UC3855A
UC3855A is High Performance Power Factor Preregulator manufactured by UNITRODE.
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 pensator 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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