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UC3854B

UNITRODE
Part Number UC3854B
Manufacturer UNITRODE
Description Enhanced High Power Factor Preregulator
Published Oct 17, 2015
Detailed Description Enhanced High Power Factor Preregulator UC1854A/B UC2854A/B UC3854A/B FEATURES • Controls Boost PWM to Near Unity Powe...
Datasheet PDF File UC3854B PDF File

UC3854B
UC3854B

Overview
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.
5V 10V 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.
The controller achieves near unity power factor by shaping the AC inp...


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