LED Driver Sizing Calculator

Calculate LED driver current, voltage, and wattage for series and parallel LED string configurations.

Forward voltage per LED. White: 3.0-3.5V, Red: 1.8-2.2V.
V
Drive current per LED. Standard: 20mA, High power: 350-700mA.
mA
Number of LEDs connected in series per string.
Number of parallel strings.
LED driver efficiency. Good: 85-92%.
%

Results

Driver Output Voltage-V
Driver Output Current-mA
LED Power-W
Driver Input Power-W
Total LEDs-
References: IES LM-80; ENERGY STAR LED Requirements