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UCC256402

ACTIVE

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

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Data sheet

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NEW UCC25660 ACTIVE Wide VIN and VOUT 750kHz LLC controller Capable of higher operating frequency and supports wider VIN/VOUT operation

UCC256402

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 13 Vin (max) (V) 30 Operating temperature range (°C) -40 to 125 Control mode Current Topology Half bridge, LLC Rating Catalog Features HV Start-up, High voltage gate driver integrated, High voltage startup, Hybrid hysteretic control, LLC, Light load efficiency, Low power, Over Temperature Protection, Programmable soft start, Thermal shutdown, USB C/PD compatible, Zero voltage switching
Vin (min) (V) 13 Vin (max) (V) 30 Operating temperature range (°C) -40 to 125 Control mode Current Topology Half bridge, LLC Rating Catalog Features HV Start-up, High voltage gate driver integrated, High voltage startup, Hybrid hysteretic control, LLC, Light load efficiency, Low power, Over Temperature Protection, Programmable soft start, Thermal shutdown, USB C/PD compatible, Zero voltage switching
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
Application note UCC25640X Benefits in LED Lighting PSU PDF | HTML 04 Jan 2024
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
Application note Migrating to UCC25640x from UCC25630x (Rev. A) 10 Dec 2019
Application note Improving ZVS and efficiency in LLC converters 05 Nov 2018

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
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Calculation tool

SLUC675 — UCC25640x Design Calculator

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
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
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SOIC (DDB) 14 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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