STCF02_07 datasheet(1/19 Pages) STMICROELECTRONICS

Nome de Peças	STCF02

Descrição Electrónicos	High power white led driver

PDF	19 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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1 / 19 page

February 2007

Rev. 6

1/19

19

STCF02

High power white led driver

General features

■ Buck-boost DC/DC Converter

■ Drives one power white led:

up to 600mA between 2.7 to 4.5V

■ Led temperature protection

■ Output current control

■ 1.8 MHz (typ) fixed frequency PWM

■ Synchronous rectification

■ High efficiency across the total input voltage

range

■ Operational modes:

- Shutdown mode

- Shutdown mode with NTC

- Flash mode up to 600 mA

- Medium flash mode

- Torch mode: up to 250 mA

■ Adjustable current in all three modes

■ LED disconnected from the battery in

shutdown mode

■ Programmable safety shutdown in flash mode

■ LED short and open circuit protection

■ Overvoltage protection

■ < 1µA Shutdown current

■ QFN20 4mm x 4 mm package

Applications

■ Cell phone and smart phones

■ Camera flashes/strobes

■ PDAS and digital still cameras

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 that guarantees a proper

LED current control over the battery voltage

(particularly in the case, when the output voltage

is lower than the input voltage); the output current

control ensures a good current regulation over the

forward voltage spread characteristics of the

Flash LED.

Three logic input signals can select 5 modes of

operation: Shutdown mode (quiescent current

less than 1µA typ), Shutdown mode with NTC

active, Torch mode (drives the LED up to 250mA),

Flash mode (up to 600mA), and Medium flash

mode (reduces the flash current).

This highly efficient converter is able to accept

input current from the battery (lower than 1.5A),

while limiting the peak inductor current to 2.3A

(typ). Other features include Soft start control,

thermal shutdown, short circuit protection,

overvoltage protection, and LED temperature

protection. An alternative to LED temperature

protection is that a safety flash time-out feature

can be implemented instead. This device is

available in a QFN20, 4mm x 4mm, no-lead

package (height is less than 1mm).

www.st.com

QFN20 (4mm x 4mm)

Order code

Part number

Package

Packaging

STCF02PNR

QFN20 (4x4 mm)

4500 parts per reel

Nº de peça semelhante - STCF02_07

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Descrição semelhante - STCF02_07

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STCF02 Folha de dados(PDF) 1 Page - STMicroelectronics

STCF02 Folha de dados(HTML) 1 Page - STMicroelectronics

Nº de peça semelhante - STCF02_07

Descrição semelhante - STCF02_07

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