STCF03 datasheet(1/35 Pages) STMICROELECTRONICS

No de pièce	STCF03

Description	High power white LED driver with I2C??interface

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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1 / 35 page

September 2007

Rev. 4

1/35

35

STCF03

High power white LED driver with I2C™ interface

Features

■ Buck-boost dc/dc converter

■ Drives one power white LED up to 800 mA from

2.7 V to 5.5 V in QFN

■ Drives one power white LED up to 800 mA from

3.3 V to 5.5 V in BGA

■ Efficient up to 92%

■ Output current control

■ 1.8 MHz typ. fixed frequency PWM

■ Synchronous rectification

■ Full I2C control

■ Operational modes:

– Shutdown mode

– Shutdown + NTC

– Ready mode + auxiliary red LED

– Flash mode: up to 800 mA

– Torch mode: up to 200 mA

■ Soft and hard triggering of flash

■ Flash and torch dimming with 16 exponential

values

■ Dimmable red LED indicator auxiliary output

■ Internally or externally timed flash operation

■ Digitally programmable safety time-out in flash

mode

■ LED overtemperature detection and protection

with external NTC resistor

■ Opened and shorted led failure detection and

protection

■ Chip over temperature detection and protection

■ < 1 µA shutdown current

■ Packages:

– QFN20 (4x4)

– TFBGA25 (3x3)

Applications

■ Cell phone and smart phone

■ Camera flashes/strobe

■ PDAs and digital still cameras

Description

The STCF03 is a high efficiency power supply

solution to drive a single flash LED in camera

phone, PDAs and other hand-held devices. It is a

buck - boost converter to guarantee a proper LED

current control over all possible conditions of

battery voltage and output voltage; the output

current control ensure a good current regulation

over the forward voltage spread characteristics of

the Flash LED.

Thanks to the high efficiency of the converter

allows having the input current taken from the

battery remain under 1.5 A. (See continuous

description)

TFBGA25 (3x3)

QFN20 (4x4)

Table 1. Device summary

Order code

Package

Packaging

STCF03PNR

QFN20 (4x4 mm)

4500 parts per reel

STCF03TBR (1)

TFBGA25 (3x3 mm)

3000 parts per reel

1.

Available on request.

www.st.com

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