The definition of Constant Current LED Driver
Typically, LEDs are operated (or “Driven”) such that their (average) current is constant (Constant Current), power electronics components (led driver ICs, transformers. etc), are used to create power supply circuits which convert AC voltage into regulated LED constant (average) current.
A constant current power supply varies the voltage across an electronic circuit allowing the device to maintain a constant electric current. This thus ensures that, no matter the variation in voltage, the current delivered to LEDs does not change.
In contrast to constant current led power supplies, constant voltage drivers are designed to operate with LED modules requiring a fixed voltage (ac to dc power supply), typically 12 or 24V DC. Modules are connected in parallel across the driver’s output power.
Constant current or constant voltage led driver? Which is better?
Advantages of using the constant current power supply: More consistent brightness and less light decay due to more stable and reliable output current for driving LEDs, as a result, it is able to have longer lifespan than the constant voltage led driver.