Datasheet > STCF02_07

STCF02_07

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		驱动器
页数	文件大小	规格书
19页	703K
描述
High power white led driver

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STCF02_07 数据手册

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

QFN20 (4mm x 4mm)

Description

■ 1.8 MHz (typ) fixed frequency PWM

■ Synchronous rectification

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.

■ 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

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).

■ LED disconnected from the battery in

shutdown mode

■ Programmable safety shutdown in flash mode

■ LED short and open circuit protection

■ Overvoltage protection

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).

■ < 1µA Shutdown current

■ QFN20 4mm x 4 mm package

Applications

■ Cell phone and smart phones

■ Camera flashes/strobes

■ PDAS and digital still cameras

Order code

Part number

Package

QFN20 (4x4 mm)

Packaging

STCF02PNR

4500 parts per reel

February 2007

Rev. 6

1/19

www.st.com

12 3 4 5 6 7...19

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