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/54/1753131182184873.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">最新后级短路保护电路.一只可控硅和一只三极管组成!!
大家讨论一下电路!!这电路是串在后级输出电路中的!R.C怎么定阻值?
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@12v供电的虫
同意第五贴的说法,当R1点的电压达到0.7V后,三极管导通,但是导通后呢?所有的电流流过NPN,至少也有3-5A,三极管会烧坏.那么,到底是怎样一个保护呢,请高手分析.
接上一贴,在试验一个产品的短路功能,电路如下,请高手帮忙分析一下各工作原理.
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