LED Drivers

LED Driver Category Image

You will need a constant current LED driver to regulate current between your power supply and high-power LED. The LED driver will convert your power supply to constant current with a varying voltage suitable for LEDs, while not allowing the current to exceed the maximum current rating of the LED. This will protect your LED and make sure it is getting the power it needs. Our large LED driver catalog contains drivers with a wide range of outputs as well as drivers and components for dimming and non-dimming applications. We offer LED drivers from top brands like: Recom, Mean Well, MagTech, and LUXdrive. For more on understanding LED drivers see below.

Low Voltage Input ~ Constant Current Output
High Voltage Input ~ Constant Current Output
AC Input ~ Constant Current Ouput by Recom
LED Controllers
Dimming, Flashing, Multi-Channel & more
Line Voltage Input ~ Constant Current Output
AC Input
AC Input ~ Constant Current Output
DC Input
DC Input ~ Constant Current Output

General Information on LED Drivers


LED Driver Functionality Explained

Using an LED driver is crucial in preventing damage to your LED(s). The forward voltage of LEDs change with their temperature. As the temperature increases, forward voltage gets lower, causing the LED to draw more current. The LED will continue to get hotter and draw more current until the LED burns itself out, this process is called 'Thermal Runaway'. Using a constant current LED driver prevents thermal runaway by compensating for the changes in forward voltage while regulating and delivering a constant current to the LED(s).

Guide to Choosing an LED Driver

When choosing the right LED driver you first need to know what you are looking for. It is like finding the right tool for the job, you need to know what you are working with and what you need in a tool (driver). Here are some good questions to start off with in determining what driver is good for you:

  • What type of LEDs are being used and how many?
  • Find out forward voltage, recommended driving current, etc.
  • What type of power will be used? (DC, AC, batteries, automotive, household, etc.)
  • What are the space limitations?
  • Working in a tight area? Need a compact driver or is size not a huge factor?
  • What are the main goals of the application?
  • Size, cost, efficiency, performance, etc.
  • Any special features needed?
  • Dimming, pulsing, microprocessor control, etc.
  • There are two main types of drivers, those that use low voltage DC input (5VDC-32VDC) and those that use high voltage AC input (120-277VAC). The drivers that use high-voltage power are also known as Off-Line Drivers. Getting an LED driver that will work with your lighting application depends on two main factors:

    1. Your input voltage
    2. The drive current you want to use for the LED (you can use this Lumen Comparison chart)

    In most cases using an LED driver with low voltage DC input is recommended. Even if your input is high voltage AC power, lower voltage DC drivers are ideal as they are very efficient and reliable. They also have more options as far as dimming and output current go. Keep in mind that using a low voltage input driver with high voltage AC input does require an additional switching power supply.

    Example LED Circuit with LED Driver - How many LEDs can I run?

    The maximum number of LEDs you can run from a driver is determined by dividing the maximum output voltage of the driver by the forward voltage of your LED(s). When using BuckPuck LED drivers, you determine the maximum output voltage by subtracting 2 volts from your input voltage. For example, when using the Wired 700mA BuckPuck Driver with 24 volt input, you would have a maximum output voltage of 22 volts. You need to subtract the 2 volts because the BuckPuck drivers require a 2 volt overhead to power their internal circuitry.


    Do I need to use an LED driver?
    What does an LED driver do?
    If your LED project uses any LED more powerful than a simple indicator LED, then yes some sort of LED driver is required!
    LED drivers differ from standard power-supplies by delivering a fixed current instead of a fixed voltage. The output voltage from a constant current LED driver will vary as required to maintain the desired output current. The forward voltage drop of LED junctions change with temperature, making a constant current driver necessary. Without a constant current source the risk of thermal runaway and total failure is likely.
    How do I power an LED driver
    Examples of LED and LED driver set-up:
    The most efficient way to power an LED driver is with a low voltage direct current (DC) source. A switching power-supply (laptop) or a battery source are ideal, however if your application doesn't allow, we also offer Off-Line constant current LED drivers (120V Input).
    Example 1: You want to run 3 Cree XP-G2 LEDs in-series at 1400mA from a low voltage DC source. The LUXdrive A009-D-V-14000 BuckBlock driver will accept between 10Vdc-32Vdc and outputs 1400mA. To provided enough power, the input voltage to the driver must me greater than the forward votlage drop of the 3 LEDs in-series. A Cree XP-G2 LED at 1400mA has a forward voltage of 3.1Vdc, and 3.1 X 3 LEDs = 9.3Vdc. A common battery and power-supply size is 12Vdc, which would be a perfect choice. The final check is to make sure your power-supply can support the wattage. Equation: Watts=Amps X Vdc. In this case 1.4A times 9.3Vdc = 13.02 Watts.
    Customer Reviews
    Excellent technical help, quick shipping in US, fair pricing. My only complaint is they need more led parts for my projects. Like, lenses, reflectors. I am not an optics man anymore.
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