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Product details

Parameters

Topology Half-Bridge, Resonant LLC Control method Current VCC (Min) (V) 11.25 VCC (Max) (V) 30 Duty cycle (Max) (%) 50 Frequency (Max) (kHz) 1000 Operating temperature range (C) -40 to 125 Gate drive (Typ) (A) 0.6 Features Integrated Gate Drivers, Light Load Efficiency, Supports external bias, Thermal Shutdown 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

  • 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

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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.

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Exact equivalent in functionality and parametrics to the compared device:
NEW UCC256403 ACTIVE LLC resonant controller with ultra-low power and ultra-quiet standby operation This product is the next generation update with enhanced features ie. light load mode and adaptive deadtime control.

Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet UCC256303 LLC Resonant Controller Enabling Ultra-Low Standby Power datasheet (Rev. A) Jan. 07, 2019
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
Application notes Exceeding Modern Energy Standards with 'Always On' PFC and LLC Controllers​ (Rev. B) Aug. 01, 2019
Application notes Improving ZVS and efficiency in LLC converters Nov. 05, 2018
User guides Using UCC25630-1EVM-291 (Rev. B) Jan. 30, 2018
Application notes UCC25630x Practical Design Guidelines (Rev. A) Dec. 08, 2017
Application notes AC Ripple Rejection in AC/DC Systems Using LLC Oct. 31, 2017
Selection guides UCC25630x Selection Guide Aug. 29, 2017

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
Description

UCC25630-1EVM-291 is an EVM of LLC resonant half-bridge DC-DC power converter with LLC controller UCC256301. UCC25630-1EVM-291 accepts DC line input from 340Vdc to 410Vdc, AC input voltage from 85 VAC to 264 VAC, and outputs nominal 12Vdc with full load output power 120W, or full output current 10A (...)

Features
  • Optimized low power features enable extreme low standby power
  • Advanced burst mode with adaptive threshold
  • Improved capacitive region avoidance scheme
  • Adaptive dead-time
  • X-capacitor discharge

Design tools & simulation

SIMULATION MODELS Download
SLUM601.ZIP (110 KB) - SIMPLIS Model
SIMULATION TOOLS Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
CALCULATION TOOLS Download
SLUC634B.ZIP (358 KB)

Reference designs

REFERENCE DESIGNS Download
LLC Resonant Converter Control Card Reference Design
PMP40281 — This reference design is a a control card for LLC converter. It integrates all of the essential functions for controlling a 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 converter to (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOIC (DDB) 14 View options

Ordering & quality

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