Abstract :This paper analyses the Interleaving technique applied to Boost DC-DC Converter. It is achieved by interconnection of multiple switching cells in series with diode and parallel with inductors, hence it will increase the effective pulse frequency by synchronizing several smaller sources and operating them with relative phase shift. Energy can be saved and power conversion can be increased without affecting conversion efficiency by interleaving technique. In this , two phases are used and three devices are connected per phase, three phases are used and two devices are connected per phase. The converters are tested at constant input voltage and variable duty cycle using simulation by Matlab/simulink. The ripple content of the output voltage and input current of the converter are obtained from design calculation and compared with simulated results

Introduction: With the increased need of renewable energy sources and energy storage, high-voltage-gain dc–dc power electronic converters used in green energy systems.The step-up converter provides low current ripple, high efficiency.

Methods & Results: The Multi device interleaved boost dc-dc converters are tested by simulation at duty cycle of 0.25 and 0.375 respectively . These duty cycles are selected based on the output voltage (Vo). Considering Vo is known. Fixed as 200V for both the converters

Conclusion: These Converters are analyzed, designed and simulated. Two Phase Three Device per phase boost dc-dc Converter provides 87.9 % of efficiency of power and provides ripple of 0.0106 % volts of output voltage .Three Phase Two Device per phase boost dc-dc Converter provides 92.8 % of efficiency of power provides ripple of 0.125 % volts of output voltage. By comparing these, Two phase Three Device Converters provides Low Output Voltage gain, Low efficiency of Power, Low Ripple Output Voltage and Three phase Two device Converter provides High Output Voltage gain, High efficiency of Power, High Ripple Output Voltage.