Two-phase Interleaved CCM PFC controller with Extended Frequency Range (10kHz to 300kHz)


Product details


Device type Interleaved PFC Control method CCM Operating supply (Max) (V) 21 Operating supply current (mA) 20 UVLO thresholds on/off (V) 10.2/9.2 Features > 750W Applications, Average Current Mode, Interleaved, OVP, Programable switching frequency Rating Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Power factor correction (PFC) controllers

Package | Pins | Size

TSSOP (PW) 20 42 mm² 6.5 x 6.4 open-in-new Find other Power factor correction (PFC) controllers


  • Interleaved Average Current-Mode PWM Control
    With Inherent Current Matching
  • Advanced Current Synthesizer Current Sensing
    for Superior Efficiency
  • Highly-Linear Multiplier Output With Internal
    Quantized Voltage Feed-Forward Correction for
    Near-Unity PF
  • Extended Range Programmable Frequency
    (10 kHz to 300 kHz)
  • Programmable Maximum Duty-Cycle Clamp
  • Programmable Frequency Dithering Rate and
    Magnitude for Enhanced EMI Reduction
    • Magnitude: 3 kHz to 30 kHz
    • Rate: Up to 30 kHz
  • External Clock Synchronization Capability
  • Enhanced Load and Line Transient Response
    through Voltage Amplifier Output Slew-Rate
  • Programmable Peak Current Limiting
  • Bias-Supply UVLO, Overvoltage Protection,
    Open-Loop Detection, and PFC-Enable Monitoring
  • External PFC-Disable Interface
  • Open-Circuit Protection on VSENSE and
    VINAC pins
  • Programmable Soft Start
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The UCC28070A device is an extended frequency range derivative of the UCC28070 device, capable of operating at low switching frequencies desired for IGBT power-switch based PFC converters in high-power applications.

The UCC28070A device is capable of operating at frequencies from 10 kHz to 300 kHz, thus extending the range of operation compared to the UCC28070 device whose minimum operating frequency was limited to 30 kHz. All the other features and benefits of the UCC28070 device are also available in the UCC28070A device. The 180° out-of-phase interleaved operation generates substantial reduction in input and output ripple currents and conducted EMI filtering becomes easier and less expensive.

Like the UCC28070 device, the UCC28070A device also features multiple innovations including current synthesis and quantized voltage feedforward to promote performance enhancements in PF, efficiency, THD, and transient response. Features including frequency dithering, clock synchronization, and slew rate enhancement further expand the potential performance enhancements. All protection features in the UCC28070 device such as output overvoltage detection, programmable peak-current limit, undervoltage lockout, and open-loop protection are available in the UCC28070A device as well.

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Technical documentation

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Type Title Date
* Datasheet UCC28070A Extended Frequency Range (10 kHz to 300 kHz), Interleaving Continuous Conduction Mode PFC Controller datasheet (Rev. A) May 03, 2016
Application note UCC2806x PCB Layout Guideline for PFC Apr. 29, 2019
White paper Advancing Power Supply Solutions Through the Promise of GaN Feb. 24, 2015
More literature Design Review of a Full-Featured 350-W Offline Power Converter Oct. 29, 2013
Application note UCC28070 Implement Bridgeless PFC Pre-Regulator Design Jun. 18, 2009
User guide UCC28070, 300-W Interleaved PFC Pre-Regulator (Rev. B) May 12, 2009

Design & development

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Hardware development

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

SLUM097.ZIP (76 KB) - PSpice Model
SLUM098.ZIP (210 KB) - PSpice Model
SLUC114A.ZIP (302 KB)
SLUC110.ZIP (227 KB)
SLUC111.ZIP (178 KB)
SLUC667.ZIP (217 KB)

CAD/CAE symbols

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TSSOP (PW) 20 View options

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