UCC256302 Controller Datasheet

UCC256302 Datasheet, PDF, Equivalent


Part Number

UCC256302

Description

LLC Resonant Controller

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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UCC256302
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UCC256302
SLUSD69 – NOVEMBER 2017
UCC256302 LLC Resonant Controller with High Voltage Startup
Enabling Low Standby Power
1 Features
1 Integrated High Voltage Startup
– Eliminates Need for External
Bias Supply
• Best-in-Class Transient Response
• Hybrid Hysteretic Control (HHC)
– Best-in-Class Transient Response
– Easy Compensation Design
• Optimized Low Power Features Enable 75 mW
Standby Power Design with PFC on
– Advanced Burst Mode
Opto-Coupler Low Power Operation
– Helps Enable Compliance to CoC Tier II
Standard
• Fast Exit from Burst Mode
• Improved Capacitive Region Avoidance Scheme
• Adaptive Dead-Time
• Internal High-Side Gate Drivers
(0.6-A and 1.2-A Capability)
• Robust Soft Start with No Hard Switching
• Over Temperature, Output Over Voltage, Input
Over and Under Voltage Protection with
Three Levels of Over Current Protections
• Wide Operating Frequency Range
(35 kHz to 1 MHz)
• Select the appropriate LLC resonant controller for
your design with UCC25630x Selection
GuideUCC25630x Selection Guide
• Create a Custom Design Using the UCC256302
With the WEBENCH® Power Designer
3 Description
The UCC256302 is a fully featured LLC controller
with integrated high-voltage gate driver. It has been
designed for use in offline AC-DC or isolated DC-DC
to provide a complete power system using a
minimum of external components. The resulting
power system is designed to meet the most stringent
requirements for standby power without the need for
a separate standby power converter.
UCC256302 includes an integrated, high voltage
startup function which eliminates the need for an
external bias supply, reducing BOM count and
minimizing solution size. UCC256302 uses hybrid
hysteretic control to provide best in class line and
load transient response. The control makes the open
loop transfer function a first order system so that it’s
very easy to compensate.
UCC256302 provides a high efficient burst mode with
consistent burst power level during each burst on
cycle. The burst power level is programmable and
adaptively changes with input voltage, making the
optimization of efficiency very easy.
Select the appropriate LLC resonant controller for
your design with UCC25630x Selection Guide
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
UCC256302
SOIC (14)
9.9 mm x 3.9 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
2 Applications
• Digital TV SMPS
• AC-DC Adapter
• Multi-Functional Printers
• Projectors
• Merchant DC-to-DC
• High Power Battery Charging
• DIN Rail Power Supply
• Multi-Axis Servo
• ATX Power Supply
• Appliances
• LED Lighting Applications
• Industrial AC-DC
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.

UCC256302
UCC256302
SLUSD69 – NOVEMBER 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Pin Configuration and Functions ......................... 3
5 Specifications......................................................... 4
5.1 Absolute Maximum Ratings ...................................... 4
5.2 ESD Ratings.............................................................. 4
5.3 Recommended Operating Conditions....................... 4
5.4 Thermal Information .................................................. 5
5.5 Electrical Characteristics........................................... 5
5.6 Switching Characteristics .......................................... 7
5.7 Typical Characteristics .............................................. 8
6 Detailed Description ............................................ 13
6.1 Overview ................................................................. 13
6.2 Functional Block Diagram ....................................... 15
6.3 Feature Description................................................. 16
6.4 Device Functional Modes........................................ 29
7 Application and Implementation ........................ 42
7.1 Application Information............................................ 42
7.2 Typical Application ................................................. 42
8 Power Supply Recommendations...................... 56
8.1 VCC Pin Capacitor.................................................. 56
8.2 Boot Capacitor ........................................................ 56
8.3 RVCC Pin Capacitor ............................................... 57
9 Layout ................................................................... 58
9.1 Layout Guidelines ................................................... 58
9.2 Layout Example ...................................................... 58
10 Device and Documentation Support ................. 59
10.1 Device Support...................................................... 59
10.2 Documentation Support ....................................... 59
10.3 Receiving Notification of Documentation Updates 59
10.4 Community Resources.......................................... 59
10.5 Trademarks ........................................................... 59
10.6 Electrostatic Discharge Caution ............................ 59
10.7 Glossary ................................................................ 60
11 Mechanical, Packaging, and Orderable
Information ........................................................... 60
2 Submit Documentation Feedback
Product Folder Links: UCC256302
Copyright © 2017, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity UCC256302 SLUSD69 – NOVEMBER 2017 UCC256302 LLC Resonant Controller with High Voltage Startup Enabling Low Standby Power 1 Features •1 Integrat ed High Voltage Startup – Eliminates Need for External Bias Supply • Best- in-Class Transient Response • Hybrid Hysteretic Control (HHC) – Best-in-Cl ass Transient Response – Easy Compens ation Design • Optimized Low Power Fe atures Enable 75 mW Standby Power Desig n with PFC on – Advanced Burst Mode O pto-Coupler Low Power Operation – Hel ps Enable Compliance to CoC Tier II Sta ndard • Fast Exit from Burst Mode • Improved Capacitive Region Avoidance S cheme • Adaptive Dead-Time • Intern al High-Side Gate Drivers (0.6-A and 1. 2-A Capability) • Robust Soft Start w ith No Hard Switching • Over Temperat ure, Output Over Voltage, Input Over an d Under Voltage Protection with Three L evels of Over Current Protections • Wide Operating Frequency Range (35 kHz to 1 MHz) • Select t.
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