STEVAL-ILL084V1

STEVAL-ILL084V1 0.5 A, floating boost LED driver board based on the LED6000 Data brief Description The STEVAL-ILL084V1 product evaluation board is based on the LED6000 monolithic current source for high power LED driving. The floating boost topology can benefit from the LED6000 wide input voltage range to drive many power LED in series. The LED6000 is a 61 V asynchronous switching regulator with embedded power MOSFET, designed to supply up to 3 A DC currents depending on the application conditions. The 250 mV typical RSENSE voltage drop, embedded switch-over feature on the VBIAS pin and light load management (pulse skipping) maximize power conversion efficiency across the entire load range. Digital dimming is implemented by driving the dedicated DIM pin. Features          18 V to 36 V input voltage Step-up conversion (up to 15 LEDs) 0.5 A programmed LED current 500 kHz switching frequency Digital dimming Compliant with ceramic output capacitors 180° out-of-phase synchronization available Auto recovery overcurrent and thermal protection RoHS compliant January 2016 The current limit threshold and the switching frequency are adjustable for application optimization. The device includes an internal 250 kHz oscillator that can be externally adjusted up to 1.5 MHz. The size of the overall application is minimized thanks to the high switching frequency and its compatibility with ceramic output capacitors. Two LED6000 regulators can be synchronized in a 180° out-of-phase configuration for reduced total input RMS current. DocID028902 Rev 1 For further information contact your local STMicroelectronics sales office 1/4 www.st.com DocID028902 Rev 1 GND EN VIN SYNCH TP6 J1 TP5 TP3 GND PLANE C12 100p R12 100k VIN 4.7uF 100V C1 TP2 1uF 100V C3 VIN 18 V to 36 V 1uF 100V C4 68nF R4 0 R9 33k R8 47k 11 10 6 5 4 2 3 7 ILIM FSW SS EN VCC VIN_1 VIN_2 16 17 COMP FB LX_1 LX_2 BOOT VBIAS DIM IC GND GND TP LED6000 SYNCH U1 8 9 13 14 15 1 12 3 1 C14 N.M. C7 100nF R3 0 T1 2 2/4 L1 47uH C11 R6 6.8k J3 16V 1uF C13 330pF C9 R17 22k Q1 4.7nF 1 D1 D2 R7 33k R5 N.M. C8 1k R15 2 2STR2160 N.M. R14 0 STPS3L60 BZX384-C56 R16 100k 1uF TP7 R13 0.51 TP9 TP4 ICGND VLED- VLED+ VBIAS GND DIM 15 LEDs, 0.5 A VIN TP8 TP10 TP1 1 C10 3 Schematic diagram STEVAL-ILL084V1 Schematic diagram Figure 1: STEVAL-ILL084V1 circuit schematic GSPG220 1160910SG C15 N.M. C6 STEVAL-ILL084V1 2 Revision history Revision history Table 1: Document revision history Date Version Changes 25-Jan-2016 1 Initial release. DocID028902 Rev 1 3/4 STEVAL-ILL084V1 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2016 STMicroelectronics – All rights reserved 4/4 DocID028902 Rev 1