stcf04tbr STMicroelectronics, stcf04tbr Datasheet

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stcf04tbr

Manufacturer Part Number
stcf04tbr
Description
High Power White Led Supercap Driver With I?c Interface
Manufacturer
STMicroelectronics
Datasheet

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Part Number
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Part Number:
STCF04TBR
Manufacturer:
STMicroelectronics
Quantity:
10 000
Features
Table 1. Device summary
March 2009
For further information contact your local STMicroelectronics sales office.
1.8 MHz buck-boost converter with 1.2 A peak
current limiting and synchronous rectification
Programmable current limit
Burst mode operation when output is charged
Selectable 200 mA / 400 mA SuperCap
charging current
Input voltage range 2.7 V to 5.5 V
Programmable output charging voltage up to
5.5 V
Full I²C control
Operation modes:
– Shutdown mode
– Monitoring mode with NTC and SuperCap
– Idle mode
– Flash mode
– Torch mode: up to 300 mA
Controlled LED current in all modes
Soft and hard triggering of flash, torch and
picture light modes
Torch dimming in 12 exponential steps
Flash dimming in 8 steps
Torch mode safety time-out
Active balancing of SuperCap voltage
SuperCap status flag
Internally or externally timed flash operation
Digitally programmable safety time-out in flash
mode
LED overtemperature detection and protection
with external NTC resistor
Shorted LED failure detection and protection
Chip overtemperature detection and protection
monitoring
STCF04TBR
Order code
High power white LED SuperCap driver with I²C interface
TFBGA25 (3 x 3 mm.)
Package
Rev 1
Applications
Description
The STCF04 is a dedicated and space optimized
high efficiency solution for driving a flash LED
module in camera phones, PDAs and other hand-
held devices using the SuperCap technology. It is
based on a DC-DC buck-boost converter, which
ensures proper and efficient charging control and
monitoring of the SuperCap within the entire
battery voltage range. The output current control
ensures good current regulation over the forward
voltage spread characteristics of the flash LEDs in
torch and flash mode operation. The SuperCap
charging current is programmed to a defined
value which avoids overload of the battery. The
SuperCap discharge current flows through the
LEDs and the external MOSFET which must be
chosen according to the desired flash current.
See
Cell phones and smartphones
Camera flash/strobe
PDAs and digital still cameras
Description
TFBGA25 (3 x 3 mm.)
(continued).
3000 parts per reel
Packaging
STCF04
www.st.com
Data brief
1/7
7

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stcf04tbr Summary of contents

Page 1

... NTC resistor ■ Shorted LED failure detection and protection ■ Chip overtemperature detection and protection Table 1. Device summary Order code STCF04TBR March 2009 For further information contact your local STMicroelectronics sales office. TFBGA25 ( mm.) Applications ■ Cell phones and smartphones ■ ...

Page 2

Description (continued) All the functions of the device are controlled through the I²C bus which reduces the number of logic pins of the package and saves PCB tracks on the application board. Hard and soft- triggering of flash and ...

Page 3

Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at ...

Page 4

TFBGA25 mechanical data Dim. Min 0.78 b 0. 4/7 mm. Typ. Max. Min. 1.1 1.16 39.4 0.25 0.86 30.7 0.30 0.35 9.8 3.0 3.1 114.2 2 3.0 3.1 ...

Page 5

Tape & reel TFBGA25 mechanical data Dim. Min 12 3.9 P 7.9 5/7 mm. Typ. Max. Min. 330 13.2 0.504 0.795 2.362 14.4 3.3 3.3 1.60 4.1 0.153 8.1 ...

Page 6

Revision history Table 2. Document revision history Date Revision 24-Mar-2009 1 6/7 Changes Initial release. ...

Page 7

... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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