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SLUS865 – OCTOBER 2008
LED LIGHTING POWER CONTROLLER
1
FEATURES
Transition Mode Controller for Low
Implementation Cost of AC Input LED Lighting
Applications
Implements Single Stage Power Factor
Corrected LED Driver
Enhanced Transient Response With Slew-Rate
Comparator
Interfaces with Traditional Wall Dimmers
Accurate Internal V
REF
for Tight Output
Regulation
Two UVLO Options
Overvoltage Protection (OVP), Open-Feedback
Protection and Enable Circuits
±750-mA Peak Gate Drive Current
Low Start-Up and Operating Currents
Lead (Pb)-Free Packages
APPLICATIONS
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AC Input General Lighting Applications Using
HB LEDs
Industrial, Commercial and Residential
Lighting Fixtures
Outdoor Lighting: Street, Roadway, Parking,
Construction and Ornamental LED Lighting
Fixtures
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DESCRIPTION
The UCC28810 and UCC28811 are general lighting
power controllers for low to medium power lumens
applications requiring power factor correction and
EMC compliance. It is designed for controlling a
flyback, buck or boost converter operating in critical
conduction mode. It features a transconductance
voltage amplifier for feedback error processing, a
simple current reference generator for generating a
current command proportional to the input voltage, a
current-sense (PWM) comparator, PWM logic and a
totem-pole driver for driving an external FET.
SIMPLIFIED APPLICATION DIAGRAM
Bias
UCC28810
1
2
3
4
VSENSE
VDD
8
7
6
5
LED
Current
Sense
Bias
Low Pass
Filter
EAOUT GDRV
VINS
ISENSE
GND
TZE
Triac Dimming
Detect
+
+
UDG-08120
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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 © 2008, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
