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/36/1134453287.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">請教各位前輩一個問題:LM3485外加MOSFET如何輸出到3.3V/3A電流
請教各位前輩,小弟現正在做一個新MODEL的電源電路,要求輸出3.3V,3A電流,用的是LM3485方案,可是按下圖做的電路輪出不到3A電流,隻能穩定的輸出1.5A左右的電流,如輸出3A則不是燒LM3485就是燒MOSFET FDS9435,但9435是5A的管子,電路裡面22UH的電感也是電流為5A的,二級管835L也是5A的管子,請各位前輩高手幫忙看看是哪裡出了問題,要改動哪裡才能達到3A電流輸出,先謝謝各位啦
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