TPS92075 Buck PFC LED Driver

TPS92075 Buck PFC LED Driver

Texas Instruments' TPS92075 is a hybrid power factor controller (PFC) with a built-in phase-dimming decoder. The device analyzes line cycles continuously using an internal, low-power, digital controller for shape and symmetry. The power converter stage generates an analog current reference and uses it to regulate the output current. The device uses control algorithms to manipulate the analog reference. These algorithms optimize dimmer compatibility, power factor and total harmonic distortion (THD).

Using a constant off-time control, the solution achieves low component count, high efficiency and inherently provides variation in the switching frequency. This variation creates an emulated spread-spectrum effect, easing the converter's EMI signature and allowing a smaller input filter.

  • Controlled reference-derived PFC
  • Integrated digital phase-angle decoder
  • Digital 50/60 Hz synchronization
  • Phase-symmetry balancing
  • Constant LED current operation
  • Fast start-up
  • Dimming implemented via analog reference control
  • Smooth dimming transitions
  • Overvoltage protection
  • Feedback short-circuit protection