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What are the different types of dimming for LED drivers?

Hatch Constant Current LED drivers are available with different types of dimming. Hatch Constant Voltage drivers are non-dimmable. The dimming types are explained below:

  1. Phase Dimming
    • There are two types of Phase Dimming: Leading Edge Dimming and Trailing Edge Dimming
    • Hatch LED drivers with a “P” in the part number after the current rating are compatible with both Leading Edge and Trailing Edge Phase Dimmers (i.e. LC25-0700P-120Q is a 700mA driver with Phase Dimming built in)
    • Leading Edge dimming is sometimes called Forward Phase or TRIAC dimming
    • Trailing Edge dimming is sometimes called Reverse Phase or Electronic Low Voltage Dimming.
    • There is a massive installed base of phase dimmers which is why they are so popular.
    • There are no additional wires on a Phase Dimming driver. The dimmer is wired in line with the output of the driver.
    • Phase dimming is only available in 120V input
  2. 0-10V Dimming
    • This dimming type is used in most new construction and commercial applications.
    • Hatch LED drivers with a “Z” in the part number after the current rating are compatible with 0-10V dimmers (i.e. LC25-0700Z-UNV-Q is a 700mA driver with 0-10V dimming built in)
    • There are extra wires (usually grey and purple) on the driver that hook up to the 0-10V dimmer.
    • 9V is the maximum light level and 1V is the minimum light level.
    • 0-10V dimming is available in universal 120V-277V input.