Article citationsMore>>

Philips Lumileds Lighting Company, “Philips Lumileds LED Technology Breakthrough Fundamentally Solves Efficiency Losses at High Drive Currents,” Press Infor mation, Philips Lumileds Lighting Company, San Jose, 2007.

has been cited by the following article:

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

  AUTHORS: Jin He, Wing Yan Leung, Tsz Yin Man, Lin He, Hailang Liang, Aixi Zhang, Qingxing He, Caixia Du, Xiaomeng He, Mansun Chan

  KEYWORDS: LED Driver; Current Sensing; Capacitor Voltage; Feedback; Circuit

  JOURNAL NAME: Circuits and Systems, Vol.4 No.5, August 30, 2013

  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.