AN3223 Datasheet, PDF (1/29 Pages) STMicroelectronics – Driver for double flash LED with I²C interface

AN3223
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 STCF04
device, which is a buck-boost converter with an I²C interface dedicated to charging a super-
capacitor. The schematic, functional description, recommendations for PCB layout, and
external component selection are also covered. This device is designed for driving four
LEDs. A detailed functional description can be found in Figure 1 below.
Figure 1.
Picture of the demonstration board and the external transistor with TDK
EDLC
AM05038v1
February 2012
Doc ID 17553 Rev 2
1/29
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