STEVAL-ILL064V1 STMicroelectronics

STEVAL-ILL064V1 3 A LED driver based on the LED5000 in BB- topology Data brief Short-circuit protection Compliant with ceramic output capacitors Inhibit for zero current consumption Thermal shutdown RoHS compliant Description The STEVAL-ILL064V1 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 Features voltage drop enhances performance in R SENSE terms of efficiency. 5.5 V to 48 V operating input voltage range 850 kHz fixed switching frequency The size of the overall application is minimized 200 mV typ. current sense voltage drop thanks to the high switching frequency and its BB- boost topology compatibility with ceramic output capacitors. The PWM dimming device is fully protected against overheating, 3% output current accuracy over overcurrent and output short-circuit. temperature 200 mOhm typical R DSON Peak current mode architecture August 2014 DocID026228 Rev 1 1/4 www.st.com For further information contact your local STMicroelectronics sales office Board schematic STEVAL-ILL064V1 1 Board schematic Figure 1: Schematic 2/4 DocID026228 Rev 1