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UC1854A

Texas Instruments
Part Number UC1854A
Manufacturer Texas Instruments
Description ADVANCED HIGH-POWER FACTOR PREREGULATOR
Published Apr 21, 2020
Detailed Description www.ti.com UC1854A UC2854A, UC2854B UC3854A, UC3854B SLUS329E – MONTH 2003 – REVISED JANUARY 2008 ADVANCED HIGH-POWER F...
Datasheet PDF File UC1854A PDF File

UC1854A
UC1854A

Overview
www.
ti.
com UC1854A UC2854A, UC2854B UC3854A, UC3854B SLUS329E – MONTH 2003 – REVISED JANUARY 2008 ADVANCED HIGH-POWER FACTOR PREREGULATOR FEATURES 1 • 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 (5 MHz), Low-Offset Current Amplifier • Integrated Current- and Voltage-Amplifier Output Clamps • Multiplier Improvements: Linearity, 500 mV VAC Offset (Eliminates External Resistor), 0 V to 5 V Multout Common-Mode Range • VREF GOOD Comparator • Faster and Improved Accuracy ENABLE Comparator • UVLO Options (16 V/10 V or 10.
5 V/10 V) • 300-µA Start-Up Supply Current BLOCK DIAGRAM VCC (A) 16 V / 10 V (B) 10.
5 V / 10 V ENA 10 2.
65 V / 2.
15 V 3V VSENSE 11 IAC 6 VRMS 8 SS 13 14 µA VAO 7 MOUT 5 A B X2 C IMOUT + A C B DESCRIPTION The UC3854A/B products are pin compatible enhanced versions of the UC3854.
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