Natural interleaved dual-phase transition-mode PFC controller


Product details


Device type Interleaved PFC Control method TM Operating supply (Max) (V) 21 Operating supply current (mA) 5 UVLO thresholds on/off (V) 12.6/10.4 Features > 750W Applications, Enable, Interleaved, OVP, Transition Mode Control 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


Optimized for high-volume consumer applications, 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.

open-in-new Find other Power factor correction (PFC) controllers

Technical documentation

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Type Title Date
* Datasheet Natural Interleaving™ Dual-Phase Transition-Mode PFC Controller datasheet (Rev. E) Feb. 20, 2008
Application note UCC2806x PCB Layout Guideline for PFC Apr. 29, 2019
White paper An Interleaved PFC Preregulator for High-Power Converters Apr. 28, 2015
Application note LED Driver Based on UCC28060 Interleaved ACDC Single Stage Flyback Oct. 19, 2011
Application note Using External Soft Start Circuit for UCC2806x Mar. 23, 2011
User guide UCC28060 300W Interleaved PFC Pre-Requlator User's Guide (Rev. B) Jul. 11, 2008
User guide A 600-W Interleaved Dual-Phase Transition Mode PFC Converter (Rev. A) Apr. 29, 2008

Design & development

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Hardware development

document-generic User guide

The UCC28060 is a dual-phase, transition-mode Power Factor Correction (PFC) pre-regulator. The UCC28060EVM is an evaluation module 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 UCC28060 PFC (...)

document-generic User guide
The UCC28070 evaluation module is a 300W, two-phase interleaved, PFC pre-regulator that uses average current mode control techniques to achieve near unity power factor. The pre-regulator was designed to operate off a universal ac line input of 85V to 265V and provides a regulated 390V dc output (...)

Design tools & simulation

SLUC072B.ZIP (132 KB)

CAD/CAE symbols

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SOIC (D) 16 View options

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