Natural Interleaving™ transition-mode PFC controller with high light-load efficiency


Product details


Topology Boost Control mode TM Practical operating frequency (Max) (MHz) 0.5 UVLO thresholds on/off (V) 10.35 / 9.6 Device type Controllers Operating supply current (mA) 5 Features < 150W Applications, > 750W Applications, Burst mode , Feed-forward Correction, Interleaved, Low Power, Soft Start, 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


  • Input filter and output capacitor ripple-current reduction
    • Reduced current ripple for higher system reliability and smaller bulk capacitor
    • Reduced EMI filter size
  • High light-load efficiency
    • User adjustable phase management with input voltage compensation
    • Burst mode operation with adjustable burst threshold
    • Helps enable compliance to EUP Lot6 Tier II, CoC Tier II and DOE Level VI standards
  • Sensorless current-shaping simplifies board layout and improves efficiency
  • Input line feed-forward for fast line transient response
  • Inrush-safe current limiting:
    • Prevents MOSFET conduction during inrush
    • Eliminates CCM operation and reverse recovery events in output rectifier
  • Operating temperature range –40°C to +125°C in a 16-pin SOIC package
  • Create a Custom Design Using the UCC28064A With the WEBENCH® Power Designer
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The UCC28064A interleaved PFC controller has higher power ratings than previously possible. The device uses a Natural Interleaving™ technique. Both channels operate as masters (there is no slave channel) synchronized to the same frequency. This approach enables faster response time, excellent phase-to-phase on-time matching, and transition mode operation for each channel. The device has a burst mode function to get high light-load efficiency. Burst mode eliminates the need to turn off the PFC during light load operation to meet standby power targets. Burst mode eliminates the need for an auxiliary flyback converter when paired with UCC25630x LLC controller and the UCC24624 synchronous rectifier controller.

Expanded system level protections features include input brownout and dropout recovery, output over-voltage, open-loop, overload, soft-start, phase-fail detection, and thermal shutdown. The additional fail-safe over-voltage protection (OVP) feature protects against shorts to an intermediate voltage that, if undetected, could lead to catastrophic device failure. Advanced non-linear gain results in rapid, yet smooth response to line and load transient events. Special line-dropout handling avoids significant current disruption. Strong reduction of bias current when not switching during burst mode operation, improves stand-by performance.

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Technical documentation

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Type Title Date
* Data sheet UCC28064A Natural Interleaving™ Transition-Mode PFC Controller with High Light-Load Efficiency datasheet (Rev. B) Oct. 03, 2019
Application note Connecting Two UCC28064A Interleaved PFC Power Stages in Parallel Sep. 02, 2021
Application note Convert UCC28064A EVM to Higher Switching Frequency Using UCC28065 Jun. 04, 2020
Application note UCC2806x PCB Layout Guideline for PFC Apr. 29, 2019
Technical article How topology selection can help improve reliability in industrial AC/DC power supplies Feb. 14, 2019
Application note Addressing the Need for the Next-Generation Interleaved Transition Mode PFC (Rev. A) Oct. 11, 2018
Application note Optimizing PFC Standby Power Using the UCC28064A (Rev. A) Oct. 10, 2018
User guide UCC28064EVM-004 User's Guide (Rev. A) Jun. 22, 2018

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 pre-regulator uses the UCC28064 transition mode interleaved pfc controller to shape the input current wave to provide power factor correction. This device provides interleaved dual phase operation at high power levels, single phase operation at lower power levels and burst mode operation at very (...)
  • Interleaved transition mode pfc for high power application
  • Single phase operation for high efficiency at mid power levels
  • Burst mode operation for high efficiency at very low power levels
  • Line voltage feedforward for fast line transient response
  • Non-linear amplifier gain for fast dynamic response.

Design tools & simulation

SLUM658.ZIP (290 KB) - SIMPLIS Model
SLUC645C.ZIP (88 KB)

Reference designs

93% Efficiency, 400-W AC/DC reference design for avionics
PMP30763 — This is a compact, 30-V DC, 400-W reference design for avionics applications, accepting main frequencies between 400 Hz and 800 Hz. This design consists of a front-end, two-phase interleaved transition mode (TM) power factor correction (PFC) based on UCC28064A. This minimizes the PFC inductor size (...)
document-generic Schematic
94.5% Efficiency, 500W industrial AC-DC reference design
TIDA-010015 — This reference design is a compact, high efficiency, 24-V DC, 500-W reference design for industrial AC/DC power supplies. This design consists of a front-end, two-phase interleaved transition mode (TM) power factor correction (PFC) based on the UCC28064A. This minimizes the PFC inductor size and (...)
document-generic Schematic
700-W interleaving transition-mode PFC reference design
PMP21366 — This reference design uses a UCC28064A, Natural Interleaving(TM) transition-mode power factor correction (PFC) controller to provide a universal AC input to 380-V/700-W conversion. This design achieves 98% peak efficiency at the 230 VAC input and the light-load efficiency is maintained at a level (...)
document-generic Schematic

CAD/CAE symbols

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