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手贱,点下载了,浪费我的积分啊
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>VIN是多少?
>检查一下IR2014S 是否损坏,检测一下MOSFET的门极信号是否正常? >可考虑在MOSFET的G-S间加10K欧的下拉电阻; |
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chongsheng528 发表于 2016-3-28 12:37 VIN是24V,ir2104的电压就达不到15V,7.9V就特别的烫 |
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chongsheng528 发表于 2016-3-28 12:37 VIN是24V,降压模块送到IR2104的电压才7.9v,而且特别的烫 |
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“7815”发烫吗? 24V输入,15V输出, 9V的压差,可估算一下“7815”的功耗:9V * Iout |
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弄错了咋不取消,咋不修改,知错不改,这不活该吗?
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估计是MOS管有一边上下管同时导通了,分两步检查:
1、把MOS管全部断开,检查供电是否恢复正常,如果恢复正常,考虑是不是管坏了; 2、如果还不正常,再断开IC的供电,再检查。 先判断出是那一部分才能查出问题。 |
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