UCC28811 CONTROLLER Datasheet

UCC28811 Datasheet, PDF, Equivalent


Part Number

UCC28811

Description

LED LIGHTING POWER CONTROLLER

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download UCC28811 Datasheet


UCC28811
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

UCC28811
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 an 8-pin SOIC
(D) package.
ORDERING INFORMATION(1)
TA = TJ
UVLO THRESHOLD gM AMPLIFIER
VOLTAGE (V) SOURCE CURRENT
ON OFF
(µA)
PACKAGE
–40°C to 105°C
15.8
12.5
9.7
9.7
–1300
–300
D
PIN
COUNT
8
SUPPLY
Tube of 80
Reel of 2500
Tube of 80
Reel of 2500
ORDERABLE
DEVICE NUMBER
UCC28810D
UCC28810DR
UCC28811D
UCC28811DR
(1) D (SOIC-8) package is available taped and reeled. Add R suffix to device type (e.g. UCC28810DR) to order quantities of 2,500 devices
per reel.
ABSOLUTE MAXIMUM RATINGS(1)
Input voltage
VDD (Internally clamped)
VSENSE, VINS, ISENSE
Minimum input
voltage
VSENSE, VINS, ISENSE
Input current
VDD
TZE
Output current
GDRV
Output voltage
GDRV
Tstg Storage temperature
TJ Operating temperature
Soldering temperature
VALUE
20
5
–5
30
±10
±750
–5
–55 to 150
–65 to 150
300
UNIT
V
mA
mA
V
°C
(1) Permanent device damage may occur if Absolute Maximum Ratings are exceeded. Exposure to conditions beyond the operational
limits for extended periods of time may affect device reliability. Currents are positive into, and negative out of the specified terminal.
2 Submit Documentation Feedback
Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): UCC28810 UCC28811


Features UCC28810 UCC28811 www.ti.com............ ....................................... ....................................... ....................................... ....................................... ...................... SLUS865 – OCTO BER 2008 LED LIGHTING POWER CONTROLLER FEATURES 1 • Transition Mode Control ler for Low Implementation Cost of AC I nput LED Lighting Applications • Impl ements Single Stage Power Factor Correc ted LED Driver • Enhanced Transient R esponse With Slew-Rate Comparator • I nterfaces with Traditional Wall Dimmers • Accurate Internal VREF for Tight O utput Regulation • Two UVLO Options Overvoltage Protection (OVP), Open-F eedback Protection and Enable Circuits • ±750-mA Peak Gate Drive Current Low Start-Up and Operating Currents Lead (Pb)-Free Packages SIMPLIFIED A PPLICATION DIAGRAM APPLICATIONS • AC Input General Lighting Applications Us ing HB LEDs • Industrial, Commercial and Residential Lighting Fixtures • Outdoor Lighting: Street, Roadway, Parking, Constructi.
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