TPS92074 Datasheet, PDF (1/24 Pages) Texas Instruments – Non-Isolated, Buck PFC LED Driver with Digital Reference Control

TPS92074
www.ti.com
SLUSBO7 – AUGUST 2013
Non-Isolated, Buck PFC LED Driver with Digital Reference Control
Check for Samples: TPS92074
FEATURES
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• 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
• 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.
SIMPLIFIED APPLICATION DIAGRAM
EMI Filter
LED +
TPS92074
VSEN COFF
GND VCC
LED -
ISNS GATE
V_IN
AC
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated