STEVAL-TLL007V1 High-power LED driver demonstration board for dual flash with I

STEVAL-TLL007V1 High-power LED driver demonstration board for dual flash with I
STEVAL-TLL007V1
High-power LED driver demonstration board for dual flash
with I2C interface based on the STCF05
Data brief
Features
■
Boost DC-DC converter with synchronous
rectification
■
Drives two power white LEDs in series with a
current up to 400 mA
■
Efficiency up to 85%
■
3 passive components only
■
24 mm2 PCB area only
■
1.8 MHz fixed frequency PWM
■
Full I2C control
■
Motherboard based on µPSD used like USB
bridge
■
RoHS compliant
STEVAL-TLL007V1
Description
This demonstration board is dedicated to the
STCF05 flash LED driver IC, which is a boost
current mode converter with an I2C interface and
internal current source. The STCF05 is designed
to drive two LEDs in series with a total forward
voltage from 5.3 V to 10.2 V.
For easy connection to a PC, the STEVALTLL007V1 uses a µPSD-based motherboard
used as a bridge.
The STCF05 motherboard uses a 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.
January 2010
Doc ID 15721 Rev 2
For further information contact your local STMicroelectronics sales office.
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www.st.com
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Circuit schematic
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Circuit schematic
Figure 1.
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STEVAL-TLL007V1
Typical application schematic
Doc ID 15721 Rev 2
STEVAL-TLL007V1
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Revision history
Revision history
Table 1.
Document revision history
Date
Revision
Changes
15-May-2009
1
Initial release.
12-Jan-2010
2
Minor text changes.
Doc ID 15721 Rev 2
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STEVAL-TLL007V1
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