1FEATURES

• Controlled Reference Derived PFC

• Digital 50/60 Hz Synchronization

• Constant LED current operation

• Single Winding Magnetic Configurations

• Low Typical Operating Current

• Fast Start-up

• Overvoltage Protection

• Feedback Short-Circuit Protection

• Wide Temperature Operation Range

• Low BOM Cost and Small PCB Footprint

• Patent Pending Digital Architecture

• 8-Pin SOIC and 6-Pin TSOT Available

APPLICATIONS

• Non Phase Dimmable LED Lamps shut•

Bulb Replacement

• Area Lighting

DESCRIPTION

The TPS92074 is a hybrid power factor controller

(PFC) optimized for driving LED lighting solutions that do not require phase dimming compatibility. The

device monitors the converter rectified AC waveform

using an internal, low-power, digital controller. The

controller and DAC generate a synchronized triangular reference to regulate the output current. By

allowing for some variation in the LED current over a

line cycle and maintaining a regulated overall average

current, high power factor solutions can be achieved.

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 TPS92074 also includes standard features:

current limit, overvoltage protection, thermal shut•

down, and VCC undervoltage lockout, all in packages utilizing only 6 pins.