Power Supplies Board Mount
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LEDs are current-driven devices that require current limiting when driven from a voltage source. In most applications, it is desirable to drive LEDs with a constant-current source. The current source is used to regulate the current through the LED regardless of power supply. It means to supply a regulated voltage to the application it is connected to. Sometimes, the power supply can be built with multiple channels delivering different voltage outputs, even in different load conditions. The whole power supply can still be treated as a constant voltage source.
Power Supplies Board Mount Manufacturer's List
Power Supplies Board Mount Part Number List