STEVAL-ILL078V1

STEVAL-ILL078V1 1 A, up to 60 V input buck LED driver evaluation board based on the LED6000 Data brief Description The STEVAL-ILL078V1 product evaluation board is based on the LED6000 monolithic current source for high power LED driving. Digital dimming is implemented by driving the dedicated DIM pin. Low drop-out operation with almost 100% duty cycle can be achieved. The LED6000 is a 61 V asynchronous switching regulator with embedded power MOSFET, designed to source up to 3 A of DC current depending on the application conditions. The 250 mV typical RSENSE voltage drop, the embedded switch-over feature on the VBIAS pin and light load management (pulse skipping) are intended to maximize power conversion efficiency across the entire load range. Features          4.5 V to 60 V input voltage Step-down conversion 1 A programmed LED current 500 kHz switching frequency Digital dimming Uses ceramic output capacitors 180° out-of-phase synchronization available Auto-recovery overcurrent and thermal protection RoHS compliant September 2015 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 its high switching frequency and compatibility with ceramic output capacitors. Two LED6000 regulators can be synchronized in a 180° out-of-phase configuration for reduced total input RMS current. DocID028415 Rev 1 For further information contact your local STMicroelectronics sales office 1/4 www.st.com 2/4 100k 100V 1uF C3 100V 4.7µF C2 100V 4.7µF C1 DocID028415 Rev 1 C12 100p 100V 1µF 1nF 47k R8 33k R9 11 10 6 5 4 U1 ILIM FSW SS EN VCC VIN_1 VIN_2 SYNCH GND 16 TP 17 FB LX_1 LX_2 8 9 13 14 15 1 12 STPS2L60 D1 COM P LED6000 BOO T VBIAS DIM C7 100nF 4.7k R5 C11 L1 R6 16V 1uF C13 2 T1 220pF C9 R7 N.M. 2.2n 1.5k C8 BZX384 D2 47uH N.M. 3 TP6 J1 TP5 R12 R4 0 2 3 7 NM GND EN TP3 TP2 NM TP7 R13 0.24 TP9 TP4 TP8 TP1 GND VLED- VLED+ VBIAS DIM 1 VIN SYNCH R1 Schematic diagram STEVAL-ILL078V1 Schematic diagram Figure 1: STEVAL-ILL078V1 circuit schematic 470nF C5 C6 C10 C4 GSPG2509151040SG STEVAL-ILL078V1 2 Revision history Revision history Table 1: Document revision history Date Version Changes 01-Oct-2015 1 Initial release. DocID028415 Rev 1 3/4 STEVAL-ILL078V1 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. © 2015 STMicroelectronics – All rights reserved 4/4 DocID028415 Rev 1