup>1000</sup> 0.5

10kHz Asynchronous 10kHz Synchronous 50kHz Asynchronous 50kHz Synchronous 100kHz Asynchronous 100kHz Synchronous

Load Current (mA)

**5. Conclusion** 

0.55

0.6

0.65

0.7

0.75

Efficiency

0.8

0.85

0.9

0.95

1

**Author details** 

Sven Fagerstrom

Nagy Bengiamin

facilitate additional related studies.

*Pacific Gas and Electric (PG&E), Fresno, CA, USA* 

*California State University Fresno, Fresno, CA, USA* 

	- Wang, T.G., Zhou, X., & Lee, F.C., (1997), *A Low Voltage High Efficiency and High Power Density DC/DC Converter*, 28th Annual IEEE Power Electronics Specialists Conference, Vol. 1, pp. 240-245.
	- Xiong, Y., Sun, S., Jia, H., Shea, P., & Shen, Z.J., (2009), *New Physical Insights on Power MOSFET Switching Losses*, IEEE Transactions on Power Electronics, Vol. 24, No. 2
	- Zhou, S., (2003). *Fully Integrated Power-Saving Solutions for DC-DC Converters Targeted for the Mobile, Battery-Powered Applications*, Georgia Tech Analog Consortium Industry Research Review
	- Zhou, S. & Rincon-Mora, G.A., (2006),*A high Efficiency, Soft Switching DC-DC Converter with Adaptive Current-Ripple Control for Portable Applications*, IEEE Transactions on Circuits and Systems, Vol.53, No. 4
