双色球蓝球走势图

开关二极管

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防反接保护电路设计:选择二极管还是MOS管

防反接保护电路设计:选择二极管还是MOS管

发布日期:2019-12-23 作者: 点击:

FANGFANJIEWEIHUDIANLU

  通常情况下直流电源输入防反接维护电路是使用二极管双色球蓝球走势图的单向导电性来完成防反接维护。如图1一只串联二极管维护体系不受反向极性影响,二极管有0.7V的压降。

双色球蓝球走势图  ZHEIZHONGJIEFAJIANLVEKEKAO,DANDANGSHURUDADIANLIUDEQINGKUANGXIAGONGHAOYINGXIANGSHIFEICHANGDADE。YISHURUDIANLIUEDINGZHIDAODA2A,RUXUANYONGLXDEKUAISUHUIFUERJIGUANMUR3020PT,EDINGGUANYAJIANGWEI0.7V,NEIMEGONGHAOZHISHAOYEYAODAODA:Pd=2A×0.7V=1.4W,ZHEIYANGXIAOLVDI,FARELIANGDA,YAOJIASANREQI。

  别的还可以用二极管桥对输入做整流,这样电路就永久有正确的极性。如图2是一个桥式整流器双色球蓝球走势图,不论什么极性都可以正常工作,但是有两个二极管导通,功耗是图1的两倍。这些计划的缺点是,二极管上的压降会消耗能量。输入电流为2A时,图1中的电路功耗为1.4W,图2中电路的功耗为2.8W。

双色球蓝球走势图  SHIYONGMOSGUANDEKAIGUANTEXING,KONGZHIDIANLUDEDAOTONGHEDUANKAILAIGUIHUAFANGFANJIEWEIHUDIANLU,YINWEIGONGLVMOSGUANDENEIZUHENXIAO,CHULILEXIANYOUXUANYONGERJIGUANDIANYUANFANGFANJIEJIHUACUNZAIDEYAJIANGHEGONGHAOGUODADEWENTI。

双色球蓝球走势图  MOSGUANXINGFANGFANJIEWEIHUDIANLU

双色球蓝球走势图  TU3SHIYONGLEMOSGUANDEKAIGUANTEXING,KONGZHIDIANLUDEDAOTONGHEDUANKAILAIGUIHUAFANGFANJIEWEIHUDIANLU,YINWEIGONGLVMOSGUANDENEIZUHENXIAO,XIANZAIMOSFET Rds(on)XIANYINENGGOUZUODAOHAOOUJI,CHULILEXIANYOUXUANYONGERJIGUANDIANYUANFANGFANJIEJIHUACUNZAIDEYAJIANGHEGONGHAOGUODADEWENTI。

  JIXINGFANJIEWEIHUJIANGWEIHUYONGCHANGXIAOYINGGUANYUBEIWEIHUDIANLUCHUANLIANXIANJIE。WEIHUYONGCHANGXIAOYINGGUANWEIPMOSCHANGXIAOYINGGUANHUONMOSCHANGXIAOYINGGUAN。RUOWEIPMOS,QIZHAJIHEYUANJIBIELIXIANJIEBEIWEIHUDIANLUDEJIEDIDUANHEDIANYUANDUAN,QILOUJIXIANJIEBEIWEIHUDIANLUZHONGPMOSYUANJIANDECHENDI。RUOSHINMOS,QIZHAJIHEYUANJIBIELIXIANJIEBEIWEIHUDIANLUDEDIANYUANDUANHEJIEDIDUAN,QILOUJIXIANJIEBEIWEIHUDIANLUZHONGNMOSYUANJIANDECHENDI。

双色球蓝球走势图  YIDANBEIWEIHUDIANLUDEDIANYUANJIXINGFANJIE,WEIHUYONGCHANGXIAOYINGGUANHUIXINGCHENGDUANLU,BIMIANDIANLIUSHAOHUIDIANLUZHONGDECHANGXIAOYINGGUANYUANJIAN,WEIHUZHENGTIDIANLU。JUTINGOUDAOMOSGUANFANGFANJIEWEIHUDIANLUDIANLURUXIA:

双色球蓝球走势图  NGOUDAOMOSGUANTONGGUOSGUANJIAOHEDGUANJIAOCHUANJIEYUDIANYUANHEFUZAIZHIJIAN,DIANZUR1WEIMOSGUANGONGJIDIANYAPIANZHI,SHIYONGMOSGUANDEKAIGUANTEXINGKONGZHIDIANLUDEDAOTONGHEDUANKAI,CONGERBIMIANDIANYUANFANJIEJIFUZAIDAILAISUNHUAI。ZHENGJIESHIFEN,R1GONGJIVGSDIANYA,MOSBAOMANDAOTONG。FANJIEDESHIFENMOSBUNENGDAOTONG,SUOYIQIDAOFANGFANJIEZUOYONG。GONGLVMOSGUANDERds(on)ZHIYOU20mΩSHIJISUNHAOHENXIAO,2ADEDIANLIU,GONGHAOWEI(2×2)×0.02=0.08WDIZIBUBIWAIJIASANREPIAN。CHULILEXIANYOUXUANYONGERJIGUANDIANYUANFANGFANJIEJIHUACUNZAIDEYAJIANGHEGONGHAOGUODADEWENTI。

  VZ1WEIWENYAGUANBIMIANZHAYUANDIANYAGUOGAOJICHUANMOSGUAN。NMOSGUANDEDAOTONGDIANZUBIPMOSDEXIAO,ZUIHAOXUANNMOS。NMOSGUANJIEZAIDIANYUANDEFUJI,ZHAJIGAODIANPINGDAOTONG。PMOSGUANJIEZAIDIANYUANDEZHENGJI,ZHAJIDIDIANPINGDAOTONG。


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