Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Slope Compensation Design of Buck AC/DC LED Driver Based on Discrete-Time Domain Analysis
Authors Marn-Go Kim
Page pp.207-214
ISSN 1229-2214
Keywords Power factor correction ; Buck AC/DC LED driver ; Slope compensation design ; Discrete time domain analysis ; Current mode control
Abstract In this study, discrete-time domain analysis is proposed to investigate the input current of a buck AC/DC light-emitting diode (LED) driver. The buck power factor correction converter can operate in both discontinuous conduction mode (DCM) and continuous conduction mode (CCM). Two discontinuous and two continuous conduction operating modes are possible depending on which event terminates the conduction of the main switch in a switching cycle. All four operating modes are considered in the discrete-time domain analysis. The peak current-mode control with slope compensation is used to design a low-cost AC/DC LED driver. A slope compensation design of the buck AC/DC LED driver is described on the basis of a discrete-time domain analysis. Experimental results are presented to confirm the usefulness of the proposed analysis.