8-pin high-performance resonant mode LLC controller


Product details


Topology Half-Bridge, Resonant LLC Control method Voltage Supply voltage (Max) (V) 18 Supply voltage (Min) (V) 11 Duty cycle (Max) (%) 50 Frequency (Max) (kHz) 350 Operating temperature range (C) -40 to 125 Gate drive (Typ) (A) 0.8 Features Thermal Shutdown Rating Catalog open-in-new Find other PWM controllers & resonant controllers

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 open-in-new Find other PWM controllers & resonant controllers


  • Variable Switching Frequency Control
  • Programmable Minimum Switching Frequency
    With 4% Accuracy (3% Accuracy at Temperature
    Range: –20°C to 105°C)
  • Programmable Maximum Switching Frequency
  • Programmable Dead Time for Best Efficiency
  • Programmable Soft-Start Time
  • Easy ON and OFF Control
  • Overcurrent Protection
  • Overtemperature Protection
  • Bias Voltage UVLO and Overvoltage Protection
  • Integrated Gate Driver With 0.4-A Source and 0.8-
    A Sink Capability
  • Operating Temperature Range: –40°C to 125°C
  • SOIC 8-Pin Package
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The UCC25600 high performance, resonant mode controller is designed for dc-to-dc applications using resonant topologies, especially the LLC half-bridge resonant converter. This highly integrated controller implements frequency modulation control and complete system functions in only an 8-pin package. Switching to the UCC25600 will greatly simplify the system design and layout, and improve time to market, all at a price point lower than competitive 16-pin device offerings.

The internal oscillator supports the switching frequencies from 40 kHz to 350 kHz. This high-accuracy oscillator realizes the minimum switching frequency limiting with 4% tolerance, allowing the designer to avoid over-design of the power stage and, thus, further reducing overall system cost. The programmable dead time enables zero-voltage switching with minimum magnetizing current. This maximizes system efficiency across a variety of applications. The programmable soft-start timer maximizes design flexibility demanded by the varied requirements of end equipment using a half-bridge topology. By incorporating a 0.4-A source and 0.8-A sink driving capability, a low cost, reliable gate driver transformer is a real option.

The UCC25600 delivers complete system protection functions including overcurrent, UVLO, bias supply OVP, and overtemperature protection.

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Technical documentation

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Type Title Date
* Data sheet UCC25600 8-Pin High-Performance Resonant Mode Controller datasheet (Rev. C) Jul. 02, 2015
User guide LLC Resonant Half Bridge Converter 300 W Evaluation Module (Rev. A) Nov. 15, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
White paper LLC Converter Small Signal Modeling Oct. 02, 2015
White paper LLC Converter Small Signal Modeling (PPT) Oct. 02, 2015
Technical article Power Tips: Why is your LLC resonant converter frequency way, way off Sep. 27, 2015
Technical article MHz isolated power supply - we are at the inflection point Dec. 14, 2013
Application note Analysis and Measurement of Resonant Tank Current on LLC Jul. 30, 2013
User guide A 600-W Input, Isolated PFC Power Supply for AVR Amplifiers. (Rev. C) Sep. 20, 2012
More literature Designing an LLC Resonant Half-Bridge Power Converter Jul. 26, 2011
Application note High-Efficiency AC-DC TV Power Solutions: An Intelligent LED Backlight Scheme Jul. 15, 2011
Application note Feedback Loop Design of an LLC Resonant Power Converter (Rev. A) Nov. 24, 2010
User guide A 90-W High-Efficiency, LLC Series-Resonant Converter Nov. 03, 2010
User guide Isolated 240W Offline LED Driver Reference Design Using UCC28810, UCC28811, and Jun. 10, 2010
Application note A 300-W, Universal Input, Isolated PFC Power Supply for LCD TV Applications (Rev. B) Mar. 19, 2009

Design & development

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

Hardware development

document-generic User guide

The UCC25600 evaluation module, EVM (HPA341), is a 300 W LLC resonant half-bridge converter, providing a regulated output voltage nominally at 12 V at maximum 300 W of load power with reinforced isolation of AC-DC off-line application between the primary and the secondary, operating (...)

  • 300 W Output Power Rating
  • High Efficiency 92% Peak and Over 91% at Full Load
  • Regulated Output Nominal of 12 V
  • Input DC Voltage of 390 V
  • Plenty of Test Points to Facilitate the Device Evaluation
  • Over-Current Protection
  • Output Over-Voltage Protection
  • Burst Operation at Light Load

Design tools & simulation

SLUM401.ZIP (98 KB) - PSpice Model
SLUM425.TSC (262 KB) - TINA-TI Reference Design
SLUM426.ZIP (34 KB) - TINA-TI Spice Model
Free Tool: Design Calculation Tool for Converters using UCC25600
UCC25600-DESIGN-CALC The UCC25600 Design Tool is an Excel Spreadsheet based calculation sheet to help design an LLC half bridge converter using UCC25600. The tool helps design the power stage and program the IC setup parameters. The power stage design includes resonant tank, primary and secondary switches and magnetic (...)
SLUC146.ZIP (175 KB)

Reference designs

Many TI reference designs include the UCC25600 Use our reference design selection tool to review and identify designs that best match your application and parameters.

CAD/CAE symbols

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SOIC (D) 8 View options

Ordering & quality

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