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/49/1169197660.gif');}" onmousewheel="return imgzoom(this);">1169270529.sch提供一个AC220供电输出DC15V,DC5V的精妙设计(单片)
现有变频控制设计中,从AC220转换为低压控制电源通常需要开关变压器或功频变压器.该设计仅单片设计(VIPer12),为简易应用提供实用方案.该方案最大供电电流:200mA.电源不隔离.如需要隔离需外加B15XX,或使用MAX845解决隔离问题.该设计成本很低,体积极小.
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/49/1169197660.gif');}" onmousewheel="return imgzoom(this);">1169270529.sch
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/49/1169197660.gif');}" onmousewheel="return imgzoom(this);">1169270529.sch