STEVAL-ILD002V1

STEVAL-ILD002V1 20 W dimmable CFL ballast solution based on the L6574 Data Brief Features ■ Lamp base: E27 ■ Wattage: 20 W (3U T3 lamp) ■ Input line: 180 VAC - 264 VAC ■ Lumen output: 1300 lm ■ Dimming range: 20% - 100% ■ Energy label: Class A ■ Efficiency > 80% at wide range input ) s ( ct u d o r P e t e l o Description This demonstration board represents a 20 W dimmable CFL (compact fluorescent lamp) ballast solution which can completely replace incandescent lamps in dimming systems. The controlled dimming range is from below 20% up to 100% of full light output without changing the triac dimmer. s b O )- STEVAL-ILD002V1 s ( t c u d o Compared to formal CFL designs, this dimmable solution provides not only energy savings, but also higher reliability and significantly longer operating life. r P e t e l o The solution is based on the high performance ballast driver L6574, two STD4NK50Z power MOSFETs, a Zener-protected SuperMESH™ power MOSFET and two STTH1L06 Turbo 2 ultrafast high voltage rectifiers. s b O June 2008 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 2/4 4.7 mH 10 C10 GND R2 560 Ω 22 µF /25 V 5.1 KΩ D3 D4 1N4148 STTH1L06 C5 100 nF Db2 33 nF Cf2 C2 10 µF / 25 V 220 kΩ R8 100 KΩ D6 R5 C4 47 nF 10 kΩ R4 C3 100 nF R12 75 KΩ 10 10 10 KΩ R14 470 pF 150 nF C8 16 16 C9 1 1 L6574 12 12 68 KΩ 3 3 4 5 6 7 2 IC 68 Ω R7 R6 4 5 6 7 2 1N4148 D5 ZD1 1.5 V C6 8 9 8 9 11 11 14 14 15 15 22 Ω R11 22 Ω R10 680 pF / 630 V C7 100 nF ) (s s b O R1 470 KΩ R3 Lin D2 33 nF s b O d o r t c u Rin D1 Cf1 P e t e l o STH1L06 Cb STD4NK50z Lr STD4NK50z R9 2Ω Q2 1 2 Lamp AM00205 Cr 5.6 nF / 1200 V C1 10 µF / 450 V 3 4 100 nF / 400 V 2.8 mH Q1 Figure 1. 2.8 mH 1 Dbl L1 Schematic diagram STEVAL-ILD002V1 Schematic diagram Circuit schematic t e l o r P e u d o ) s ( ct STEVAL-ILD002V1 2 Revision history Revision history Table 1. Document revision history Date Revision 10-June-2008 1 Changes Initial release. ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O 3/4 STEVAL-ILD002V1 ) s ( ct Please Read Carefully: u d o 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. r P e 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. t e l o No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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