Fairchild FAN9611 300W交叉双BCM PFC电源解决方案

Fairchild 公司的FAN9611/12是交叉双边界导通模式(BCM)功率因素修正(PFC)控制器,能以180度相移控制两个并联连接的功率链,控制功率从300W到800W.转换器的开关频率在16.5kHz和525kHz间,起动电流80uA,主要用在100-1000W AC/DC电源,大屏幕LCD-TV,PDP-TV和RP-TV电源,高效台式计算机和服务器电源,网络和通信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,典型应用电路图,以及FAN9611 300W交叉双BCM小尺寸PFC评估板主要特性,电路图,材料清单和PCB元件布局图和尖峰电流限制电路图.

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.
..

查看全文