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您现在的位置是:虫虫源码 > 其他 > DN458降压转换器简化低电压设计

DN458降压转换器简化低电压设计

  • 资源大小:65 K
  • 上传时间:2023-10-27
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  • 资源积分:1积分
  • 标      签: 458 DN 降压转换器 低电压

资 源 简 介

  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 the–12V rail.

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