如題
方案已經(jīng)換了2個(gè)了,可是都出現(xiàn)同樣的問(wèn)題,各位高手高高手,能否指點(diǎn)下迷津,幫我想想大概是哪里出的問(wèn)題
使用3843做DC/DC升壓(非隔離)電路,總是帶載電壓偏低
全部回復(fù)(6)
正序查看
倒序查看
@mskkk
你圖都沒(méi)有,叫人怎么想到你哪錯(cuò)了,估計(jì)只有神才能想到...
電路如下,各位幫幫忙看看,順便指點(diǎn)下
3Q~~~
500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/83/2609131257992831.jpg');}" onmousewheel="return imgzoom(this);">
3Q~~~
500) {this.resized=true; this.width=500; this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/83/2609131257992831.jpg');}" onmousewheel="return imgzoom(this);"> 0
回復(fù)
@thunderliu
電路如下,各位幫幫忙看看,順便指點(diǎn)下3Q~~~[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/83/2609131257992831.jpg');}"onmousewheel="returnimgzoom(this);">
我做3854也是這樣,可否考慮用圖騰柱式將輸出拉升?
0
回復(fù)
@thunderliu
電路如下,各位幫幫忙看看,順便指點(diǎn)下3Q~~~[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/83/2609131257992831.jpg');}"onmousewheel="returnimgzoom(this);">
用示波器看看是不是反饋出了問(wèn)題,duty張不開(kāi)而導(dǎo)致的.
0
回復(fù)
@thunderliu
電路如下,各位幫幫忙看看,順便指點(diǎn)下3Q~~~[圖片]500){this.resized=true;this.width=500;this.alt='這是一張縮略圖，點(diǎn)擊可放大。\n按住CTRL，滾動(dòng)鼠標(biāo)滾輪可自由縮放';this.style.cursor='hand'}"onclick="if(!this.resized){returntrue;}else{window.open('http://u.dianyuan.com/bbs/u/83/2609131257992831.jpg');}"onmousewheel="returnimgzoom(this);">
還有加大輸入電容試試,可能供電問(wèn)題.
0
回復(fù)
