AN2827 datasheet(1/30 Pages) STMICROELECTRONICS

Part #	AN2827

Description	Driver for double flash LED with I²C interface

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 30 page

June 2009

Doc ID 15047 Rev 1

1/30

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

www.st.com

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