UCC28070
Overview
The UCC28070 is an advanced power factor correction (PFC) device that integrates two pulsewidth modulators (PWMs) operating 180° out of phase. This interleaved PWM operation generates substantial reduction in the input and output ripple currents, allowing the conducted-EMI filtering to become easier and less expensive.
- 1 Interleaved Average Current-Mode PWM Control With Inherent Current Matching
- Advanced Current Synthesizer Current Sensing for Superior Efficiency
- Highly-Linear Multiplier Output With Internal Quantized Voltage Feed-Forward Correction for Near-Unity PF
- Programmable Frequency from 30 kHz to 300 kHz
- Programmable Maximum Duty-Cycle Clamp
- Programmable Frequency-Dithering Rate and Magnitude for Enhanced EMI Reduction - Magnitude: 3 kHz to 30 kHz - Rate: Up to 30 kHz
- External-Clock Synchronization Capability
- Enhanced Load and Line Transient Response through Voltage Amplifier Output Slew-Rate Correction
- Programmable Peak Current Limiting
- Bias-Supply UVLO, Overvoltage Protection, OpenLoop Detection, and PFC-Enable Monitoring
