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/69/935451221784036.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">NCP1653+NCP1396 LLC方案问题,向各位高手求教(附图)
在下有使用NCP1653+NCP1396做一个200W的适配器(24V/8.5A),LLC变压器用的是ETD39卧式,LM=500uH/LS=125uH/CS=22NF,NCP1653 PFC部份工作是正常的,但是后面LLC NCP1396怎么也工作不起来,上下桥的启动波形乱跳,当把第6脚FB拉到第8脚FAST FAULT的保护电阻取掉后输出电压跑到30多伏,这个时候上下桥的启动波形是趋于正常了,频率高达450K,一开就得关,如果长时间开30秒后就会将上下MOS都炸掉,还有NCP1396,如附档为在没有取掉保护电阻时候的波形,还有附电路图!请各位高手多指点! 935451221783959.pdf 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/69/935451221784036.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">
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/69/935451221784036.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">全部回复(43)
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@xhd668
不错!等待高手进来!顶!!
可是各位大侠好像不是很愿意分享,支持一下吧!上传一张取掉PIN6到PIN8保护电阻的启动波形,
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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/69/935451221814883.jpg');}" onmousewheel="return imgzoom(this);"> 0
