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STCF03 Datasheet

  • STCF03

  • High power white LED driver with I2C⑩ interface

  • 534.06KB

  • 35頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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STCF03
High power white LED driver with I
2
C鈩?interface
Features
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Buck-boost dc/dc converter
Drives one power white LED up to 800 mA from
2.7 V to 5.5 V in QFN
Drives one power white LED up to 800 mA from
3.3 V to 5.5 V in BGA
Efficient up to 92%
Output current control
1.8 MHz typ. fixed frequency PWM
Synchronous rectification
Full I
2
C control
Operational modes:
鈥?Shutdown mode
鈥?Shutdown + NTC
鈥?Ready mode + auxiliary red LED
鈥?Flash mode: up to 800 mA
鈥?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 碌A(chǔ) shutdown current
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QFN20 (4x4)
TFBGA25 (3x3)
Packages:
鈥?QFN20 (4x4)
鈥?TFBGA25 (3x3)
Applications
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Cell phone and smart phone
Camera flashes/strobe
PDAs and digital still cameras
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Description
The STCF03 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 ensure a good current regulation
over the forward voltage spread characteristics of
the Flash LED.
Thanks to the high efficiency of the converter
allows having the input current taken from the
battery remain under 1.5 A. (See continuous
description)
Table 1. Device summary
Order code
STCF03PNR
STCF03TBR
(1)
1. Available on request.
Package
QFN20 (4x4 mm)
TFBGA25 (3x3 mm)
Packaging
4500 parts per reel
3000 parts per reel
September 2007
Rev. 4
1/35
www.st.com
35

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