MC34063 24V轉(zhuǎn)5V電路,dc24 to dc5v power converter
近來(lái)由于一個(gè)客戶(hù)要求幫其做一批公共汽車(chē)下站提醒器所以要用到24V轉(zhuǎn)5V的電路但成本要求很低.開(kāi)始想過(guò)用LM7805的但LM7805輸入電壓做不到24V且大電流的價(jià)格也在5毛錢(qián)以上所以放棄了,后選用MC34063做,原以為成本會(huì)很高但做出來(lái)發(fā)現(xiàn)成本不高.效率還可以且輸入電壓30V內(nèi)沒(méi)有問(wèn)題,正好合適應(yīng)用在產(chǎn)品上.
下面是大概的元件成本:
34063(1.2A):0.28;
1N5819:0.05;
7X8直插電感220uH:0.1;
兩個(gè)電解電容:0.05;
幾個(gè)電阻:0.05;
共:0.63;
下面是我用的電路圖:
-
電路圖
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