What is an LED Driver

- Jul 25, 2018-

What is an LED Driver?

An LED driver is an electrical device which regulates the power to an LED or a string (or strings) of LEDs. An LED driver responds to the changing needs of the LED, or LED circuit, by providing a constant quantity of power to the LED as its electrical properties change with temperature. An LED driver is a self-contained power supply which has outputs that are matched to the electrical characteristics of the LED or LEDs. LED drivers may offer dimming by means of pulse width modulation circuits and may have more than one channel for separate control of different LEDs or LED arrays. The power level of the LED is maintained constant by the LED driver as the electrical properties change throughout the temperature increases and decreases seen by the LED or LEDs. Without the proper driver, the LED may become too hot and unstable, therefore causing poor performance or failure.


Types of LED Drivers

There are several different kinds of LED drivers. At Future Electronics we stock many of the most common types categorized by output current per channel, supply voltage, output voltage, maximum switching frequency and packaging type.


The most common sizes for supply voltage are 2.3 to 5.5 V, 2.7 to 5.5 V and 3 to 5.5 V. We also carry LED drivers with supply voltage up to 630 V. The output current per channel can be between 250 µA and 50 A, with the most common chips having an output current per channel of 20 mA, 25 mA and 100 mA.



Applications for LED Drivers:

Some applications for LED drivers are:


Industrial / outdoor lighting


Commercial lighting


Residential lighting


Cell phone camera flash


Automotive interior or tail lights


Garden lighting


Portable flashlight / torch


Signage


Elevator lighting


LCD backlighting


Choosing the Right LED Driver:

When you are looking for the right LED drivers, you can filter the results by various attributes with the FutureElectronics.com parametric search: by Supply Voltage (-0.3 to +20 V, 2.7 to 5.5 V, 3 to 5.5 V,… ), Output Voltage (up to 198 V) and Maximum Switching Frequency (from 200 Hz to 200 GHz) to name a few. You will be able to find the right LED driver chip that can be used as a constant current LED driver, high power LED driver, RGB LED driver, 24v LED driver, dimmable LED driver, in an LED driver board or LED driver IC (integrated circuit) and for any circuits that may require LED driver chips.


LED Drivers in Production Ready Packaging or R&D Quantities

If the quantity of LED drivers required is less than a full reel, we offer to customers many of our LED driver products in tube, tray or individual quantities that will help you avoid unneeded surplus.