STCF07 Datasheet, PDF (1/26 Pages) STMicroelectronics – High power buck-boost white LED driver

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
QFN16 (4 x 4 mm)
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.
■ Camera flash for mobile phones
■ Power supply for high power LEDs
Table 1.
Device summary
Order code
Package
Packaging
STCF07PNR
QFN16 (4 x 4 mm)
Tape and reel
September 2012
This is information on a product in full production.
Doc ID 16757 Rev 3
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www.st.com
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