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This paper presents design and control of dual-switch non-invertingbuck-boost converter (CBB). This converter is designed to simplify thecompatibility of electronic ballast with simple and low cost LED drivers. Theconverter provides starting voltage and current limitation of electronicballasts, which operates at continuous conduction mode (CCM). The voltage ofload terminal is controlled by adjusting the duty cycle of the PWM regulator.Although both converter switches are controlled separately, one feedbackcontrol loop is needed to obtain the desired compensator level. Appropriatecontrol requirements have been defined by analyzing open-loop characteristic ofconverter transfer function through the small-signal model of CBB, which letsdecide about the control strategy and analyse the stability and performance ofthe closed loop control system. In order to obtain the desired output voltage,Type-III rational controller is preferred because of the non-minimum phasefeature in the converter boost mode. The performance of the synthesized voltagecontroller is verified by comparing of the pre-determined performancerequirements and the obtained simulation results.

Design of Non-Inverting Buck-Boost Converter for Electronic Ballast Compatible with LED Drivers