Constant Current Led Driver Vs Constant Voltage Driver

Constant voltage drivers are designated for a single direct current dc output voltage usually 12vdc or 24vdc.

Constant current led driver vs constant voltage driver.

The driver receives a standard voltage around 120 277 volts typically found in residential receptacles outlet. 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. For my circuit i want to use 110vac mains power via a triac dimmer to an led driver power supply. An led light rated for a constant voltage requires a consistent amount of output voltage to ensure a proper operation.

A driver marked 12 18 v 350 ma can power the led load in the range of 4 2 6 3 w. Constant voltage drivers are designed for a single direct current dc output voltage. Most common constant voltage drivers or power supplies are 12vdc or 24vdc. An led light that is rated for constant voltage usually specifies the amount of input voltage it needs to operate correctly.

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. 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. The most commonly used constant voltage sources are 12 v and 24 v.