DatasheetsPDF.com

UCC28810 Dataheets PDF



Part Number UCC28810
Manufacturers Texas Instruments
Logo Texas Instruments
Description LED LIGHTING POWER CONTROLLER
Datasheet UCC28810 DatasheetUCC28810 Datasheet (PDF)

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 • Int.

  UCC28810   UCC28810


Document
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 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 UCC28810 UCC28811 SLUS865 – OCTOBER 2008.............................................................................................................................................................................................. www.ti.com DESCRIPTION (CONTINUED) In the critical conduction mode operation, the PWM circuit is self-oscillating with the turn-on being governed by a transformer zero energy detector (TZE pin) and the turn-off being governed by the current sense comparator. Additionally, the controller provides features such as peak current limit, restart timer, overvoltage protection (OVP), and enable. The efficient system performance is attained by incorporation of zero power detect function which allows the controller output to shut down at light load conditions without running into overvoltage. The device also features an innovative slew rate enhancement circuit which improves the large signal transient performance of the voltage error amplifier. The low start-up and operating currents of the device result in low power consumption and ease of start-up. The highly-accurate internal bandgap reference leads to tight regulation of the output voltage in normal and OVP conditions, resulting in higher system reliability. The enable comparator ensures that the controller is off if the feedback sense path is broken or if the input voltage is very low. There are two key parametric differences between UCC28810 and UCC28811, the UVLO turn-on threshold and the gM amplifier source current. The UVLO turn-on threshold of the UCC28810 is 15.8 V and for the UCC28811 it is 12.5 V. The gM amplifier source current for UCC28810 is typically 1.3 mA, and for the UCC28811 it is 300µA. The higher UVLO turn-on threshold of the UCC28810 allows quicker and easier start-up with a smaller VDD capacitance while the lower UVLO turn-on threshold of UCC28811 allows operation of the critical conduction mode controller to be easily controlled by the downstream PWM controller in two-stage power converters. The UCC28810 gM amplifier also provides a full 1.3-mA typical source current for faster start-up and improved transient response when the output is low either at start-up or during transient conditions. The UCC28811 is suitable for applications such as street lights and larger area luminaires where a two-stage power conversion is needed. The UCC28810 is suitable for applications such as commercial or residential retrofit luminaires where there is no down-stream PWM conversion and the advantages of smaller VDD capacitor and improved transient response can be realized. Devices are available in the industrial temperature range of –40°C to 105°C. Package offering is .


UCC28881 UCC28810 UCC28811


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)