STEVAL-ILL026V1 3 W non-isolated offline LED driver Features

STEVAL-ILL026V1
3 W non-isolated offline LED driver
demonstration board based on the VIPer22A-E
Data brief
Features
■
Input voltage: 90 to 265 VRMS
■
Provides 350 mA constant current for LEDs
■
Capable of driving 3 x 1 W LEDs in series with
high-precision constant current (± 5%
tolerance)
■
Overtemperature protection
■
LED open circuit protection
■
LED short-circuit protection
■
230 VAC input version with no electrolytic
capacitor
■
EN55015 & EN6100-3-2 compliant
■
RoHS compliant
STEVAL-ILL026V1
Description
The progress made in the field of LEDs is visible
on an almost day-by-day basis. Many high power
LEDs are currently on the market, such as 0.7 A
and 1 A devices. However, the most commonly
used LEDs are those with a current of 0.350 A.
This demonstration board is designed for 350 mA
LEDs and is capable of driving three 1 W LEDs in
series with high-precision constant current (± 5%
tolerance). The design is based on the VIPer22AE, which combines a dedicated current mode
PWM controller with a high voltage power
MOSFET on the same silicon chip.
The internal control circuit offers a large input
voltage range on the VDD pin, accommodates
changes in auxiliary supply voltage, and supports
automatic burst mode in low load conditions. The
board also features protections against
overtemperature, overcurrent and overvoltage
conditions.
December 2009
Doc ID 16766 Rev 2
For further information contact your local STMicroelectronics sales office.
1/4
www.st.com
4
CON2
2
1
J1
4 -
R7 10-1W_10%
1
2
BRIDGE
+3
D3
C8
330nF400VDC
C7
330nF400VDC/470nF400VDC
1mH-100mA
1mH-100
L1
1
2.2uF450v
+ C3
FB
FB
6
5
7
8
330nF16V
C4
SOURCE
DRAIN
V IP E R 2 2
CONTROL
Vdd
4
2/4
3
FB
1
2
39V500mW D1
R5 1R5_1/4_1%
C6
330nF16V
D4
STTH1R06
R4
10K1/4
4k71/4
R1
1mH
L2
Q2
BC547A
10K1/4
R3
Doc ID 16766 Rev 2
22uF50V
C5
Q1
BC557A
R6
6K81/4
R2
4K71/4
J2
1
2
CON2
D2
STTH1R
R06
Figure 1.
1
2
1
C1
22uF50V
Vdd
Schematic diagram
STEVAL-ILL026V1
Schematic diagram
STEVAL-ILL026V1 schematic diagram
AM05447v1
STEVAL-ILL026V1
2
Revision history
Revision history
Table 1.
Document revision history
Date
Revision
Changes
11-Nov-2009
1
Initial release.
04-Dec-2009
2
Updated title in Figure 1: STEVAL-ILL026V1 schematic diagram.
Doc ID 16766 Rev 2
3/4
STEVAL-ILL026V1
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.
© 2009 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
4/4
Doc ID 16766 Rev 2