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STCF02PMR
High Power White Led Driver
Data BriefOctober 2005 1/4
Rev. 1
STCF02High Power White Led Driver
Features Buck-boost DC/DC Converter Drives One Power White Led:
Up To 600mA Between 2.7 To 5.5V 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 Peak Inductor Limited To 2.3 A Typ. LED Disconnected From The Battery In
Shutdown Mode Programmable Safety Shutdown In Flash
Mode Over Voltage Protection 5.3V Short Circuit Protection Over Temperature Protection < 1µA Shutdown Current QFN20 4 x 4 mm
Applications CELL PHONE AND SMART PHONES CAMERA FLASHES/STROBES PDAS AND DIGITAL STILL CAMERAS
DescriptionThe 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 the battery voltage
(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.
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.
Order Codes
STCF02 1 Revision History
3/4
1 Revision History
1 Revision History
STCF024/4
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