STEVAL-ILL088V1 0.55 A, positive buck-boost LED driver board based on LED6000 Data brief Description The STEVAL-ILL088V1 evaluation board is based on a monolithic current source for high power LED driving, the LED6000, a 61 V asynchronous switching regulator. With embedded power MOSFET, it is designed to source up to 3 A DC current depending on the application conditions. The 250 mV typical RSENSE voltage drop, the VBIAS pin embedded switch-over feature and the 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 The current limit threshold and the switching frequency are adjustable for application optimization. The device also includes a 250 kHz oscillator that can be externally adjusted up to 1.5 MHz. 24 to 60 V input voltage Step-up and step-down conversion (up to 14 LEDs) 0.55 A programmed LED current 500 kHz switching frequency Digital dimming Compatible with ceramic output capacitors 180 out-of-phase synchronization Auto-recovery overcurrent and thermal protection RoHS compliant February 2017 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 to reduce the total input RMS current. DocID030327 Rev 1 For further information contact your local STMicroelectronics sales office 1/4 www.st.com DocID030327 Rev 1 GND J1 EN TP6 2 1 TP5 TP3 GND PLANE C2 C12 100p R12 100k 33 F/63 V + 4.7 F 100 V C1 VIN 1 F 100 V C3 SYNCH 1 F 100 V C4 TP2 R4 0 22n F C1 0 R8 47k 33k R9 11 10 6 5 4 2 3 7 ILIM FSW SS EN VCC VIN_1 VIN_2 17 16 TP GND DIM STPS3L60 D1 COMP FB LX_1 LX_2 BOOT VBIAS LED6000 SYNCH U1 8 9 13 14 15 1 1 C7 100nF 2 12 3 R16 N.M. 2.2nF C15 R15 100R R6 C1 1 3k 68uH Q1 68nF D5 BZX384-B12 D4 BAS70 L1 220pF C9 N.M. C13 R7 R5 N.M. STN3N F06L /SOT 22 3 2/4 10k C8 D2 D3 N.M. C16 R18 N.M. N.M. STPS3L60 BZX384-C51 NM TP7 R13 0.47 TP9 TP4 TP8 TP10 TP1 GND VLED- VLED+ VBIAS GND DIM 1 C6 T1 Schematic diagram STEVAL-ILL088V1 Schematic diagram Figure 1: STEVAL-ILL088V1 circuit schematic C5 1u F STEVAL-ILL088V1 2 Revision history Revision history Table 1: Document revision history Date Version 16-Feb-2017 1 Changes Initial release. DocID030327 Rev 1 3/4 STEVAL-ILL088V1 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. (c) 2017 STMicroelectronics - All rights reserved 4/4 DocID030327 Rev 1