Constant Current Led Driver Vs Constant Voltage Driver

An led light rated for a constant voltage requires a consistent amount of output voltage to ensure a proper operation.

Constant current led driver vs constant voltage driver.

The most commonly used constant voltage sources are 12 v and 24 v. For my circuit i want to use 110vac mains power via a triac dimmer to an led driver power supply. A driver marked 12 18 v 350 ma can power the led load in the range of 4 2 6 3 w. 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.

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. Constant voltage drivers are designated for a single direct current dc output voltage usually 12vdc or 24vdc. The voltage range and current value of the constant current led drivers are located on the 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. Constant voltage drivers are designed for a single direct current dc output voltage. The core components of led power supply include switching controller inductor switching component mosfet feedback resistor input filter device output filter device etc. Constant voltage led drivers are designed to operate at a single constant output voltage.