1FEATURES

• 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

• Leading and Trailing Edge Dimmer

Compatibility

• Low BOM Cost and Small PCB Footprint

• Patent Pending Digital Architecture shut•

Available in 8-Pin SOIC and 6-Pin TSOT

APPLICATIONS

• Bulb Replacement

• Area Lighting

• Dimmable and Non-Dimmable LED Lamps

DESCRIPTION

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 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 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 utilizing only 6 pins.