UCC28810 UCC28811
www. ti. com SLUS865 – OCTOBER 2008
LED LIGHTING POWER CONTROLLER
FEATURES
1
• 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 VREF 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
SIMPLIFIED APPLICATION DIAGRAM
APPLICATIONS
• 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
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.
UCC28810
1 VSENSE VDD 8
2 EAOUT GDRV 7
3 VINS
GND 6
4 ISENSE TZE 5
Bias
Low Pass Filter
Triac Dimming Detect Bias
LED Current Sense
+
+
UDG-08120
1
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 DA...
UCC28810 PDF File
