UC1854B Overview
The UC1854A/B products are pin patible 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 input line current waveform to correspond to the AC input line voltage.
UC1854B Key Features
- Controls Boost PWM to Near Unity
- 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
