產(chǎn)品詳情
實際應(yīng)用發(fā)現(xiàn),使用傳統(tǒng)的非隔離穩(wěn)壓電源供電的系統(tǒng),常常受到各種干擾,如浪涌、靜電等,導(dǎo)致電路不能正常工作或系統(tǒng)不穩(wěn)定、數(shù)據(jù)傳輸?shù)恼`碼率高,甚至出現(xiàn)故障損壞等。
為提高系統(tǒng)的穩(wěn)定性及可靠性,建議客戶在設(shè)計工控類產(chǎn)品的前級電源時,盡量選擇帶隔離的電源模塊;在工作環(huán)境較好,要求不高的場合,系統(tǒng)前級電源可選擇非隔離的電源模塊。
(2)方案推薦一:采用帶隔離的寬壓輸入電源模塊寬電壓輸入系列DC-DC模塊,轉(zhuǎn)換效率高,高低溫度特性好,帶容性負載能力強,具有完善的保護功能,可持續(xù)短路,標準引腳方式,UL94-V0阻燃封裝,自然冷卻,無需外加散熱片,無需外加元件可直接使用,可直接焊在PCB板上。電路結(jié)構(gòu)為閉環(huán)反饋系統(tǒng),內(nèi)部框圖如圖 1.1所示。特別適合于DC輸入的系統(tǒng)前級供電
不需要隔離措施,可選擇寬壓輸入非隔離輸出的電源模塊,其內(nèi)部框圖如圖1.3所示。使用時,根據(jù)實際需要,可在模塊的輸入端安裝絲、瞬態(tài)保護二極管和防止輸入電壓反接的保護二極管,可以有效防止電路反接、輸入瞬態(tài)過壓和因模塊失效造成輸入端的短路。建議絲選用熔斷時間小于10ms、額定電流大于2倍模塊輸入電流的慢速絲。
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HP StorageWorks MSA70 Direct Attached Storage NEW
CAN CUSTOMIZE WITH DRIVES - PLEASE CALL FOR DETAILS