Datasheet Summary
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 mon Mode Range
- VREF "GOOD" parator
- Faster and Improved Accuracy ENABLE parator
- UVLO Threshold Options (16/10V / 10.5/10V)
- 300µA Startup Supply Current
UVLO Turn on UVLO Turn off
UC1854A
16V...
