UCC256303 Power Datasheet

UCC256303 Datasheet, PDF, Equivalent


Part Number

UCC256303

Description

LLC Resonant Controller Enabling Ultra-Low Standby Power

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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UCC256303
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UCC256303
SLUSD49A – SEPTEMBER 2017 – REVISED JANUARY 2019
UCC256303 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
• External Bias Required
• Create a Custom Design Using the UCC256303
With the WEBENCH® Power Designer
2 Applications
• Digital TV SMPS
• AC-DC Adapter
• Gaming
• Desktop PC
3 Description
The UCC256303 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.
UCC256303 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.
UCC256303 uses hybrid hysteretic control to provide
best in class line and load transient response. The
control effort is approximately linearly 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.
UCC256303 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)
UCC256303
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
VIN
BLK
HO
HS
LO
Lr Cr
Lm
BW
Vout
1 HV
External Bias
3 VCC
BLK 4 BLK
FB 5 FB
ISNS
VCR
6 ISNS
7 VCR
BW 8 BW
HS 16
HO 15
HB 14
UCC256303
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.

UCC256303
UCC256303
SLUSD49A – SEPTEMBER 2017 – REVISED JANUARY 2019
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....................... 6
6.4 Thermal Information .................................................. 6
6.5 Electrical Characteristics........................................... 7
6.6 Switching Characteristics .......................................... 9
6.7 Typical Characteristics ............................................ 10
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 ........................ 43
8.1 Application Information............................................ 43
8.2 Typical Application ................................................. 43
9 Power Supply Recommendations...................... 58
9.1 VCC Pin Capacitor.................................................. 58
9.2 Boot Capacitor ........................................................ 58
9.3 RVCC Pin Capacitor ............................................... 59
10 Layout................................................................... 60
10.1 Layout Guidelines ................................................. 60
10.2 Layout Example .................................................... 60
11 Device and Documentation Support ................. 61
11.1 Device Support...................................................... 61
11.2 Documentation Support (if applicable).................. 61
11.3 Receiving Notification of Documentation Updates 61
11.4 Community Resources.......................................... 61
11.5 Trademarks ........................................................... 61
11.6 Electrostatic Discharge Caution ............................ 61
11.7 Glossary ................................................................ 62
12 Mechanical, Packaging, and Orderable
Information ........................................................... 62
2 Submit Documentation Feedback
Product Folder Links: UCC256303
Copyright © 2017–2019, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity UCC256303 SLUSD49A – SEPTEMBE R 2017 – REVISED JANUARY 2019 UCC2563 03 LLC Resonant Controller Enabling Ult ra-Low Standby Power 1 Features •1 H ybrid Hysteretic Control (HHC) – Best -in-Class Transient Response – Easy C ompensation Design • Optimized Low Po wer 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 Mo de • Improved Capacitive Region Avoid ance Scheme • Adaptive Dead-Time • Internal High-Side Gate Drivers (0.6-A and 1.2-A Capability) • Robust Soft S tart with No Hard Switching • Over Te mperature, Output Over Voltage, Input O ver and Under Voltage Protection with T hree Levels of Over Current Protections • Wide Operating Frequency Range (35 kHz to 1 MHz) • LLC Resonant Control ler in SOIC16 with High Voltage Clearance • External Bias Required • Create a Custom Design Usi.
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