Natural interleaving transition-mode PFC controller with audible noise immunity


Product details


Topology Boost Control mode TM Practical operating frequency (Max) (MHz) 0.5 UVLO thresholds on/off (V) 12.6/10.4 Device type Controllers Operating supply current (mA) 5 Features > 750W Applications, Enable, Interleaved, OVP, Peak Current Mode, Transition Control Mode, Interleaved Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Power factor correction (PFC) controllers

Package | Pins | Size

SOIC (D) 16 59 mm² 9.9 x 6 open-in-new Find other Power factor correction (PFC) controllers


    • Easy Phase Management Facilitates Compliance to Light-Load Efficient Standards
    • FailSafe OVP with Dual Paths Prevents Output Over-Voltage Conditions Caused by Voltage-Sensing Failures
    • Sensorless Current Shaping Simplifies Board Layout and Improves Efficiency
    • Inrush Safe Current Limiting:
      • Prevents MOSFET conduction during inrush
      • Eliminates reverse recovery events in output rectifiers
    • Improved Audible Noise Performance
    • Soft Start on Overvoltage
    • Integrated Brownout
    • Improved Efficiency and Design Flexibility over Traditional, Single-Phase Continuous Conduction Mode (CCM)
    • Input Filter and Output Capacitor Current Cancellation:
      • Reduced current ripple for higher system reliability and smaller bulk capacitor
      • Reduced EMI filter size
    • Enables Use of Low-Cost Diodes without Extensive Snubber Circuitry
    • Improved Light-Load Efficiency
    • Improved Transient Response
    • Complete System-Level Protection
    • 1-A Source/1.8-A Sink Gate Drivers
    • 100-W to 800-W Power Supplies
    • Gaming
    • D to A Set Top Boxes
    • Adapters
    • LCD, Plasma and DLP TVs
    • Home Audio Systems

DLP is a trademark of Texas Instruments.
Natural Interleaving is a trademark of Texas Instuments.

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Optimized for consumer applications concerned with audible noise elimination, this solution extends the advantages of transition mode—high efficiency with low-cost components—to higher power ratings than previously possible. By utilizing a Natural Interleaving technique, both channels operate as masters (that is, there is no slave channel) synchronized to the same frequency. This approach delivers inherently strong matching, faster responses, and ensures that each channel operates in transition mode.

Complete system-level protections feature input brownout, output over-voltage, open-loop, overload, soft-start, phase-fail detection, and thermal shutdown. The additional FailSafe over-voltage protection (OVP) feature protects against shorts to an intermediate voltage that, if undetected, could lead to catastrophic device failure.

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Technical documentation

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Type Title Date
* Data sheet Natural Interleaving Transition-Mode PFC Controller for 80 PLUS and ENERGY STAR datasheet (Rev. A) Apr. 29, 2009
Application note UCC2806x PCB Layout Guideline for PFC Apr. 29, 2019
White paper An Interleaved PFC Preregulator for High-Power Converters Apr. 28, 2015
User guide A 600-W Input, Isolated PFC Power Supply for AVR Amplifiers. (Rev. C) Sep. 20, 2012
Application note Using External Soft Start Circuit for UCC2806x Mar. 23, 2011
Application note A 300-W, Universal Input, Isolated PFC Power Supply for LCD TV Applications (Rev. B) Mar. 19, 2009
User guide UCC28061 300W PFC Pre-Regulator Evaluation Module May 06, 2008

Design & development

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Hardware development

document-generic User guide

The UCC28061 is a dual-phase, transition-mode Power Factor Correction (PFC) pre-regulator. The UCC28061EVM is an evaluation module (EVM) with a 390-V, 300-W, dc output that operates from a universal input of 85 VRMS to 265 VRMS and provides power-factor correction. The pre-regulator uses the (...)

Reference designs

95VAC-305VAC 460W Interleaved TM PFC
PMP5194 — The PMP5194 reference design uses the UCC28061 interleaved transition mode PFC controller to convert a universal AC input to a 460V/1A DC bus. This design achieves a peak efficiency of over 96%.

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