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STEVAL-ILL017V1 Offline constant current LED driver based on the VIPer17 Data Brief Features ■ Input voltage 220 VAC +/- 20% ■ 800 V avalanche rugged power section ■ Provides 500 mA constant current for LED ■ High precision constant current with +/- 5% tolerance (1 sense resistor and 2 resistor bridges with +/- 1% precision) ■ Overtemperature protection ■ LED open-circuit protection ■ LED short-circuit protection ■ PWM operation with frequency jittering for low EMI ■ Operating frequency: – 60 kHz for L type – 115 kHz for H type ■ Standby power < 50 mW at 265 VAC ■ Adjustable and accurate overvoltage protection ■ On-board soft-start ■ Safe auto-restart after a fault condition STEVAL-ILL017V1 VDC source, suitable for illuminating two LEDs in series. The VIPer17 device is an offline converter with an 800 V rugged power section, a PWM control, overcurrent protection, overvoltage and overload protection, hysteretic thermal protection, soft-start and safe auto-restart after the removal of a fault condition. The brown-out protection function is embedded into the high voltage start-up. Applications ■ Adapters for PDAs, camcorders, electric shavers, cellular phones, videogames ■ Auxiliary power supply for LCD/PDP TVs, monitors, audio systems, computers, industrial applications ■ SMPS for set-top boxes, DVD players/ recorders, white goods Burst mode operation and the very low consumption of the device combine to meet standby energy saving regulations. Advanced frequency jittering reduces EMI filter cost. Description The STEVAL-ILL017V1 demonstration board is a 2 W non-isolated offline constant current LED driver based on the VIPer17. The board operates with an input ranging from 176 V to 264 VAC and provides 500 mA of constant current from a 7 September 2008 Rev 1 For further information contact your local STMicroelectronics sales office. www.BDTIC.com/ST 1/4 www.st.com 4 1 2 AC In P1 GND GN 1 3 4 VPOS 2 C1 C12 10u 10uF 1mH L2 C1 1n 1nF C3 2.2u 2.2uF VP Con Cont FB Drain Drai Drain Drai Vd Vdd BR Source Sourc R1 R13 2.7K 2.7 C4 C6 56nF 56n 2.2n 2.2nF 2 3 U1 ER17 VI PER1 C1 C11 2.2u 2.2uF R4 56 56K R1 240 240K D3 BAT46 BAT4 1 D1 Bridg dge C2 100n 100nF 2 VNeu VNe 4 use VL _Fus 8 7 6 5 1 Fuse use 250V Q1 BC817 BC817-40 GND GN R1 R14 1M 10 5 1 6 7 nsformer Transfor 3 T1 8 100K 100 R3 R6 STTH1R06A STTH1R06 C5 10u 10uF D5 rain Drain R5 10K 10 C8 100n 100nF STPS2H100A S2H100 ST D6 C7 12n 12nF 8 82 82K R7 GND GN C1 C13 1u 1uF Out1 Vcc+ Vcc Out2 7 1 C9 220u 220uF 6.8 6.8K R2 U2 TSM103W Vcc ccInv1 Nonin Noninv1 4 3K R8 Nonin Inv2 Noninv2 6 2 C10 C1 R1 R10 3.3 3.3K 470pF 470p 1.2 R1 R11 24 24K R12 R1 1.2 R9 LED ED Ou Out 1 2 P2 Figure 1. 5 1 3 Fuse1 e1 Circuit schematic STEVAL-ILL017V1 Circuit schematic Schematic diagram 2/4 www.BDTIC.com/ST VLine STEVAL-ILL017V1 2 Revision history Revision history Table 1. Document revision history Date Revision 01-Sep-2008 1 Changes Initial release. 3/4 www.BDTIC.com/ST STEVAL-ILL017V1 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. 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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. © 2008 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 - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 4/4 www.BDTIC.com/ST