STCF06TBR datasheet(1/33 Pages) STMICROELECTRONICS

Il numero della parte	STCF06TBR

Spiegazioni elettronici	1.5 A white LED driver with I²C interface

PDF	33 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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1 / 33 page

May 2008

Rev 2

1/33

33

STCF06

1.5 A white LED driver with I²C interface

Features

■ Buck-boost DC-DC converter

■ Drives one power LED up to:

– 1.5 A between 3.5 V to 5.5 V

– 1.3 A between 3.0 V to 5.5 V

– 1 A between 2.7 V to 5.5 V

■ Efficiency up to 80%

■ Output current control

■ 1.8 MHz fixed frequency PWM

■ Full I²C control

■ Operational modes:

– Shutdown mode

– Ready mode + auxiliary red LED

– Ready mode + NTC

– Flash mode: up to 1.5 A

– Torch mode: up to 370 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 over temperature detection and protection

with external NTC resistor

■ Open and shorted LED failure detection and

protection

■ Chip over temperature detection and protection

■ < 1 µA shutdown current

■ Package 3x3 mm TFBGA25

Applications

■ Cell phones and smart phones

■ Camera flashes/strobe

■ PDAs and digital still cameras

Description

The STCF06 is a high efficiency power supply

solution to drive a single flash LED in camera

phones, PDAs and other battery powered

devices. It is a buck-boost converter able to

guarantee a proper LED current control over all

possible conditions of battery voltage and LED

forward voltage. The output current control

ensures a good current regulation over the

forward voltage spread characteristics of the flash

LED.

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. Hard and soft-triggering of flash are

both supported. The device includes many

functions to protect the chip and the power LED,

such as: soft start control, chip over temperature,

open and shorted LED detection and protection.

TFBGA25 (3x3)

Table 1. Device summary

Order code

Package

Packaging

STCF06TBR

TFBGA25 (3x3 mm)

3500 parts per reel

www.st.com

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