STCF03I datasheet(1/33 Pages) STMICROELECTRONICS

Teilenummer	STCF03I

Bauteilbeschribung	High power white LED driver with I2CTM interface

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

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September 2007

Rev. 4

1/33

33

STCF03I

High power white LED driver with I2C™ interface

Features

■ Buck-boost DC/DC converter

■ Drives one power white led up to:

800 mA between 3.3 V to 5.5 V

600 mA between 2.7 V to 5.5 V

■ Efficiency up to 92%

■ Output current control

■ 1.8 MHz typ fixed frequency PWM

■ Synchronous rectification

■ Full I2C control

■ Operational modes:

Shutdown mode

■ Ready mode + auxiliary red led

Ready mode + NTC

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

■ Package (3x3 mm) TFBGA25

Applications

■ Cell phone and smart phones

■ Camera flashes/strobe

■ PDAs and digital still cameras

Description

The STCF03I 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 ensures a good current regulation

over the forward voltage spread characteristics of

the Flash LED.

Thanks to the high efficiency of the converter, the

input current taken from the battery remains

under 1.5 A. All the functions of the device are

controlled through the I2C bus which helps to

reduce logic pins on the package and to save

PCB tracks on the board. (See continuous

description)

TFBGA25 (3x3)

Table 1. Device summary

Order code

Package

Packaging

STCF03ITBR

TFBGA25 (3x3 mm)

3000 parts per reel

www.st.com

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