STCF02 Datasheet, PDF(1/4 Page) STMicroelectronics

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STCF02 Datasheet, PDF (1/4 Pages) STMicroelectronics – High Power White Led Driver

STCF02

Features

I Buck-boost DC/DC Converter

I Drives One Power White Led:

Up To 600mA Between 2.7 To 5.5V

I Led Temperature Protection

I Output Current Control

I 1.8 MHz Typ Fixed Frequency PWM

I Synchronous Rectification

I High Efficiency Across The Total Input Voltage

Range

I Operational Modes:

Shutdown Mode

Shutdown Mode With NTC

Flash Mode: Up To 600 mA

Medium Flash Mode

Torch Mode: Up To 250 mA

I Adjustable Current In All Three Modes

I Peak Inductor Limited To 2.3 A Typ.

I LED Disconnected From The Battery In

Shutdown Mode

I Programmable Safety Shutdown In Flash

Mode

I Over Voltage Protection 5.3V

I Short Circuit Protection

I Over Temperature Protection

I < 1ÂµA Shutdown Current

I QFN20 4 x 4 mm

Applications

I CELL PHONE AND SMART PHONES

I CAMERA FLASHES/STROBES

I PDAS AND DIGITAL STILL CAMERAS

Order Codes

High Power White Led Driver

Data Brief

QFN20

Description

The STCF02 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 the battery voltage

(particularly in the case, that the output voltage is

lower than the input voltage); the output current

control ensure a good current regulation over the

forward voltage spread characteristics of the

Flash LED.

Three logic input signal can select 5 modes of

operation: shutdown mode (quiescent current less

than 1ÂµA typ), shutdown mode with NTC active,

torch mode (Drive the led up to 250 mA), flash

mode (up to 600 mA) and medium flash mode that

reduce the flash current.

The high efficiency of the converter allows having

the input current taken from the battery lower than

1.5A and the peak inductor current is limited to 2.3

Amps typical. Other features include softstart

control, thermal shutdown, short circuit protection,

over voltage protection and LED temperature

protection. Alternatively to LED temperature

protection, a safety flash time out can be easily

implemented. The device is packaged in a QFN

20 leads with a dimension of 4x4 mm and a height

of less than 1mm.

Type

STCF02PMR

Package

QFN20 (4x4 mm)

October 2005

For further information contact your local STMicroelectronics sales office..

Comments

4500 parts per reel

Rev. 1

1/4

www.st.com

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