STEVAL-ILL051V2 STMicroelectronics

S T E VA L - I L L 0 5 1 V 2 3 A HB LED driver with dimming function based on the LED2000 in a QFN package Data brief Description The purpose of the STEVAL-ILL051V2 evaluation board is to aid in the evaluation of the LED2000, an 850 kHz fixed switching frequency monolithic step-down DC-DC converter. The LED2000 is 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 is set by connecting a sensing resistor to the feedback pin. The size of the overall application is minimized thanks to the high switching frequency and ceramic output capacitor compatibility. Features The device is fully protected against overheating, 3.0 V to 18 V operating input voltage range overcurrent and output short-circuit. 850 kHz fixed switching frequency 100 mV typical current sense voltage drop PWM dimming 7% output current accuracy Synchronous rectification Internal current limiting Thermal shutdown RoHS compliant May 2016 DocID024236 Rev 2 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ILL051V2 1 Schematic diagram Figure 1: STEVAL-ILL051V2 circuit schematic DIM U1 IC-LED2000-VFQFPN8 6 L1A Vin VIN/SW 7 VLED+ SW 1 VINA XAL6060-22 H 2 3 R1 VLED- DIM FB 4.7K 5 NC PGND AGND EP 8 4 9 JP1 C1 C2 1 , 25 V 10 , 25 V 2 C3 RS 150 mohm 1% 2.2 , 25 V R2 n.m. GND GSPG2505161550SG 2/4 DocID024236 Rev 2 3 1