A DC-DC Step Down Converter for Unprecedented Higher Efficiency

摘要

A DC-DC step down converter is an encyclopedic DC-DC converter that adroitly converts a high voltage to a low voltage aptly. Adequate power conversion prolongs battery life, curtails heat and acquiesces for smaller gadgets to be fabricated. An unprecedented higher efficiency DC-DC step down converter using MOSFET switch, two inductors and switched capacitor is proposed. The use of DC-DC buck converter for high step down DC-DC conversion is very limited due to its narrow duty cycle. Proposed converter subsists of two inductors in lieu of single inductor, which used in conventional DC-DC step down converter, to get higher efficiency in attaining same low voltage gain. It transfers energy from DC source to load resistor using one inductor and capacitor whilst another inductor is used to step down the voltage and also get higher efficiency than conventional DC-DC step down converter. The circuit operation depends on the conduction state of the MOSFET. In case of on state condition, two inductors are in parallel and off state condition those are in series connection, so particular inductors charged the output capacitor to get surpassing efficiency and also make comparison between proposed and conventional buck converter. The steady state operation of the proposed circuit is ascertained by simulation results.