UCC256404

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

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Product details

Parameters

Topology Half-Bridge, Resonant LLC Control method Current VCC (Min) (V) 13 VCC (Max) (V) 30 Duty cycle (Max) (%) 50 Operating temperature range (C) -40 to 125 Gate drive (Typ) (A) 0.6 Features HV Start-up, Light Load Efficiency, Low Power, Wide AC input, X cap discharge integrated, Zero Voltage Switching Rating Catalog open-in-new Find other PWM controllers & resonant controllers

Package | Pins | Size

SOIC (DDB) 14 59 mm² 9.9 x 6 open-in-new Find other PWM controllers & resonant controllers

Features

  • 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

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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.

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Technical documentation

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No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet UCC25640x LLC Resonant Controller with Ultra-Low Audible Noise and Standby Power datasheet (Rev. C) Mar. 12, 2020
Technical articles How to reduce audible noise and power consumption at standby in your AC/DC design Apr. 22, 2020
More literature UCC256404 IEC60065 Certification Apr. 10, 2020
More literature UCC256404 IEC60950 Certification Feb. 19, 2020
More literature UCC256404 IEC62368 Certification Feb. 19, 2020
Application notes Migrating to UCC25640x from UCC25630x (Rev. A) Dec. 10, 2019
Application notes Improving Transient Response in LLC Converters Using Hybrid Hysteretic Control (Rev. A) Oct. 22, 2019

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$175.00
Description
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.
Features
  • Optimized burst mode function for low audible noise and low standby power
  • Integrated high voltage startup and integrated gate drivers reducing total BOM count
  • Robust protection features including overvoltage, overcurrent and zero current switching detection
  • X capacitor discharge function

Software development

SUPPORT SOFTWARE Download
SLUC675B.ZIP (212 KB)

Design tools & simulation

SIMULATION MODELS Download
SLUM684.ZIP (178 KB) - SIMPLIS Model

Reference designs

REFERENCE DESIGNS Download
180-W universal input PFC + LLC TV power supply reference design
PMP40580 — 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
93% Efficiency, 400-W AC/DC reference design for avionics
PMP30763 — 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 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
336-W Auxless AC/DC power supply reference design with 80 PLUS platinum compatible performance
PMP22087 — 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 controller (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
LLC Resonant converter control card reference design
PMP22088 — 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOIC (DDB) 14 View options

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Videos

LLC Resonant Controller: Achieve a new low in standby power

Watch this video to learn more about how the UCC25640x, new family of LLC resonant controllers, can impact the cumulative world power consumption.

Posted: 19-Jan-2017
Duration: 02:14

Learn more about UCC256301

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