On Semi FAN9672交替两路CCM PFC控制器解决方案
On Semi公司的FAN9672是用于PFC预调节的交替两路连续导通模式(CCM)功率因速修正( PFC)控制器.所采用电路包括上升沿,平均电流和”升”型功率因素修正,FAN9672可使电源设计完全和IEC1000−3−2指标兼容.交替操作使得输入和输出波纹电流大大地降低,导通的EMI滤波变得更简单和更有效果.器件具有PFC从通路管理功能,可编的工作频率范围18 kHz ∼ 40 kHz或55 kHz ∼ 75 kHz,可编PFC输出电压,具有双路电流限制功能,可编软起动, 电压暂降与短时中断减缓保护,欠压锁住(UVLO),差分电流检测,32引脚LQFP封装.主要用在大功率AC/DC电源,DC马达电源,白色家电如空调电源,服务器和通信设备电源,UPS和工业焊接和电源.本文介绍了FAN9672主要特性,功能框图和应用电路,以及3.3 kW APM OBC演示板测试报告和主要指标, 评估板主要特性和主板,LLC控制板和模拟控制板电路图,材料清单和PCB设计图.
The FAN9672 is an interleaved two−channel ContinuousConduction Mode (CCM) Power Factor Correction (PFC) controllerIC intended for PFC pre−regulators. Incorporating circuits for leadingedge, average current, and “boost”−type power factor correction; the
FAN9672 enables the design of a power supply that fully complieswith the IEC1000−3−2 specification. Interleaved operation providessubstantial reduction in the input and output ripple currents and theconducted EMI filtering becomes simpler and cost effective.
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