UCC28070中文资料两相交错式连续导通模式 (CCM) PFC 控制器数据手册TI规格书

描述 Description

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.

特性 Features

• 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

简介

UCC28070属于集成电路（IC）的PFC（功率因数校正）。由TI制造生产的UCC28070PFC（功率因数校正）功率因数校正 (PFC) 是用于调整交流电路中的电压和电流之间的相位角，使之趋近于零的半导体器件。不同模式包括平均电流、边界导通、连续导通、临界导通、电流控制式频率折返、不连续和不连续导通，开关频率从 6 kHz 至 1.7 MHz 可调。