MJE18004
13500
-/09+
全新原装现货销售房间现货
MJE18004
20000
TO92/22+
奥利腾只做原装正品,实单价优可谈
MJE18004
5000
TO220/25+
提供BOM一站式配单服务
MJE18004
5000
TO220/23+
原装库存,提供优质服务
MJE18004
5000
TO220/26+
全新原装现货,一站式配单服务
MJE18004
6000
TO263/23+
终端可以免费供样,支持BOM配单
MJE18004
5000
TO220/25+
只做原装,可提供技术支持及配单服务
MJE18004
18500
TO2203/25+23+
原装渠道优势商全新进口深圳现货原盒原包
MJE18004
41608
TO220/26+
只做原装,专注提供BOM配单服务
MJE18004
9400
TO220/23+
原装现货
MJE18004
3000
TO220/10+/11+
原装正品热卖,价格优势
MJE18004
5935
TO220/07+
原装现货
MJE18004
52701
TO220/22+
只做原装,专注海外现货订购20年
MJE18004
540030
SO8/22+
可查官网https//www.icscjh.com/
MJE18004
154836
TO263/2025+
终端可以免费供样,支持BOM配单
MJE18004
60000
TO220/25+
只做自己原装现货,10年保证
MJE18004
9000
TO220/24+
原装现货,提供优质配单服务
MJE18004
20000
TO220/24+
QCW/群川微完美代用进口质量国产价格
MJE18004
15988
DPAK/25+
助力国营二十余载,一站式BOM配单
MJE18004
5240
TO220/21+
中研正芯,只做原装
MJE18004
POWER TRANSISTOR
ONSEMI
MJE18004PDF下载
MJE18004
POWER TRANSISTOR 5.0 AMPERES 1000 VO...
MOTOROLA
MJE18004PDF下载
MJE18004
POWER TRANSISTOR 5.0 AMPERES 1000 VO...
MOTOROLA [Motorola, Inc]
MJE18004PDF下载
MJE18004
POWER TRANSISTOR
ONSEMI [ON Semiconductor]
MJE18004PDF下载
MJE18004G
TRANS NPN 450V 5A TO220AB
MJE18004GPDF下载
MJE18004G
TRANSISTOR, NPN, TO-220; Transistor ...
ON Semiconductor
MJE18004GPDF下载
MJE18004-D
SWITCHMODE NPN Bipolar Power Transis...
ON Semiconductor
MJE18004-DPDF下载
MJE18004D2
POWER TRANSISTORS
ONSEMI
MJE18004D2PDF下载
MJE18004D2
POWER TRANSISTORS 5 AMPERES 1000 VOL...
MOTOROLA
MJE18004D2PDF下载
MJE18004D2
POWER TRANSISTORS
ONSEMI [ON Semiconductor]
MJE18004D2PDF下载
管导通时间的中点,其大小为(π/2)udc,因此另一个晶体管处于关断状态时承受的电压为πudc。 假设正常的交流输入电压有效值为120v,并假设有±15%的偏差,所以峰值电压为1.41×1.15×120=195v。考虑到pfc电路能产生很好的可以调节的直流电压,大约比输人交流电压高20v左右,就有udc=195+20=215v。这样晶体管要保证安全工作就必须能够承受值为πud。的关断电压,也就是675v的电压。当前有很多晶体管的额定值都可以满足电流电压和频率ft的要求(如mje18002和mje18004,它们的uce=1000v,ft=12mhz,β值最小为14)。即使晶体管的ft=4mhz也没有关系,因为晶体管在关断后反偏电压的存在大大减小了它的存储时间。 从图中的(2)~(5)可以看出,晶体管电流在电压的过零点处才会上升或下降,这样可以减少开关管的开关损耗。因为通过初级的两个绕组的正弦半波幅值相等,所以其伏秒数也是相等的,而且由于存储时间可以忽略(见图(b)中的(1)),也就不会产生磁通不平衡或瞬态同时导通的问题了。 每个半周期内的集电极电流如图中的(4)和(5)所示。在电