Constant Current Led Driver Vs Constant Voltage Driver

Constant voltage led drivers are designed to operate at a single constant output voltage.

Constant current led driver vs constant voltage driver.

An led light that is rated for constant voltage usually specifies the amount of input voltage it needs to operate correctly. A driver marked 12 18 v 350 ma can power the led load in the range of 4 2 6 3 w. 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. An led light rated for a constant voltage requires a consistent amount of output voltage to ensure a proper operation.

The driver receives a standard voltage around 120 277 volts typically found in residential receptacles outlet. The most commonly used constant voltage sources are 12 v and 24 v. The voltage range and current value of the constant current led drivers are located on the driver. 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.

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 voltage drivers are designed for a single direct current dc output voltage. Most common constant voltage drivers or power supplies are 12vdc or 24vdc. The core components of led power supply include switching controller inductor switching component mosfet feedback resistor input filter device output filter device etc.