PFC电感电流尖峰

1500W功率的PFC电路,采用IR1150,升压二极管后电压保持电容由原来的470uF*4压缩成470uF*2,MOS采用FMH25N50G,驱动电阻Rg100欧姆,电感输出电流出现比较大的尖峰.原来4个电容的时候电感输出电流为图1(绿色),改成2个电容后为图2.请高手们帮我分析下500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/80/3419791251089839.gif');}" onmousewheel="return imgzoom(this);">图一  
500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/80/3419791251089907.gif');}" onmousewheel="return imgzoom(this);">图2