The modules have have multiple channels to provide varying currents to different LED’s. This means the voltage provided to one LED can be greater or less than the power to another. These modules are used to power LED’s in a number of different devices, including LED televisions. Most LED’s require a voltage range of 30-42 volts, and a module can be adjusted to power a string of these tiny lights.
https://www.futureelectronics.com/c/semiconductors/Led-lighting-components--led-driver-modules-rev
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