490NRP25300模塊
隨著電子技術(shù)進(jìn)入農(nóng)業(yè)和所有重型工業(yè)車輛，對(duì)寬輸入范圍和堅(jiān)固結(jié)構(gòu)的要求也是一樣的。道路車輛的電源電壓是非常明確的，由德國(guó)汽車制造商在2013年制定的LV124是12V系統(tǒng)的通用標(biāo)準(zhǔn)。圖3為常見(jiàn)的電壓，轉(zhuǎn)換器需要在超過(guò)4: 1輸入范圍內(nèi)可靠工作。雖然不同的制造商有自己的解釋和要求，但標(biāo)準(zhǔn)ISO 7637-2也適用于高壓瞬態(tài)?？梢允┘痈哌_(dá)-150V負(fù)瞬態(tài)持續(xù)2ms以及正電壓如+150V持續(xù)150ns。負(fù)脈沖是由并聯(lián)電感負(fù)載斷電所產(chǎn)生的。瞬態(tài)具有相對(duì)較低的能量，可以使用LC濾波器和瞬態(tài)抑制器加以減弱。
490NRP25300模塊人們?cè)絹?lái)越關(guān)注混合動(dòng)力汽車的48V DC系統(tǒng)，因?yàn)榧磳⒃?021年實(shí)施的法規(guī)要求新登記的乘用車的二氧化碳排放需低于每公里95克。那時(shí)市場(chǎng)還無(wú)法轉(zhuǎn)換成全電動(dòng)車，因此混合動(dòng)力車是大型車輛的唯一選擇。具有12V和48V系統(tǒng)電壓的系統(tǒng)可以提供更好的燃料消耗和排放，48V電池可在必要時(shí)提供牽引力，并為油泵和水泵等周邊設(shè)備供電，這在設(shè)備為電驅(qū)動(dòng)時(shí)效率更高。
48V系統(tǒng)具有與12V系統(tǒng)類似的欠壓和過(guò)壓百分比范圍，但需要考慮將電壓保持在安全的60V水平以避免額外的昂貴絕緣系統(tǒng)。如果在這些系統(tǒng)中使用DC/DC轉(zhuǎn)換器模塊，對(duì)于信息娛樂(lè)或?qū)Ш綉?yīng)用，4:1（18-72V）輸入范圍可能就足夠了，但該模塊仍必須能夠承受沖擊和振動(dòng)的規(guī)范，以及車輛停放在寒冷的北極或炎熱的熱帶所帶來(lái)的極大溫差。
模塊化DC/DC轉(zhuǎn)換器需要符合交通運(yùn)輸系統(tǒng)的應(yīng)用規(guī)范
交通運(yùn)輸對(duì)DC/DC轉(zhuǎn)換器的要求可以輕松地由具有長(zhǎng)期市場(chǎng)經(jīng)驗(yàn)的RECOM及姊妹公司PCS的現(xiàn)成解決方案滿足。廣泛的產(chǎn)品包括在鐵路應(yīng)用中符合EN 50155標(biāo)準(zhǔn)的超寬12:1輸入的模塊，以及適用于汽車和工業(yè)車輛的堅(jiān)固耐用的轉(zhuǎn)換器。為了確保使用壽命和最佳性能以及滿足苛刻應(yīng)用的要求，RECOM的產(chǎn)品通過(guò)了全面的設(shè)計(jì)驗(yàn)證和測(cè)試，包括全部的電性能、HALT、溫度循環(huán)和高溫老化。AC/DC轉(zhuǎn)換器需要高級(jí)別的防觸電保護(hù)的原因顯而易見(jiàn)，如果手術(shù)期間沒(méi)有高級(jí)別的防觸電保護(hù)，高壓交流電可能會(huì)直接接觸到患者、甚至是患者器官，形成致命的安全隱患。醫(yī)療安全標(biāo)準(zhǔn)為操作員和患者明確地定義了兩個(gè)等級(jí)的隔離或保護(hù)措施（MOP）。
the voltage drop between its input and output is less than 50mV.
Parallel function to realize load balancing
The improved MOSFET redundant module scheme can even make the parallel mode achieve a more ideal thermal equilibrium effect, which can further extend the service life of products. In this process, the load current between each power supply is evenly distributed.
There are two ways to realize the parallel function in the system: directly integrate the parallel mode in the power supply itself, or integrate it in the redundant module. The former, that is, in the integration of power supply, the output voltage will be adjusted to be about 4% higher than the rated load when no-load. Therefore, as long as the no-load voltage between devices is the same, the current will be automatically distributed. If a power supply bears more current, its voltage will automatically decrease and the current balance can be maintained. Such characteristics ensure that there is no power loss in the current distribution. The latter, that is, the parallel mode is integrated in the redundant module, and the MOSFET is connected in series. In order to realize the current balance between two channels (i.e. two power supplies), they will produce an appropriate voltage drop under the higher voltage of the channel. This method can also make the power supply without integrated parallel mode used in parallel. In Pursh redundant module yr20.245, an innovative technology is added: hot plug. This is also the first hot plug function on redundant modules.
