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UC1854 Datasheet High-Power Factor Preregulator

Manufacturer: Texas Instruments

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General Description

The UC1854 provides active-power factor correction for power systems that otherwise would draw nonsinusoidal current from sinusoidal power lines.

This device implements all the control functions necessary to build a power supply capable of optimally using available power-line current while minimizing linecurrent distortion.

To do this, the UC1854 contains a voltage amplifier, an analog multiplier and divider, a current amplifier, and a fixed-frequency PWM.

Overview

Product Folder Order Now Technical Documents Tools & Software Support & Community UC1854, UC2854, UC3854 SLUS336A – JUNE 1998 – REVISED DECEMBER 2016 UCx854 High-Power Factor Preregulator.

Key Features

  • 1 Control Boost PWM to 0.99 Power Factor.
  • Limit Line-Current Distortion to < 5%.
  • World-Wide Operation Without Switches.
  • Feedforward Line Regulation.
  • Average Current-Mode Control.
  • Low Noise Sensitivity.
  • Low Startup Supply Current.
  • Fixed-Frequency PWM Drive.
  • Low-Offset Analog Multiplier and Divider.
  • 1-A Totem-Pole Gate Driver.
  • Precision Voltage Reference 2.

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