Fairchild FAN9611 400W PFC电源解决方案

Fairchild公司的FAN9611/12是采用Sync-Lock™技术的交错边界导通模式(BCM) PFC控制器,大电流栅极驱动器可提供1.0A源电流和2.0A沉电流,提供输出功率从300W到大于800W,可工作在可变频率,开关频率在16.5kHz和525kHz之间,主要用在100W-1000W的AC/DC电源,大屏LCD TV,PDP TV和RP TV电源,高效率台式计算机和服务器电源,网络和通信设备电源以及太阳能微逆变器.本文介绍了FAN9611/12主要特性, 方框图和典型应用电路,以及400W交错式双BCM PFC控制器评估板主要特性和指标,电路图,材料清单(BOM)和PCB元件布局图.

FAN9611 / FAN9612: Interleaved Dual BCM PFC Controllers

The FAN9611/12 family of interleaved dual Boundary-Conduction-Mode (BCM) Power-Factor-Correction (PFC) controllers operate two parallel-connected boost power trains 180° out of phase. Interleaving extends the maximum practical power level of the control technique from about 300W to greater than 800W. Unlike the continuous conduction mode (CCM) technique often used at higher power levels, BCM offers inherent zerocurrent switching of the boost diodes, which permits the use of less expensive diodes without sacrificing efficiency. Furthermore, the input and output filters can be smaller due to ripple current cancellation and effective doubling of the switching frequency.
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