DN458降壓轉(zhuǎn)換器簡化低電壓設(shè)計(jì)
所屬分類：電路圖
上傳者：serena
標(biāo)簽： 降壓轉(zhuǎn)換器 DN458
所需積分：1分積分不夠怎么辦？
文檔介紹： Many system designers need an easy way to producea negative 3.3V power supply. In systems that alreadyhave a transformer, one option is to swap out the existingtransformer with one that has an additional secondarywinding. The problem with this solution is that manysystems now use transformers that are standard, offthe-shelf components, and most designers want toavoid replacing a standard, qualifi ed transformer with acustom version. An easier alternative is to produce thelow negative voltage rail by stepping down an existingnegative rail. For example, if the system already employsan off-the-shelf transformer with two secondary windingsto produce 12V, and a 3.3V rail is needed, a negativebuck converter can produce the 3.3V output from the12V rail.
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