{"type":"product","schema_version":"1.0","item_id":"100135948743","canonical_url":"https://tw.bid.yahoo.com/item/100135948743","title":"《德源科技》r)LM317 LM337 直流可調穩壓電源板正負可調穩壓電源板套件 (成品)","subtitle":null,"condition":"全新品","currency":"TWD","observed_at":"2026-05-02T20:32:04.962Z","current_price":402,"original_price":null,"stock_status":"in_stock","available_quantity":10,"sold_quantity":4,"seller":{"id":"Y9895025221","name":"Deryuan 德源科技","positive_rate":null,"rating_count":null},"images":[{"url":"https://img.yec.tw/ob/image/7c6b5a5b-c516-4e76-90cc-edf8e49d8544.jpg","role":"main","alt":"商品主圖","width":null,"height":null},{"url":"https://img.yec.tw/ob/image/d396c38c-5874-421b-b515-e071ba95a7aa.jpg","role":"detail","alt":"商品圖片 2","width":null,"height":null}],"description":"16128\n\n \n備註：PCB套件和成品板為焊接到PCB上的零件，不包含其它零件。套件中電容為進口電容，因為供貨不穩定性，會使用不同品牌進口電容。\n\n具體零件請參考上圖，電路原理為LM317/337穩壓電路，具體請看電路原理圖，PCB規格為FR4 雙面40X80MM 非常的小，適合小空間安裝。\n\nLM317 337 直流可調穩壓電源板設計特點及其電氣特性：\n\n線路設計特點：\n\n    1）整流部分採用獨立4個整流二極管，每個二極管上並聯有一個抗干擾電容，可以防止有用信號（通常是高頻信號）和電源工頻信號（50赫茲）在整流二極管上產生相互調製，從而產生干擾信號，干擾機器的正常工作，消除“調製交流聲”，從根源上為後面的電路消除乾擾源。（如果不加這個抗干擾電容，如用在信號放大電路上，有很大機會把信號放大板做成收音機）\n\n2）線路板的PCB LAYOUT 設計， 整個線路板一點接地，即使多個儀器和線路共用一片電源板，都不會產生電源地線環路，沒有地線環路，就不會產生交流聲。從源頭解決地線環路問題。（淘寶上很多商家都沒有這樣設計，導致很多信號放大設備和儀器根本沒有辦法使用，只能用在一般電路上）\n\n電氣特性：\n\n輸入：三線交流雙28V以下\n\n可調整輸出電壓低到1.2V。保證1.5A 輸出電流。\n\n典型線性調整率0.01%。典型負載調整率0.1%。80dB紋波抑制比。\n\n輸出短路保護。過流、過熱保護。\n\n電壓輸出範圍：1.25V 至30V 正負電壓連續可調。","shipping_methods":[{"name":"郵局掛號","fee":0,"currency":"TWD"},{"name":"7-ELEVEN取貨付款","fee":0,"currency":"TWD"},{"name":"7-ELEVEN取貨不付款","fee":0,"currency":"TWD"}],"lowest_shipping_fee":null,"payment_methods":["ATM轉帳","7-ELEVEN取貨付款"],"category_id":"2092072544","category_name":"其他電腦周邊","breadcrumb":[{"id":"23336","name":"電腦、平板與周邊","url":"/tw/%E9%9B%BB%E8%85%A6%E3%80%81%E5%B9%B3%E6%9D%BF%E8%88%87%E5%91%A8%E9%82%8A-23336-category.html"},{"id":"2092072522","name":"電腦/筆電周邊","url":"/tw/%E9%9B%BB%E8%85%A6-%E7%AD%86%E9%9B%BB%E5%91%A8%E9%82%8A-2092072522-category.html"},{"id":"2092072544","name":"其他電腦周邊","url":"/tw/%E5%85%B6%E4%BB%96%E9%9B%BB%E8%85%A6%E5%91%A8%E9%82%8A-2092072544-category.html"}],"view_count":2,"watch_count":2}