UCC256301 Power Datasheet

UCC256301 Datasheet, PDF, Equivalent


Part Number

UCC256301

Description

LLC Resonant Controller Enabling Ultra-Low Standby Power

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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UCC256301
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UCC256301
SLUSCU6B – AUGUST 2017 – REVISED AUGUST 2017
UCC256301 Hybrid Hysteretic Mode Wide VIN LLC Resonant Controller
Enabling Ultra-Low Standby Power
1 Features
1 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)
• LLC Resonant Controller in SOIC16
with High Voltage Clearance
• Create a Custom Design Using the UCC256301
With the WEBENCH® Power Designer
2 Applications
• Digital TV SMPS
• AC-DC Adapter
• Power Tools
• LED Lighting Applications
3 Description
The UCC256301 is a fully featured LLC controller
with integrated high-voltage gate driver. It has been
designed to pair with a PFC stage 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, and with PFC stage running all the time.
UCC256301 includes a range of features designed to
make LLC converter operation well controlled and
robust. This device aims to unburden the LLC
designer and allow mainstream applications to benefit
from efficiency advantages of the LLC topology.
UCC256301 uses hybrid hysteretic control to provide
best in class line and load transient response. The
control effort is approximately linear proportional to
average input current in one cycle. The control makes
the open loop transfer function a first order system so
that it’s very easy to compensate. The system is
always stable with proper frequency compensation.
UCC256301 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
UCC256301
SOIC (16)
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
VIN
BLK
HO
HS
Lr
VCC
Cr
Lm
BW
LO
Vout
AC Line
AC Neutral
ISNS
RHV
1 HV
VCC
3 VCC
BLK 4 BLK
FB 5 FB
VCR
6 ISNS
7 VCR
BW 8 BW
HS 16
HO 15
HB 14
UCC256301
LLC
Controller
RVCC 12
GND 11
LO 10
LL/SS 9
FB
HS
HO
CBOOT
LO
CSS
Copyright © 2017, Texas Instruments Incorporated
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.

UCC256301
UCC256301
SLUSCU6B – AUGUST 2017 – REVISED AUGUST 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 3
5 Pin Configuration and Functions ......................... 4
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5
6.2 ESD Ratings.............................................................. 5
6.3 Recommended Operating Conditions....................... 5
6.4 Thermal Information .................................................. 6
6.5 Electrical Characteristics........................................... 6
6.6 Switching Characteristics .......................................... 8
6.7 Typical Characteristics .............................................. 9
7 Detailed Description ............................................ 14
7.1 Overview ................................................................. 14
7.2 Functional Block Diagram ....................................... 16
7.3 Feature Description................................................. 17
7.4 Device Functional Modes........................................ 31
8 Application and Implementation ........................ 46
8.1 Application Information............................................ 46
8.2 Typical Application ................................................. 46
9 Power Supply Recommendations...................... 61
9.1 VCC Pin Capacitor.................................................. 61
9.2 Boot Capacitor ........................................................ 61
9.3 RVCC Pin Capacitor ............................................... 62
10 Layout................................................................... 63
10.1 Layout Guidelines ................................................. 63
10.2 Layout Example .................................................... 63
11 Device and Documentation Support ................. 64
11.1 Device Support...................................................... 64
11.2 Documentation Support (if applicable).................. 64
11.3 Receiving Notification of Documentation Updates 64
11.4 Community Resources.......................................... 64
11.5 Trademarks ........................................................... 64
11.6 Electrostatic Discharge Caution ............................ 64
11.7 Glossary ................................................................ 65
12 Mechanical, Packaging, and Orderable
Information ........................................................... 65
2 Submit Documentation Feedback
Product Folder Links: UCC256301
Copyright © 2017, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity UCC256301 SLUSCU6B – AUGUST 2 017 – REVISED AUGUST 2017 UCC256301 H ybrid Hysteretic Mode Wide VIN LLC Reso nant Controller Enabling Ultra-Low Stan dby Power 1 Features •1 Hybrid Hyste retic Control (HHC) – Best-in-Class T ransient Response – Easy Compensation Design • Optimized Low Power Feature s Enable 75 mW Standby Power Design wit h PFC on – Advanced Burst Mode Opto-C oupler Low Power Operation – Helps En able Compliance to CoC Tier II Standard • Fast Exit from Burst Mode • Impr oved Capacitive Region Avoidance Scheme • Adaptive Dead-Time • Internal Hi gh-Side Gate Drivers (0.6-A and 1.2-A C apability) • Robust Soft Start with N o Hard Switching • Over Temperature, Output Over Voltage, Input Over and Und er Voltage Protection with Three Levels of Over Current Protections • Wide O perating Frequency Range (35 kHz to 1 M Hz) • LLC Resonant Controller in SOIC16 with High Voltage Clearance • Create a Custom Design .
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