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Technical Article
氮化镓功率器件的反向导通
Release date:2023-04-13
Writer:
Category:Technical Article
Views:579次
Ø
和硅
MOS
不同,氮化镓器件没有
PN
结
Ø
当源极和门极接在一起
,
在
V
DS
上加一个负压相当于加一个正的
V
GD
Ø
当
V
GD
超过阈值电压,沟道会导通,类似于
MOS
管体二极管开通。
Ø
门极上加负压关断,在方向开通时漏极需要加上同样的负压,这样会增加器件的损耗
Ø
如果需要氮化镓反向续流同时门极负压关断:
1.
死区时间尽量短
2.
并联快恢复二极管
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氮化镓功率器件非理想硬开关门极驱动
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