• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2013, Volume: 6, Issue: Supplementary 6, Pages: 1-7

Original Article

A Two Stage DC-DC Converter with Isolation for Renewable Energy Applications


In this work, the design and development of a DC-DC Converter using a two stage buck–boost operation is discussed. This converter is suitable for low power application such as a matrix LED lighting system. The advantage of this converter is that instead of using two controlled switches as in case of a conventional converter, this circuit uses one MOSFET as a switch. The circuit uses two inductors and two capacitors as energy transferring elements that are able to provide a good quality, high efficiency power supply to the load. The design of TSBB converter is analyzed with closed loop control using a PI controller circuit. Even with smaller values of inductor and capacitor a highly efficient power supply can be made. The main feature of this circuit compared to the other circuits proposed previously is that have a galvanic isolation between the load and the source is provided. Thus, by a suitable controller and galvanic isolation, the ripple magnitude in the output is reduced considerably. A simulation model of the TSBB converter with results is presented.
Keywords: Two Stage Buck–boost (TSBB), LED Matrix, Duty Cycle (α), Galvanic Isolation, Discontinuous Conduction Mode (DCM), Continuous Conduction Mode (CCM)


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