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UC3854A - Enhanced High Power Factor Preregulator

General Description

The UC1854A/B products are pin compatible enhanced versions of the UC1854.

Like the UC1854, these products provide all of the functions necessary for active power factor corrected preregulators.

Key Features

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

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Datasheet Details

Part number UC3854A
Manufacturer UNITRODE
File Size 185.76 KB
Description Enhanced High Power Factor Preregulator
Datasheet download datasheet UC3854A Datasheet

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Other Datasheets by UNITRODE

Part Number Description
UC3854B Enhanced High Power Factor Preregulator
UC3851 PWM Controller
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UC3855A High Performance Power Factor Preregulator

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
Enhanced High Power Factor Preregulator UC1854A/B UC2854A/B UC3854A/B FEATURES • 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 (5MHz), Low Offset Current Amplifier • Integrated Current and Voltage Amp Output Clamps • Multiplier Improvements: Linearity, 500mV VAC Offset (eliminates external resistor), 0-5V Multout Common Mode Range • VREF "GOOD" Comparator • Faster and Improved Accuracy ENABLE Comparator • UVLO Threshold Options (16/10V / 10.5/10V) • 300µA Startup Supply Current UVLO Turn on UVLO Turn off UC1854A 16V 10V UC1854B 10.