UCC256304

ACTIVE

Wide vin LLC resonant controller with high-voltage start up enabling low standby power

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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 Frequency (Max) (kHz) 1000 Operating temperature range (C) -40 to 125 Gate drive (Typ) (A) 0.6 Features HV Start-up, Integrated Gate Drivers, Light Load Efficiency, Thermal Shutdown, Wide AC input, Wide DC input, X cap discharge integrated Rating Catalog open-in-new Find other PWM controllers & resonant controllers

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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)
  • Nemko Certification for X Cap Discharge Function
  • Wide DC Input Range
  • Enables Wide AC Input Range
  • PFC Startup Not Required For LLC Startup
  • Create a Custom Design Using the UCC256304 With the WEBENCH® Power Designer

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Description

The UCC256304 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.UCC256304 uses hybrid hysteretic control to provide best in class line and load transient response. The control makes the open loop transfer function a first order system so that it’s very easy to compensate and is always stable with proper frequency compensation.

The UCC256304 is unique in that the controller is able to operate over a large DC input range. This is accomplished by making the input overvoltage sense threshold much larger than the input voltage start threshold. This allows the LLC to startup and enter a low power standby mode without the need to enable the PFC and enables the LLC to accommodate an extensive range of common AC inputs.

UCC256304 provides a highly 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.

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Exact equivalent in functionality and parametrics to the compared device:
NEW UCC256404 ACTIVE LLC resonant controller with ultra-low power, ultra-quiet standby operation and high voltage startup This product can be designed for enhanced performance across a wider operating input voltage range.

Technical documentation

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Type Title Date
* Datasheet UCC256304 Ultra Wide VIN LLC Resonant Controller Enabling Low Standby Power datasheet Oct. 04, 2017
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
More literature IEC60065 Certification Nov. 07, 2017
More literature IEC60950 Certification Nov. 07, 2017
More literature IEC62368 Certification Nov. 07, 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
SLUM596.ZIP (108 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
200kHz LLC Series Resonant Converter Reference Design With Low Standby Power Consumption
PMP20795 — The PMP20795 reference design uses UCC256301 enhanced LLC controller with integrated driver to provide 24V/12A output from a nominal 380VDC input. UCC256301 provides hybrid hysteresis control (HHC) to enable a fast transient response. In this design, a 1st order system with over 6kHz bandwidth is (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
250-W single-stage LLC converter with multiple outputs reference design
PMP40482 — This is a single-stage reference design converting AC input voltage 85-115-V AC to three isolated outputs - 12 V/7.5 A, 60 V/2.5 A, 25 V/0.4 A with one non-isolated output 21 V/0.15 A using the UCC256304 resonant controller. The design is for industrial applications and the bill of materials (BOM (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
93% Full-load efficiency (60% at 125mW), 310W industrial AC/DC reference design
PMP30521 — This reference design is a compact and high efficient two-stage power supply. The front-end stage is a CCM power factor correction (PFC) based on UCC28180.The second stage is based on UCC256304, which drives a resonant 310 W LLC converter with two outputs, 19 V and 56 V. The board does not need any (...)
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
PMP21160 — This reference design uses UCC28056 CRM/DCM PFC controller and UCC256304 enhanced LLC controller with integrated driver to provide 24-V/10-A output (continuous, 14-A peak) from universal AC input. This design achieves 92.8% peak efficiency at 115-Vac input and 94.9% peak efficiency at 230-Vac input (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
24-V, 480-W Nominal 720-W peak, >93.5% efficient, robust AC/DC industrial power supply reference
TIDA-01494 — The TIDA-01494 reference design is a compact, high efficiency, 24-V DC, 480-W nominal, 720-W peak output reference design for industrial AC/DC power supplies. The circuit consists of a front-end continuous conduction mode (CCM) power factor correction (PFC) circuit followed by a robust LLC stage (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Less than 90mW Ultra-low Standby Power Auxless AC-DC Power Supply Reference Design
PMP21251 — The PMP21251 reference design uses UCC28056 CRM/DCM PFC controller and UCC256304 enhanced LLC controller with integrated driver to provide 12V/10.8A output (continuous, 14.4A peak) from universal AC input. This design achieves 92.4% peak efficiency at 115VAC input and 94.0% peak efficiency at 230VAC (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
170W Auxless AC/DC Power Supply Reference Design with 80 PLUS Gold Compatible Performance
PMP21098 The PMP21098 reference design uses UCC28056 transition mode PFC controller and UCC25630 enhanced LLC controller with integrated driver to provide 12V/10.8A output (continuous, 14.2A peak) from universal AC input. This design achieves 91.8% peak efficiency at 115VAC input and 93.4% peak efficiency at (...)
document-generic Schematic document-generic User guide
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

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