SSL5101T - LED controller IC


This device is no longer available.  Please see the EOL notice.
  • High-efficiency switch mode buck, flyback or buck-boost controller driving an external power FET
  • Selectable low THD or low LED current ripple modes
  • Full range of internal protections
  • Low component count LED driver solution

Typical Application


The SSL5101T is an offline non-dimmable controller IC, intended to drive non-dimmable LEDs in general lighting applications, like remote-controlled luminaires and smart lamps.

The IC drives an external switch for easy power scaling. It has been designed to start up directly from the High-Voltage (HV) supply by an internal high-voltage current source. Flyback, buck and buck-boost circuit topologies are supported. Primary side sensing provides accurate output current control.

The IC can operate in three switching modes at two switching frequency ranges. It offers tradeoffs between the output current ripple, the mains current Total Harmonic Distortion (THD) and the application size. The IC incorporates many protection features.


  • non-dimmable Retrofit LED lamps
  • non-dimmable Driver modules for LED lighting