STEVAL-ILL056V1 STMicroelectronics

STEVAL-ILL056V1 3 A buck LED driver board based on the LED5000 Data brief Description The STEVAL-ILL056V1 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 Features device is fully protected against overheating, overcurrent and output short-circuit. 5.5 V to 48 V operating input voltage range 850 kHz fixed switching frequency 200 mV typ. current sense voltage drop Buck / buck-boost / floating boost topologies PWM dimming 3% output current accuracy over temperature 200 mOhm typical R DS(on) Peak current mode architecture Short-circuit protection Compliant with ceramic output capacitors Inhibit for zero current consumption Thermal shutdown RoHS compliant November 2013 DocID025539 Rev 1 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ILL056V1 1 Schematic diagram Figure 1: STEVAL-ILL056V1 circuit schematic 2/4 DocID025539 Rev 1 C6 100n F L 1A = C O IL C R A F T M S S 7341 0603 / 0805 L 1 = C O IL C R A F T X A L 6060 O X A L 5050 L1 A M S S 7341 U1 S T 1C C 14 TP 4 L1 JP 1 1 8 B OOT SW V LE D + TP 1 33u H D3 C8 D IM 2 D IM 1u F 1206+1210 fo o tp r in t TP 2 B Z X 384-C 39 50V V IN 7 5 V IN FB V LE D - R1 R4 2k 3 TP 5 IN H NM G ND EP C O MP IN H TP 8 6 EP 4 C7 R3 RS 1u F D2 22K 1206+1210 fo o tp r in t R2 R 56 50V B Z X 84 JP 2 C1 C2 C3 NM 10u F 10u F 100n F C5 50V 50V 50V 15p F C4 220p F TP 6 s m a ll s ig n a l TP 3 G ND G ND po w e r pla n e 0603 / 0805 2 1 D1 S T P S 3L 60U C A S E 1206