STEVAL-ILL046V1 STMicroelectronics

S T E VA L - I L L 0 4 6 V 1 HB LED driver with inhibit based on the ST1CC40 in a QFN package Data brief Description The STEVAL-ILL046V1 evaluation board is based on the ST1CC40, which is 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 of up to 3 A DC. In closed loop operation, the ST1CC40 feedback pin voltage is 100 mV thus the sensing resistor calculation is expressed as Rs = 100 mV/ILED. The STEVAL-ILL046V1 is provided with 660 mA by connecting a 150 mW sensing resistor to the feedback pin. The overall application size is minimized, thanks to the high switching frequency and ceramic Features output capacitor compatibility. 3 to 18 V operating input voltage range The STEVAL-ILL046V1 evaluation board is fully 850 kHz fixed switching frequency protected against overheating, overcurrent and 100 mV (typ) current sense voltage drop output short-circuit. 6 A standby current in inhibit mode 7% output current accuracy The inhibit mode minimizes the current Synchronous rectification consumption in standby (6 A) to maximize Embedded compensation network battery life in portable devices. Internal current limiting Ceramic output capacitor compliant Thermal shutdown RoHS compliant May 2016 DocID024104 Rev 2 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ILL046V1 1 Schematic diagram Figure 1: STEVAL-ILL046V1 circuit schematic DIM U1 IC-ST1CC40-VFQFPN8 6 L1A Vin VIN/SW 7 VLED+ SW 1 VINA XAL5050-15 H 2 3 R1 DIM FB VLED- 0R 5 PGND AGND EP NC 8 4 9 JP1 C1 C2 2 1 , 25 V 10 , 25 V RS C3 150 mohm 1% 2.2 , 25 V R2 n.m. GND GSPG2405161520SG 2/4 DocID024104 Rev 2 3 1