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A new non-isolated multi-output converter with four outputs from two switches

This paper presents a non-isolated multi-output converter with four outputs. Only two switches in a half-bridge configuration are required to generate the four outputs. More outputs are also possible without the need of any additional switch. A reference sine wave signal of a particular frequency is generated for each of the outputs. The amplitude of the sine wave is modulated based on supply and load variations. The sum of the various reference sine waves drives a half bridge converter. The square wave output from the half-bridge converter is passed through a low pass filter to minimize cross regulation between the outputs. It is then filtered using four tuned networks at the same chosen frequencies as the references and then rectified to obtain the required outputs. An analysis of the converter is done to show that control is possible by amplitude modulation of the reference sine waves. The design procedure for the resonant components is discussed and a comprehensive simulation of the converter is done for different loads and supply voltages. The results are in agreement with the expectations.