STEVAL-ILL084V1 STMicroelectronics

S T E VA L - I L L 0 8 4 V 1 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 R voltage SENSE 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 Features by driving the dedicated DIM pin. 18 V to 36 V input voltage The current limit threshold and the switching Step-up conversion (up to 15 LEDs) frequency are adjustable for application 0.5 A programmed LED current optimization. The device includes an internal 250 500 kHz switching frequency kHz oscillator that can be externally adjusted up to 1.5 MHz. The size of the overall application is Digital dimming minimized thanks to the high switching frequency Compliant with ceramic output capacitors and its compatibility with ceramic output 180 out-of-phase synchronization available capacitors. Two LED6000 regulators can be Auto recovery overcurrent and thermal synchronized in a 180 out-of-phase protection configuration for reduced total input RMS current. RoHS compliant January 2016 DocID028902 Rev 1 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ILL084V1 1 Schematic diagram Figure 1: STEVAL-ILL084V1 circuit schematic GSPG220 1160910SG 2/4 DocID028902 Rev 1 Q1 2STR2160 TP1 3 2 DIM R16 T1 R17 100k 3 1 R15 VIN 18 V to 36 V 22k TP10 GND U1 TP2 1k 7 12 SYNCH SYNCH DIM TP3 TP8 VIN 2 1 VIN VBIAS VIN 1 VBIAS 3 R3 0 C13 D2 VIN 2 15 BZX384-C56 R4 BOOT J3 1uF R12 0 100k 4 LED6000 100nF 16V VCC TP4 TP5 C7 VIN 5 13 D1 VLED+ EN EN LX 1 STPS3L60 14 LX 2 6 R5 N.M. C8 N.M. SS 9 FB 10 C12 FSW R6 6.8k C9 4.7nF R14 100p J1 68nF 11 8 ILIM COMP TP GND 0 TP9 R7 33k VLED- C11 330pF 17 16 1uF R9 R8 R13 C14 33k 47k 0.51 N.M. TP7 IC GND ICGND TP6 GND L1 GND PLANE 47uH 15 LEDs, 0.5 A C1 4.7uF 100V C3 1uF 100V C4 1uF 100V C10 2 1 C6 C15 N.M.