STEVAL-ILL051V1 STMicroelectronics

S T E VA L - I L L 0 5 1 V 1 3 A HB LED driver with dimming function based on the LED2000 in an SO-8 Batwing package Data brief Description The STEVAL-ILL051V1 evaluation board provides a platform for evaluating the LED2000, an 850 kHz fixed switching frequency monolithic step-down DC-DC converter designed to operate as 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. Application size 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 (typ) current sense voltage drop PWM dimming 7% output current accuracy Synchronous rectification Internal current limiting Thermal shutdown RoHS compliant May 2016 DocID024369 Rev 2 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ILL051V1 1 Schematic diagram Figure 1: STEVAL-ILL051V1 circuit schematic DIM U1 IC-LED2000-SO8 8 L1A Vin VIN/SW 1 VLED+ SW 3 VINA XAL6060-22 H 4 5 R1 VLED- DIM FB 4.7K PGND GND AGND 2 7 6 JP1 C1 C2 1 , 25 V 2 C3 10 , 25 V RS 150 mOhm 1% 2.2 , 25 V R2 n.m. GND GSPG2505161455SG 2/4 DocID024369 Rev 2 3 1