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/29/1116126771.gif');}" onmousewheel="return imgzoom(this);">不知为啥:MC34063按照芯片资料上接法连接怎么不行啊??
请问各位大虾:它的外围元件参数哪个是要严格一致的啊,就是说哪个可以稍微的改动一点,哪个是不允许改动的.它的工作原理是咋回事啊.我现在晕,不知道它升压的原理.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/29/1116126771.gif');}" 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/29/1116126771.gif');}" onmousewheel="return imgzoom(this);">