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UC3855B

Part Number	UC3855B
Manufacturer	UNITRODE
Description	High Performance Power Factor Preregulator
Published	Apr 21, 2020
Detailed Description	High Performance Power Factor Preregulator application INFO available UC2855A/B UC3855A/B FEATURES • Controls Boost P...
Datasheet	UC3855B PDF File

Overview

High Performance Power Factor Preregulator application INFO available UC2855A/B UC3855A/B FEATURES • 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 (5MHz), Low Offset Current Amplifier • Overvoltage and Overcurrent protection • Two UVLO Threshold Options • 150µA Startup Supply Current Typical • ...

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