Two-Phase Interleaved CCM PFC Controller with Extended Frequency Range (10kHz to 300kHz) - UCC28070A


Two-Phase Interleaved CCM PFC Controller with Extended Frequency Range (10kHz to 300kHz)


The UCC28070A is an extended frequency range derivative of UCC28070, capable of operating at low switching frequencies desired for IGBT power switch based PFC converters in high power applications.

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


  • 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 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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Parametrics Compare all products in Power Factor Correction

Device Type
Control Method
UVLO Thresholds On/Off (V)
Operating Supply (Max) (V)
Operating Supply Current (mA)
Approx. Price (US$)
Operating Temperature Range (C)
Special Features
Interleaved PFC    
1.95 | 1ku    
-40 to 125    
> 750W Applications
Average Current Mode

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