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Abstract
This paper presentsthe comparison of single switch and conventional continuous buck boost converter over proposed two switch buck boost converter for reduction of voltage stress across semiconductor devices and improvement of efficiency. In single switch converter voltage stress is high which is sum of input voltage and output voltage. Even though conventional TSBB converter reduces voltage stress, but increases the conducting losses. The proposed TSBB converterwhich have similar number of both active and passive components to conventional TSBB converter, decreases voltage stress and also there is decrease in conducting components losses .So efficiency of proposed TSBB converter is increased. The open loop proposed TSBB converter is made into closed loop control converter using PID controller of 48 V constant output voltages.Theproposed closed loop converter using PID controller enhances the dynamic stability performance of buck boost DC-DC converter. So that vigorous output voltage obtained against variations in the circuit components and changes in load disturbances.