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UCC28070 Datasheet PFC Controller

Manufacturer: Texas Instruments

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General Description

The UCC28070 is an advanced power factor correction (PFC) device that integrates two pulsewidth modulators (PWMs) operating 180° out of phase.

This interleaved PWM operation generates substantial reduction in the input and output ripple currents, allowing the conducted-EMI filtering to become 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, lowdistortion, sinusoidal input-line current.

Overview

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design UCC28070 SLUS794F – NOVEMBER 2007 – REVISED APRIL 2016 UCC28070 Interleaving Continuous Conduction Mode PFC.

Key Features

  • 1 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 from 30 kHz to 300 kHz.
  • Programmable Maximum Duty-Cycle Clamp.
  • Programmable Frequency-Dithering Rate and Magnitude for Enhanced EMI Reduction.
  • Magnitude: 3 kH.

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