UCC25710 Controller Datasheet

UCC25710 Datasheet, PDF, Equivalent


Part Number

UCC25710

Description

LLC Half-Bridge Controller

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download UCC25710 Datasheet


UCC25710
Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
Reference
Design
UCC25710
SLUSAD7B – APRIL 2011 – REVISED JULY 2016
UCC25710 LLC Half-Bridge Controller For Multi-String LED Lighting
1 Features
1 Closed-Loop LED String Current Control
• PWM Dimming Input
• Adjustable FMIN (3% accuracy), and FMAX (7.5%
Accuracy)
• LLC and Series LED Switch Control for Dimming
• Programmable Dimming LLC ON/OFF Ramp for
Elimination of Audible Noise
• Closed-Loop Current Control at Low Dimming
Duty Cycles
• Programmable Soft Start
• Accurate VREF for Tight Output Regulation
• Overvoltage, Undervoltage and Input Overcurrent
Protection With Auto-Restart Response
• Second Overcurrent Threshold With Latch-Off
Response
• 400-mA/-800-mA Gate Drive Current
• Low Start-Up and Operating Currents
• Lead (Pb)-Free, 20-Pin, SOIC Package
2 Applications
• LED Backlight for LCD TV and Monitors
• LED General Lighting
SPACE
Simplified Application Diagram
LED String 1
T1 ± +
VIN
3 Description
The UCC25710 device is an LLC half-bridge
controller for accurate control of multi-string LED
backlight applications. It is optimized for multi-
transformer, multi-string LED architectures. Superior
LED current matching in multiple strings can be
achieved with this controller and architecture.
Compared to existing LED backlight solutions, the
multi-transformer architecture provides the highest
overall efficiency from AC input to LED load.
The LLC controller function includes a Voltage
Controlled Oscillator (VCO) with programmable FMIN
and FMAX, half-bridge gate drivers with a fixed dead
time of 500 ns and a GM current amplifier. The LLC
power delivery is modulated by the controller’s VCO
frequency. The VCO has an accurate and
programmable frequency range. At very low power
levels the VCO frequency goes from FMAX to zero to
maximize efficiency at low LED currents.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
UCC25710
SOIC (20)
12.80 mm × 7.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Efficiency and Linearity Results (Dual 45-W
Strings)
100 4
LED String 2
T2 ± +
20 V to 9.5 V
TN
ON/OFF
UCC25710
1 VCC
DTY 7
10 BLON
DADJ 8
2 GD1
FMIN 20
3 GD2
FMAX 19
4 GND
SS 18
13 CL
ICOMP 17
15 CREF
CS 16
5 VREF LEDSW 6
14 DSR
OV 12
9 DIM
UV 11
DIM PWM Output
LED String N
±+
Copyright © 2016, Texas Instruments Incorporated
95
90
85
80
0
Efficiency
2
Linearity
0
-2
10
Dimming Duty Cycle -%
-4
100
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.

UCC25710
UCC25710
SLUSAD7B – APRIL 2011 – REVISED JULY 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Description (continued)......................................... 3
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 6
7.1 Absolute Maximum Ratings ...................................... 6
7.2 ESD Ratings.............................................................. 6
7.3 Recommended Operating Conditions....................... 6
7.4 Thermal Information .................................................. 7
7.5 Electrical Characteristics........................................... 7
7.6 Typical Characteristics ............................................ 10
8 Detailed Description ............................................ 13
8.1 Overview ................................................................. 13
8.2 Functional Block Diagram ....................................... 14
8.3 Feature Description................................................. 15
8.4 Device Functional Modes........................................ 19
9 Application and Implementation ........................ 20
9.1 Application Information............................................ 20
9.2 Typical Application ................................................. 20
10 Power Supply Recommendations ..................... 31
11 Layout................................................................... 31
11.1 Layout Guidelines ................................................. 31
11.2 Layout Example .................................................... 32
12 Device and Documentation Support ................. 33
12.1 Receiving Notification of Documentation Updates 33
12.2 Community Resource............................................ 33
12.3 Trademarks ........................................................... 33
12.4 Electrostatic Discharge Caution ............................ 33
12.5 Glossary ................................................................ 33
13 Mechanical, Packaging, and Orderable
Information ........................................................... 33
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (May 2011) to Revision B
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
2 Submit Documentation Feedback
Product Folder Links: UCC25710
Copyright © 2011–2016, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design UCC25710 S LUSAD7B – APRIL 2011 – REVISED JULY 2016 UCC25710 LLC Half-Bridge Controll er For Multi-String LED Lighting 1 Fea tures •1 Closed-Loop LED String Curre nt Control • PWM Dimming Input • Ad justable FMIN (3% accuracy), and FMAX ( 7.5% Accuracy) • LLC and Series LED S witch Control for Dimming • Programma ble Dimming LLC ON/OFF Ramp for Elimina tion of Audible Noise • Closed-Loop C urrent Control at Low Dimming Duty Cycl es • Programmable Soft Start • Accu rate VREF for Tight Output Regulation Overvoltage, Undervoltage and Input Overcurrent Protection With Auto-Restar t Response • Second Overcurrent Thres hold With Latch-Off Response • 400-mA /-800-mA Gate Drive Current • Low Sta rt-Up and Operating Currents • Lead ( Pb)-Free, 20-Pin, SOIC Package 2 Applic ations • LED Backlight for LCD TV and Monitors • LED General Lighting SPACE Simplified Application Diagram LED String 1 T1 ± + VIN .
Keywords UCC25710, datasheet, pdf, etcTI, LLC, Half-Bridge, Controller, CC25710, C25710, 25710, UCC2571, UCC257, UCC25, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




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