The UCC28070 is an advanced power factor correction (PFC) device that integrates two pulse-width 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. A significantly improved multiplier design provides a shared current reference to two independent current amplifiers that ensures matched average-current mode control in both PWM outputs while maintaining a stable, low-distortion, sinusoidal input-line current.

The UCC28070 device contains multiple innovations including current synthesis and quantized voltage feed-forward to promote performance enhancements in PF, efficiency, THD, and transient response. Features including frequency dithering, clock synchronization, and slew rate enhancement further expand the potential performance enhancements.

The UCC28070 device also contains a variety of protection features including output-overvoltage detection, programmable peak-current limit, undervoltage lockout, and open-loop protection.

• 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, Open- Loop Detection, and PFC-Enable Monitoring
• External PFC-Disable Interface
• Open-Circuit Protection on VSENSE and VINAC pins
• Programmable Soft-Start

• Topology
• Boost
• Control mode
• CCM
• Practical operating frequency (Max) (MHz)
• 0.3
• UVLO thresholds on/off (V)
• 10.2/9.2
• Device type
• Controllers
• Operating supply current (mA)
• 20
• Features
• > 750W Applications, Average Current Mode, Continuous Control Mode , Interleaved, OVP, Programable Switching Frequency, Interleaved
• Rating
• Catalog
• Operating temperature range (C)
• -40 to 125, -40 to 85

UCC28070的完整型号有：UCC28070DW、UCC28070DWR、UCC28070PW、UCC28070PWR，以下是这些产品的关键参数及官网采购报价：

UCC28070DW，工作温度：-40 to 85，封装：SOIC (DW)-20，包装数量MPQ：25个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC28070DW的批量USD价格：1.626（1000+）

UCC28070DWR，工作温度：-40 to 85，封装：SOIC (DW)-20，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC28070DWR的批量USD价格：1.355（1000+）

UCC28070PW，工作温度：-40 to 125，封装：TSSOP (PW)-20，包装数量MPQ：70个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC28070PW的批量USD价格：1.626（1000+）

UCC28070PWR，工作温度：-40 to 125，封装：TSSOP (PW)-20，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网UCC28070PWR的批量USD价格：1.355（1000+）

UCC28070EVM — UCC28070 评估模块

UCC28070 评估模块是使用平均电流模式控制技术以达到临近单位功率因数的 300W、二相交错 PFC 前置稳压器。前置稳压器设计为在通用 AC 线路输入电压为 85V 至 265V 的范围内运行，并提供 390V 稳压 DC 输出。此评估模块演示了 TI 的交错 PFC 控制技术。

UCC28070 PSpice Start-up Simulation Using Average Model

该参考设计是一款无桥 PFC 电路，该电路使用 UCC28070 交错式 CCM PFC 控制器通过通用交流输入提供 390V/2A 输出。该电路使用平均电流模式 PWM 控制和先进的内部电流合成器进行电流检测。该设计在 115VAC/60Hz 输入下可实现 96.57% 的峰值效率，在 230VAC/50Hz 输入下可实现 98.07% 的峰值效率。在 115VAC 和 230VAC 输入下，满负载时的功率因数高于 0.994。低高度 (<25mm) 设计使该电路适用于电视和电器应用。

PMP5568 — 350W 高性能、高速电源

该项目是一个完整的 350W、高性能、高速离线电源解决方案。它包含一个由微控制器驱动的新颖同步桥接整流器、一个两相交错 PFC 阶段以及一个作为降压转换器的相移全桥。它具有通用输入（85 至 265V AC），且输出电压可在 12V 至 14V 之间调节。连续输出电流为 25A，峰值电流为 27A。第二台微控制器可监控多个值（输入电压、PFC 电压、输出电压、输出电流、温度）、可作为用户界面（LCD、按钮）、可调节输出电压并同步所有转换器的开关频率。