High-power LED driver demonstration board for dual flash
with I
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 mm
■ 1.8 MHz fixed frequency PWM
■ Full I
■ Motherboard based on µPSD used like USB
bridge
■ RoHS compliant
2
PCB area only
2
C control
STEVAL-TLL007V1
2
C interface based on the STCF05
Data brief
STEVAL-TLL007V1
Description
This demonstration board is dedicated to the
STCF05 flash LED driver IC, which is a boost
current mode converter with an I
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.
2
C interface and
January 2010 Doc ID 15721 Rev 2 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Circuit schematic STEVAL-TLL007V1
1 Circuit schematic
Figure 1. Typical application schematic
2/4 Doc ID 15721 Rev 2
STEVAL-TLL007V1 Revision history
2 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 3/4
STEVAL-TLL007V1
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
All ST products are sold pursuant to ST’s terms and conditions of sale.
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT
RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING
APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY,
DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE
GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK.
Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2010 STMicroelectronics - All rights reserved
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -
STMicroelectronics group of companies
Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
4/4 Doc ID 15721 Rev 2
Loading...