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/51/1175345190.gif');}" onmousewheel="return imgzoom(this);">LM2576低温下输出电压偏低,求教?
48V输入12V输出的DC/DC电源,其它都正常,就是在-25℃工作时输出电压只有7V左右,恢复到常温就OK,有经验的朋友请指教,谢谢!
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