Circuits and Systems

Volume 4, Issue 5 (September 2013)

ISSN Print: 2153-1285   ISSN Online: 2153-1293

Google-based Impact Factor: 0.92  Citations  h5-index & Ranking

Design and Verification of a High Performance LED Driver with an Efficient Current Sensing Architecture

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DOI: 10.4236/cs.2013.45052    5,686 Downloads   8,323 Views  

ABSTRACT

A high power buck-boost switch-mode LED driver delivering a constant 350 mA with a power efficient current sensing scheme is presented in this paper. The LED current is extracted by differentiating the output capacitor voltage and maintained by a feedback. The circuit has been fabricated in a standard 0.35 μm AMS CMOS process. Measurement results demonstrated a power-conversion efficiency over 90% with a line regulation of 8%/V for input voltage of 3.3 V and current output between 200 mA and 350 mA.

Share and Cite:

J. He, W. Leung, T. Man, L. He, H. Liang, A. Zhang, Q. He, C. Du, X. He and M. Chan, "Design and Verification of a High Performance LED Driver with an Efficient Current Sensing Architecture," Circuits and Systems, Vol. 4 No. 5, 2013, pp. 393-400. doi: 10.4236/cs.2013.45052.

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