The 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
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 converters
EMI signature and allowing a smaller input filter.
The TPS92075 also includes standard features: current limit, overvoltage
protection, thermal shut-down, and VCC undervoltage lockout, all in packages