UCC256403 Controller Datasheet

UCC256403 Datasheet, PDF, Equivalent


Part Number

UCC256403

Description

LLC Resonant Controller

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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UCC256403
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UCC256402, UCC256403, UCC256404
SLUSD90B – JUNE 2019 – REVISED NOVEMBER 2019
UCC25640x LLC Resonant Controller
with Ultra-Low Audible Noise and Standby Power
1 Features
1 Optimized low power mode and burst mode
algorithm
– Burst mode with Soft-ON and Soft-OFF
periods
– Minimized audible noise at no load and
standby
– User option to disable burst mode
– Opto-coupler low power operation
– Efficiency performance exceeds DoE level VI
and EU CoC Tier-2 External Power Supply
Standards
• Hybrid hysteretic control (HHC)
– Best-in-class transient response
– Fast exit from burst mode
• Robust adaptive dead-time control
• Integrated high-voltage gate driver with 0.6 A
source and 1.2 A sink capability
• Robust capacitive region (ZCS) avoidance
scheme
• Over temperature, output over voltage, input
under voltage protection, three levels
of over current protection
• Integrated high voltage startup function
• Active x-capacitor discharge function
2 Applications
• SMPS power supply for TV
• Lighting
• AC-DC adapter
• Power tools
• Medical power supply
• Multi-functional printer
• Enterprise and cinema projector
• PC power supply
• Gaming console power supply
3 Description
The UCC25640x is a fully featured LLC controller
with integrated high-voltage gate driver. It has been
designed to pair with a PFC controller 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.
UCC25640x provides a highly efficient burst mode
with soft-on and soft-off periods to minimize audible
noise at standby operation. The burst power level and
hysteresis are programmable, simplifying the
optimization of efficiency and burst mode operation.
Burst mode can also be disabled through pin
configuration. UCC25640x uses hybrid hysteretic
control to provide best in class line and load transient
response.
UCC25640x includes a range of features designed to
make LLC converter operation well controlled and
protected. It can be used with UCC28056 or
UCC28064A PFC controllers, along with UCC24624
synchronous rectifier controller to offer a complete
power supply solution.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
UCC256402
SOIC (14)
9.9 mm x 3.9 mm
UCC256403
SOIC (14)
9.9 mm x 3.9 mm
UCC256404
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
Lr
VCC
Cr
Lm
BW
LO
AC Line
AC Neutral
ISNS
1 HV
RHV
HS 16
HO 15
VCC 3 VCC
HB 14
BLK
4 BLK
UCC25640x
LLC
FB 5 FB
Controller
RVCC 12
FB
HS
HO
CBOOT
6 ISNS
GND 11
VCR 7 VCR
LO 10 LO
BW 8 BW
LL/SS 9
CSS
Vout
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.

UCC256403
UCC256402, UCC256403, UCC256404
SLUSD90B – JUNE 2019 – REVISED NOVEMBER 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Comparison Table..................................... 3
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5
7.2 ESD Ratings.............................................................. 5
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information .................................................. 6
7.5 Electrical Characteristics........................................... 6
7.6 Switching Characteristics ........................................ 10
7.7 Typical Characteristics ............................................ 11
8 Detailed Description ............................................ 16
8.1 Overview ................................................................. 16
8.2 Functional Block Diagram ....................................... 18
8.3 Feature Description................................................. 19
8.4 Device Functional Modes........................................ 33
9 Application and Implementation ........................ 47
9.1 Application Information............................................ 47
9.2 Typical Application ................................................. 47
10 Power Supply Recommendations ..................... 63
10.1 VCC Pin Capacitor................................................ 63
10.2 Boot Capacitor ...................................................... 63
10.3 RVCC Pin Capacitor ............................................. 64
11 Layout................................................................... 65
11.1 Layout Guidelines ................................................. 65
11.2 Layout Example .................................................... 66
12 Device and Documentation Support ................. 67
12.1 Documentation Support ....................................... 67
12.2 Related Links ........................................................ 67
12.3 Receiving Notification of Documentation Updates 67
12.4 Community Resources.......................................... 67
12.5 Trademarks ........................................................... 67
12.6 Electrostatic Discharge Caution ............................ 67
12.7 Glossary ................................................................ 67
13 Mechanical, Packaging, and Orderable
Information ........................................................... 67
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (August 2019) to Revision B
Page
• Changed marketing status from Advance Information to production data. ............................................................................ 1
2 Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
Product Folder Links: UCC256402 UCC256403 UCC256404


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity UCC256402, UCC256403, UCC256404 SLUSD90B – JUNE 2019 – REVISED NOV EMBER 2019 UCC25640x LLC Resonant Contr oller with Ultra-Low Audible Noise and Standby Power 1 Features •1 Optimize d low power mode and burst mode algorit hm – Burst mode with Soft-ON and Soft -OFF periods – Minimized audible nois e at no load and standby – User optio n to disable burst mode – Opto-couple r low power operation – Efficiency pe rformance exceeds DoE level VI and EU C oC Tier-2 External Power Supply Standar ds • Hybrid hysteretic control (HHC) – Best-in-class transient response Fast exit from burst mode • Robust adaptive dead-time control • Integrat ed high-voltage gate driver with 0.6 A source and 1.2 A sink capability • Ro bust capacitive region (ZCS) avoidance scheme • Over temperature, output ove r voltage, input under voltage protecti on, three levels of over current protection • Integrated high voltage startup function • Acti.
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