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)

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