In this paper an approach of a step-up/down dc-dc converter with wide range conversion called Boost2-Buck is presented. The proposed converter presents nonpulsating input and output current. It has operations equivalent to a cascade converter consisting of two boost converter and one buck converter, but with the advantage of using single active switch. Mathematical analysis and experimental results are presented for converter operating with output power of 20W.

1. ELECTRICAL PROJECTS USING MATLAB/SIMULINK
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A Non-Insulated Step-Up/Down DC-DC Converter
With Wide Range Conversion
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ABSTRACT:
In this paper an approach of a step-up/down dc-dc converter with wide range conversion called
Boost
2
-Buck is presented. The proposed converter presents nonpulsating input and output
current. It has operations equivalent to a cascade converter consisting of two boost converter and
one buck converter, but with the advantage of using single active switch. Mathematical analysis
and experimental results are presented for converter operating with output power of 20W.
SOFTWARE: MATLAB/SIMULINK
CIRCUIT DIAGRAM:
Figure 1. Schematic boost
2
-buck.

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SIMULATION RESULTS:
Figure 2. Waveforms for Vi=180V (Bottom: Voltage on capacitor Figure 3. Waveforms for Vi=180V (Bottom: Voltage on capacitor
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C
1
– 100V/Div; Top: Voltage V
DS
on Switch S – 100V/Div). C
2
– 100V/Div; Top: Voltage V
DS
on Switch S – 100V/Div).
Figure 4. Waveforms for Vi=180V (Bottom: Voltage on capacitor Figure 5. Efficiency of the boost
2
-buck Converter
C
3
– 50V/Div; Top: Voltage V
DS
on Switch S – 100V/Div).

3. ELECTRICAL PROJECTS USING MATLAB/SIMULINK
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0-9347143789/9949240245
For Simulation Results of the project Contact Us
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0-9347143789/9949240245
CONCLUSION:
The boost
2
-buck converter presented in this paper provides a wide range of dc conversion when
compared with the conventional non-insulated dc-dc converters. This topology presents non
pulsating input and output current. It has operations equivalent to a cascade converter consisting
of two boost converter and one buck converter, but with the advantage of using single active
switch. Consequently, when compared with a converter cascade, it is cheaper, less bulky and
uses circuit control simpler. Through the experimental results is possible to prove the
performance of the converter as well as the theoretical analysis presented.
REFERENCES:
[1] J. A. Morales-Saldaña, J. Leyva-Ramos, E. E. Carbajal-Gutiérrez, M. G. Ortiz-Lopez, “Average
Current-Mode Control Scheme for a Quadratic Buck Converter with a Single Switch,” IEEE Trans. on
Power Electronics, vol. 23, pp. 485–490, Jan. 2008.
[2] J. R. de Britto, A. E. Demian Jr., E. A. A. Coelho, L. C. de Freitas, V. J. Farias, J. B. Vieira Jr., “A
Proposal of Led Lamp Driver for Universal Input Using Cuk Converter,” IEEE 39th Power Electronics
Specialists Conference, Rhoedes, 2008.
[3] J. R. de Britto, A. E. Demian Jr., E. A. A. Coelho, L. C. de Freitas, V. J. Farias, J. B. Vieira Jr., “LED
Lamp Driver Using a Converter with Wide Range Conversion Microcontroller-Based,” 34th Annual
Conference of the IEEE Industrial Electronics Society (Accepted), Orlando, 2008.
[4] J. A. Morales-Saldaña, J. Leyva-Ramos, E. E. Carbajal-Gutiérrez, “Modeling of Switch-Mode DC-DC
Cascade Converters,” IEEE Trans. on Aerospace and Electronic Systems, vol. 38, pp. 295–299, Jan.
2002.