How does an LED power supply differ from a regular one?

LED power supplies are products developed specifically for lighting applications. Both constant-voltage (CV) and constant-current (CC) versions are available as an external version, i.e. as a separate device in a housing that interacts with the power grid. The CC version provides output current limiting, stabilisation and diode current regulation. Multiple LEDs can be connected in series to their output. Both types must comply with the stricter electromagnetic emission standards according to EN55015. LED power supplies above 20 watts must have a built-in PFC power factor corrector, but have no restriction on no-load power consumption or minimum efficiency, requiring regulation according to Ecoproduct standards for adapters.

Further differences relate to safety, where LED power supplies have stricter requirements. In the event of a fault, the output voltage must not rise uncontrollably above a safe level. The temperature of the power supply during operation is limited to avoid fire when installed in wooden furniture. Other differences are features such as a special housing and brightness control.