A 40-watt constant current TRIAC dimmer with a dimming range from 0 to 100%. It is compatible with leading-edge and trailing-edge dimmers and ensures flicker-free lighting throughout the dimming process. The nominal input voltage ranges from 198 to 253 volts AC, and the output current is adjustable from 700 to 1050 mA in 50 mA increments using a DIP switch.