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UC1854A - ADVANCED HIGH-POWER FACTOR PREREGULATOR

Description

The UC3854A/B products are pin compatible enhanced versions of the UC3854.

Like the UC3854, these products provide all of the functions necessary for active power factor corrected preregulators.

Features

  • 1.
  • Controls Boost PWM to Near-Unity Power Factor.
  • Limits Line Current Distortion To.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
www.ti.com UC1854A UC2854A, UC2854B UC3854A, UC3854B SLUS329E – MONTH 2003 – REVISED JANUARY 2008 ADVANCED HIGH-POWER FACTOR PREREGULATOR FEATURES 1 • Controls Boost PWM to Near-Unity Power Factor • Limits Line Current Distortion To <3% • World-Wide Operation Without Switches • Accurate Power Limiting • Fixed-Frequency Average Current-Mode Control • High Bandwidth (5 MHz), Low-Offset Current Amplifier • Integrated Current- and Voltage-Amplifier Output Clamps • Multiplier Improvements: Linearity, 500 mV VAC Offset (Eliminates External Resistor), 0 V to 5 V Multout Common-Mode Range • VREF GOOD Comparator • Faster and Improved Accuracy ENABLE Comparator • UVLO Options (16 V/10 V or 10.5 V/10 V) • 300-µA Start-Up Supply Current BLOCK DIAGRAM VCC (A) 16 V / 10 V (B) 10.
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