UC3855B Overview
The UC3855A/B provides all the control.
UC3855B Key Features
- Controls Boost PWM to Near Unity
- 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
- Precision 1% 7.5V Reference