AN2827 Datasheet, PDF (1/30 Pages) STMicroelectronics – Driver for double flash LED with I²C interface

AN2827
Application note
Driver for double flash LED with I²C interface
Introduction
This application note is dedicated to the design of a flash LED driver using the STCF05
device, which is a boost current mode converter with an I²C interface and internal current
source. The schematic, functional description, recommendations for PCB layout and
external components selection are also discussed in this application note. The STCF05
device is designed to drive two LEDs in series with a total forward voltage from 5.3 V to
10.2 V.
Figure 1. Demonstration board STCF05 v3: optimized for smallest PCB area
(24 mm²)
Figure 2. Demonstration board STCF05 v2: optimized for best efficiency
June 2009
Doc ID 15047 Rev 1
1/30
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