UC3842做的开关电源,空载时变压器有响声
如题,带载后就没有了响声,附上原理图,各路高手帮忙看看,变压器的电感是0.5mH 1198361257319746.pdf
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怎么没人回呢?是不是控制回路有问题呢?
空载时,4脚的波形
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空载时,4脚的波形
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/83/1198361257392014.jpg');}" onmousewheel="return imgzoom(this);">6脚空载的波形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/83/1198361257392033.jpg');}" onmousewheel="return imgzoom(this);"> 0
