STEVAL-ILL063V1

STEVAL-ILL063V1 3 A LED driver based on the LED5000 in floating boost topology Data brief Description The STEVAL-ILL063V1 is a product evaluation board based on the LED5000, an 850 kHz fixed switching frequency monolithic step-down DC-DC converter designed to operate as a precise constant current source with an adjustable current capability up to 3 A DC. The embedded PWM dimming circuitry features LED brightness control. The regulated output current level is set by connecting a sensing resistor to the feedback pin. The 200 mV typical RSENSE voltage drop enhances performance in terms of efficiency. The size of the overall application is minimized thanks to the high switching frequency and its compatibility with ceramic output capacitors. The device is fully protected against overheating, overcurrent and output short-circuit. Features              5.5 V to 48 V operating input voltage range 850 kHz fixed switching frequency 200 mV typ. current sense voltage drop Floating boost topology PWM dimming ±3% output current accuracy over temperature 200 mOhm typical RDSON Peak current mode architecture Short-circuit protection Compliant with ceramic output capacitors Inhibit for zero current consumption Thermal shutdown RoHS compliant December 2014 DocID026227 Rev 2 For further information contact your local STMicroelectronics sales office 1/4 www.st.com Schematic diagram 1 STEVAL-ILL063V1 Schematic diagram Figure 1: STEVAL-ILL063V1 board schematic VIN TP1 TP2 D1 7 U1 2 Q1 BC807-16 COMP 1 R3 47K R4 1K INH BO OT EP GND SW R5 47K L1 GND FB DIM R1 10K VLED- 4 C1 100nF 8 6 D2 3 EP R2 6K2 RS1 0.28 C4 3.3n C2 15pF C3 4.7uF 50V TP5 NM STPS3L60U L1A floating GND (Vin-Vout ) NOT switching (Vin-Vout ) < 0 since Vout > Vin SMB FLAT XAL6060 22uH COILCR AFT XAL6060 xx / XAL5050 xx 2/4 5 3 TP4 DIM 2 DocID026227 Rev 2 VLED+ C6 NM LED5000 VIN 1 T1 BZX384-C43 C5 100nF STEVAL-ILL063V1 2 Revision history Revision history Table 1: Document revision history Date Revision Changes 28-Jul-2014 1 Initial release. 17-Dec-2014 2 Minor text edits. No technical changes. DocID026227 Rev 2 3/4 STEVAL-ILL063V1 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. © 2014 STMicroelectronics – All rights reserved 4/4 DocID026227 Rev 2