ST TLL006V1 User Manual

STEVAL-TLL006V1

High-power LED driver demonstration board for single flash with I2C interface based on the STCF06

Features

■Buck-boost DC-DC converter

■Drives one power LED up to:

–1.5 A between 3.5 V to 5.5 V

–1.3 A between 3.0 V to 5.5 V

–1 A between 2.7 V to 5.5 V

■Efficiency up to 85%

■LED current control

■1.8 MHz fixed frequency PWM

■Full I2C control

■Motherboard based on µPSD used as USB bridge

Data brief

STEVAL-TLL006V1

■ RoHS compliant

Description

This demonstration board implements a flash LED driver using the STCF06 device, which is a buck-boost current mode converter with an I2C interface.

The flash LED driver STCF06 has a high operating frequency (1.8 MHz) which allows the usage of small external components.

The demonstration board is designed for driving a single LED with a forward voltage range from 2.7 to 5 V.

For easy connection to a PC, the STEVALTLL006V1 uses a µPSD-based motherboard used as a bridge.

The STCF06 motherboard uses an USB human interface device to communicate with the PC. It is not necessary to install a driver, if the operating system in use is capable of enumerating USB human interface devices.

May 2009	Doc ID 15720 Rev 1	1/4
For further information contact your local STMicroelectronics sales office.		www.st.com

Circuit schematic	STEVAL-TLL006V1

1 Circuit schematic

Figure 1. Typical application schematic

2/4	Doc ID 15720 Rev 1