High-power LED driver demonstration board for single flash
with I
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
bridge
2
C control
■ Full I
■ Motherboard based on µPSD used as USB
■ RoHS compliant
STEVAL-TLL006V1
2
C interface based on the STCF06
Data brief
STEVAL-TLL006V1
Description
This demonstration board implements a flash
LED driver using the STCF06 device, which is a
buck-boost current mode converter with an I
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.
2
C
May 2009 Doc ID 15720 Rev 1 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Circuit schematic STEVAL-TLL006V1
1 Circuit schematic
Figure 1. Typical application schematic
2/4 Doc ID 15720 Rev 1
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