Home Power management AC/DC & isolated DC/DC switching regulators LLC controllers

UCC256404

ACTIVE

LLC resonant controller with ultra-low power, ultra-quiet standby operation and high voltage startup

A newer version of this product is available

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Same functionality with different pin-out to the compared device
NEW UCC25660 ACTIVE Wide-VIN/VOUT 750-kHz LLC controller Capable of higher operating frequency and supports wider VIN/VOUT operation

Product details

Control mode Current Features High voltage gate driver integrated, High voltage startup, Hybrid hysteretic control, Light load efficiency, Low power, Wide AC input, X capacacitor discharge integrated, Zero voltage switching Vin (min) (V) 13 Vin (max) (V) 30 Operating temperature range (°C) -40 to 125 Topology Half bridge, LLC Rating Catalog
Control mode Current Features High voltage gate driver integrated, High voltage startup, Hybrid hysteretic control, Light load efficiency, Low power, Wide AC input, X capacacitor discharge integrated, Zero voltage switching Vin (min) (V) 13 Vin (max) (V) 30 Operating temperature range (°C) -40 to 125 Topology Half bridge, LLC Rating Catalog
SOIC (DDB) 14 59.4 mm² 9.9 x 6
  • 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
  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet UCC25640x LLC Resonant Controller with Ultra-Low Audible Noise and Standby Power datasheet (Rev. E) PDF | HTML 19 Feb 2021
Technical article 在完整運作條件下進行測試之前測量您的 LLC 諧振電路 PDF | HTML 21 Mar 2024
Technical article 전체 작동 조건에서 테스트하기 전에 LLC 공진 탱크 측정 PDF | HTML 21 Mar 2024
Technical article 音訊放大器的 LLC 設計考量 PDF | HTML 13 Mar 2024
Technical article 오디오 증폭기를 위한 LLC 설계 고려 사항 PDF | HTML 13 Mar 2024
Technical article Measure your LLC resonant tank before testing at full operating conditions PDF | HTML 21 Feb 2024
Technical article LLC design considerations for audio amplifiers PDF | HTML 19 Dec 2023
Application note Most Frequently Asked Questions About the UCC25640x LLC Resonant Controller PDF | HTML 05 Jun 2023
Application note UCC25640x LLC Resonant Controller Features Brief Overview and Bring up Guideline PDF | HTML 20 Jun 2022
Application note Improving Transient Response in LLC Converters Using Hybrid Hysteretic Control (Rev. B) 07 Apr 2021
Technical article How to reduce audible noise and power consumption at standby in your AC/DC design PDF | HTML 22 Apr 2020
Certificate UCC256404 IEC60065 Certification 10 Apr 2020
Certificate UCC256404 IEC60950 Certification 19 Feb 2020
Certificate UCC256404 IEC62368 Certification 19 Feb 2020
Application note Migrating to UCC25640x from UCC25630x (Rev. A) 10 Dec 2019
EVM User's guide PFCLLCSREVM-034 User Guide 26 Jul 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

PFCLLCSREVM034 — AC to isolated DC EVM with UCC28056B, UCC256404 and UCC24624

PFCLLCSREVM034 is a 168-W AC/DC supply with a transition-mode power-factor-correction front end and isolated half-bridge LLC resonant converter with synchronous rectification. This EVM accepts AC input from 90 Vrms to 264 Vrms and outputs 12-V DC with 168-W full-load output power.

User guide: PDF
Not available on TI.com
Evaluation board

UCC25640EVM-020 — UCC25640x half bridge LLC evaluation module

UCC25640EVM-020 is a 180W, LLC resonant converter using UCC256404. This EVM accepts DC input from 360V to 410V, AC input voltage from 85VAC to 264VAC and outputs 12VDC with 180W full load output power.
User guide: PDF
Not available on TI.com
Simulation model

UCC25640x Simplis Model

SLUM684.ZIP (178 KB) - SIMPLIS Model
Calculation tool

SLUC675 UCC25640x Design Calculator

Supported products & hardware

Supported products & hardware

Products
LLC controllers
UCC256402 LLC resonant controller with ultra-low standby power and high voltage startup UCC256403 LLC resonant controller with ultra-low power and ultra-quiet standby operation UCC256404 LLC resonant controller with ultra-low power, ultra-quiet standby operation and high voltage startup
Reference designs

PMP40580 — 180-W universal input PFC + LLC TV power supply reference design

This AC to DC power supply design for TV application provides 12-V, 5-A and 150-V, 0.8-A output from universal AC voltage (90 Vac to 264 Vac). The design uses CRM/DCM PFC controller UCC28056, and LLC controller UCC256404 with enhanced burst mode which enabled for low standby power and smaller (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP31179 — 400-W AC/DC reference design for avionics

This is a compact, 30-V DC, 400-W reference design for avionics applications that works with mains frequency between 400 Hz and 800 Hz. A two-phase interleaved transition mode (TM) power factor correction (PFC) based on UCC28064A is used to correct power factor and minimizes harmonic content of (...)
Test report: PDF
Reference designs

PMP30763 — 93% Efficiency, 400-W AC/DC reference design for avionics

This is a compact, 30-V DC, 400-W reference design for avionics applications, accepting main frequencies between 400 Hz and 800 Hz. This design consists of a front-end, two-phase interleaved transition mode (TM) power factor correction (PFC) based on UCC28064A. This minimizes the PFC inductor size (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP22087 — 336-W Auxless AC/DC power supply reference design with 80 PLUS platinum compatible performance

This reference design is an AC/DC power supply design with critical conduction mode (CRM) PFC and half-bridge LLC series resonant converter that provides 24 V, 240-W continuous, 336-W peak output from a universal input AC voltage (90 VAC to 264 VAC). This design uses UCC28056 CRM/DCM PFC (...)
Test report: PDF
Schematic: PDF
Reference designs

PMP22088 — LLC Resonant converter control card reference design

This reference design is a control card for an LLC converter and integrates all of the essential functions for controlling an LLC converter, including the HV start-up, X-capacitor discharge and the drivers for the power FETs. By employing the advanced burst mode, it can also help the LLC (...)
Test report: PDF
Schematic: PDF
Package Pins Download
SOIC (DDB) 14 View options

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