What is an LED Driver?
An LED driver is an electrical device which regulates the power delivered to an LED. An LED driver responds to the changing needs of the LED by providing a constant quantity of power supply which has outputs that are matched to the electrical characteristics of the LED.
What are the types of LED Drivers?
There are three types of LED drivers: constant-current, constant-voltage, and AC LED drivers.
If one output voltage is specified, you need a constant-voltage driver.
If there is a range of output voltages, you need a constant-current driver.
If an AC voltage input is specified, you need an AC LED driver.
Internal vs. External Drivers.
LEDs that are designed for household use usually contain internal drivers rather than separate, external drivers because it make replacing outdated lighting simpler. These include LED bulbs with standard screw-in or plug-in bases (E26 / E27 or GU24 / GU10 – see images below) or those that specify a line-voltage (120 volts) input. LEDs that typically require an external driver include cove lights, downlights, and tape lights, as well as certain fixtures, panels, and outdoor-rated lights because it’s simpler and cheaper to replace the driver than the LEDs. These bulbs are used for commercial, outdoor, or roadway lighting purposes.
What are the applications for LED Drivers?
Some common applications for LED drivers are:
Industrial / outdoor lighting
Can a driver operate more than one LED fixture?
In some cases, an external driver can operate more than one light fixture but not always. A driver’s datasheet should specify how many fixtures it can operate.