參數(shù)資料
型號(hào)： STCF02
廠(chǎng)商： 意法半導(dǎo)體
元件分類(lèi)： LED驅(qū)動(dòng)器
英文描述： High Power White Led Driver
中文描述： 大功率白光LED驅(qū)動(dòng)器
文件頁(yè)數(shù)： 1/4頁(yè)
文件大小： 223K
代理商： STCF02
Data Brief
October 2005
1/4
4
For further information contact your local STMicroelectronics sales office..
Rev. 1
STCF02
High Power White Led Driver
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
< 1μA 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
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
(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.
the
battery
voltage
Three logic input signal can select 5 modes of
operation: shutdown mode (quiescent current less
than 1μA 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.
QFN20
相關(guān)PDF資料
PDF描述
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