Automotive two-phase interleaved continuous conduction(CCM) mode PFC controller


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 Automotive qualified, Feed-forward correction for near unity PF, Frequency dithering for enhanced EMI reduction, Programable switching frequency, Programmable soft-start, Synchronizable Rating Automotive 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


  • Qualified for Automotive Applications
  • 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
  • Programmable Frequency (30 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 Correction
  • Programmable Peak Current Limiting
  • Bias-Supply UVLO, Over-Voltage Protection, Open-Loop Detection,
    and PFC-Enable Monitoring
  • External PFC-Disable Interface
  • Open-Circuit Protection on VSENSE and VINAC pins
  • Programmable Soft Start
  • 20-Lead TSSOP Package

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The UCC28070 is an advanced power factor correction device that integrates two pulse-width modulators (PWMs) operating 180° out of phase. This interleaved PWM operation generates substantial reduction in the input and output ripple currents, and the conducted-EMI filtering becomes easier and less expensive. A significantly improved multiplier design provides a shared current reference to two independent current amplifiers that ensures matched average current mode control in both PWM outputs while maintaining a stable, low-distortion sinusoidal input line current.

The UCC28070 contains multiple innovations including current synthesis and quantized voltage feed-forward 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.

The UCC28070 also contains a variety of protection features including output over-voltage detection, programmable peak-current limit, under-voltage lockout, and open-loop protection.

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Technical documentation

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Type Title Date
* Data sheet UCC28070-Q1 Interleaving Continuous Conduction Mode PFC Controller. datasheet (Rev. A) Jun. 30, 2011
Application note PFC Design Choice for On Board Charger Designs May 24, 2018
Application note Reducing Switching Losses in On-Board Chargers for Electric Vehicles Mar. 27, 2018
Technical article Hybrid electric vehicles and electric vehicles need different isolated DC/DCs to win Dec. 27, 2017
Technical article Are you on-board? Demystifying EV charging systems Jul. 31, 2017

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

SLUC667.ZIP (217 KB)

CAD/CAE symbols

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TSSOP (PW) 20 View options

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