Constant Current Led Driver Vs Constant Voltage Driver

Since leds are semi conductors and operate a little differently than most basic circuits it s far easier to simply drive them at their rated current with a constant current driver than it is to try and produce that current by providing a constant voltage.

Constant current led driver vs constant voltage driver.

The output of the led drive power supply is mostly a constant current source that can change the voltage with the change of the led forward voltage drop value. For this use case i am confused on whether to use a constant voltage ac to dc led driver power supply or a constant current ac to dc led driver power supply. The driver receives a standard voltage around 120 277 volts typically found in residential receptacles outlet. A driver marked 12 18 v 350 ma can power the led load in the range of 4 2 6 3 w.

An led light that is rated for constant voltage usually specifies the amount of input voltage it needs to operate correctly. The voltage range and current value of the constant current led drivers are located on the driver. Constant voltage drivers are designated for a single direct current dc output voltage usually 12vdc or 24vdc. For my circuit i want to use 110vac mains power via a triac dimmer to an led driver power supply.

Amperor s constant voltage and constant current led driver family while there are always exceptions to every rule we have determined that the sign industry employs more constant voltage drivers and the lighting industry utilizes more constant current drivers. Constant voltage drivers are designed for a single direct current dc output voltage. Constant voltage led drivers are designed to operate at a single constant output voltage. The most commonly used constant voltage sources are 12 v and 24 v.