Single-Stage AC-DC Integrated Double Buck-Boost LED Driver

The proposed converter is equivalent to the cascade connection of buck-boost converters, by using a single controlled switch between two stages. It is able to supply a lamp with good efficiency, high power factor and less %THD. In this paper, linear peak current mode control (LPCMC) technique is presented which is a simplified power factor correction technique for single-stage AC to DC converters, the advantages of this circuit include no multiplies are required and voltage sensing circuits. The implementation of this controller is made easy by the use of standard PWM control IC’s. From the AC mains, the IDBB converter will power the LED lamps which provides low ripple current through LED, less total harmonic distortion and high power factor.