建設(shè)高降壓比降壓轉(zhuǎn)換器的許多選擇

　　設(shè)計(jì)高降壓比DC / DC電源轉(zhuǎn)換器的轉(zhuǎn)換是不平凡的，特別是當(dāng)from 48 VDC輸出和輸入到3.3伏以下，因?yàn)楦呙芏鹊男屎妥钚〉木S護(hù)成本是個(gè)挑戰(zhàn)。這樣的DC / DC電源轉(zhuǎn)換器are primarily needed in通信系統(tǒng)和數(shù)據(jù)中心populated with computers with現(xiàn)代DSP板，FPGA，ASIC voltages and ranging from 3.3 V和要求較低。to avoid大廈高降壓比Buck變換器中，利用總線轉(zhuǎn)換器designers have been to further down the步流行的總線電壓48 VDC in such Systems to level of中間電壓12 V或24 V，低。adding that is to another降壓階段，從而簡(jiǎn)化分布式電源架構(gòu)的設(shè)計(jì)。This has been adding to the cost and Space of the system while also reducing the overall板效率的性能。

　　多年來(lái)，為了消除中間功率轉(zhuǎn)換階段，一些制造商已經(jīng)交付了這樣的高階比轉(zhuǎn)換器的高效率和密度，以犧牲更高的成本。例如，Vicor結(jié)合其硅砌塊如PRM和VTM模塊產(chǎn)生一個(gè)孤立的DC / DC解決方案，以48伏直流母線電壓并將其轉(zhuǎn)換為低處理器的核心電壓在1 V與英特爾的vr12.0和VR12.5本規(guī)。最近，Vicor擴(kuò)大其導(dǎo)頻控制泛音再現(xiàn)酷家庭的高密度，隔離直流/直流零電壓開(kāi)關(guān)（ZVS）變換器模塊的新成員提供48 V輸入和3.3 V輸出在18的這樣的一個(gè)例子是pi3101-00-hviz。

　　At the same time Efficient Power Conversion （EPC） has demonstrated a 48 V to 1.2 V non-isolated buck converter using its enhancement-mode gallium nitride （eGaN） FETs2. EPC’s initial demonstration incorporated first-generation 100 V eGaN FETs like EPC1001 and EPC1007 to enable a non-isolated buck converter capable of operating from 48 V input and generating low output of 1.2 V. The new-generation versions like EPC2001 and EPC2007 can offer further improvement in efficiency with higher reliability and cost competitiveness， according to the