UC3855B - High Performance Power Factor Preregulator

Product Overview

UNITRODE

Part number	UC3855B
Manufacturer	UNITRODE
File Size	1.28 MB
Description	High Performance Power Factor Preregulator
Datasheet	UC3855B Datasheet
Note	This datasheet PDF includes multiple part numbers: UC3855B, UC3855A. Please refer to the document for exact specifications by model.
Additional preview pages of the UC3855B datasheet.

The UC3855A/B provides all the control

Controls Boost PWM to Near Unity Power Factor.
Fixed Frequency Average Current Mode Control Minimizes Line Current Distortion.
Built-in Active Snubber (ZVT) allows Operation to 500kHz, improved EMI and Efficiency.
Inductor Current Synthesizer allows Single Current Transformer Current Sense for Improved Efficiency and Noise Margin.
Accurate Analog Multiplier with Line Compensator allows for Universal Input Voltage Operation.
High Bandwidth (5.

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Published: Apr 21, 2020 |