This data brief introduces STEVAL-ILL041V1, a 93% efficient LED driver solution that meets the present requirements for the US market.
The STEVAL-ILL041V1 is a demonstration board implementing an LED driver designed to meet requirements for the US commercial market. It utilizes ST's L6564 power factor controller in an unconventional circuit to regulate input power and maintain average output current over wide ranges of line voltage and LED characteristics.
The solution achieves greater than 93% efficiency with a power factor exceeding 0.97, operating within a 90 V-138 V line range while driving 18 series-connected 1 W LEDs at an output current of 350 mA +/-3%. The form factor is designed to fit into the PAR38 envelope, allowing it to replace 65 W incandescent flood lamps.
The driver provides an output current of 350 mA with a tolerance of plus or minus 3%.
The device operates over a line voltage range from 90 V to 138 V.
The driver is designed to support a load of 18 LEDs connected in series.
The form factor was designed to fit into the PAR38 envelope.