wangweidei：
我用ST063AC做個(gè)5V升12V的電路,用來(lái)驅(qū)動(dòng)步進(jìn)電機(jī).所用器件如下:電路原理圖[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/64/2476561207060466.jpg');}"onmousewheel="returnimgzoom(this);">名稱說(shuō)明數(shù)量封裝芯片ST063AC1SOP8電容22UF1個(gè)1206電容0.1UF1個(gè)1206電容33UF1個(gè)1206電阻0.5(OHM)1個(gè)0805電阻220(OHM)1個(gè)0805電阻1.8K1個(gè)0805電阻16K1個(gè)0805電感120UH1個(gè)1812結(jié)果輸出為幾MV(無(wú)負(fù)載時(shí)測(cè)的),電感燙得把焊錫都融了...求教高手,是原理圖出問(wèn)題了,還是元器件的大小有問(wèn)題呢?輸入電壓為5V,有一定紋波PP值是200MV這樣.[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/64/2476561207061440.jpg');}"onmousewheel="returnimgzoom(this);">