UC3855B, UC3855A - High Performance Power Factor Preregulator

UNITRODE

Datasheet Details

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

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 |