STMicroelectronics STEVAL-TLL009V1 Camera flash based on the STCF07 STEVAL-TLL009V1 STEVAL-TLL009V1 Data Sheet

Product codes
STEVAL-TLL009V1
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This is information on a product in full production. 
September 2012
Doc ID 16757 Rev 3
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STCF07
High power buck-boost white LED driver
Datasheet 
 production data
Features
Buck-boost DC-DC converter
Drives one power LED up to 1 A in flash mode
Drives one power LED up to 800 mA in 
continuous mode
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
– High current mode: up to 1 A 
– Low current mode: from 20 mA
Adjustable current in both modes
Peak inductor limited to 2.3 A (typ.)
LED disconnected from the battery in 
shutdown mode 
NTC LED temperature protection
Overvoltage protection: 5.3 V
Short-circuit protection
Overtemperature protection
ULVLO function
1 µA max shutdown current
QFN16 (4 x 4 x 1 mm) 16 leads
Applications
Camera flash for mobile phones
Power supply for high power LEDs
         
Description
The STCF07 is a dedicated, size-optimized 
solution for driving a power LED. The device is a 
buck-boost converter which guarantees proper 
LED current control over all possible battery 
voltage and LED forward voltage conditions. The 
output current control ensures good current 
regulation over the forward voltage spread 
characteristics of high-brightness LEDs. The 
device includes various functions to protect the 
chip and the power LEDs. These include soft-start 
control as well as detection and protection of chip 
overtemperature and shorted LEDs. An optional 
external NTC is supported to protect the LEDs 
against overheating. It is possible to separately 
program the current intensity in HIGH and LOW 
mode using the SEL pin. The device is housed in 
a 16-lead QFN16 (4 x 4 mm) package with a 
height less than 1 mm.
QFN16 (4 x 4 mm)
Table 1.
Device summary
Order code
Package
Packaging
STCF07PNR
QFN16 (4 x 4 mm)
Tape and reel