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MOSFET (Si/SiC) Forum Discussions

Bellawu
Employee
Employee
10 likes given 5 likes given 50 questions asked

来自一位客户的咨询,麻烦帮忙解答,越详细越好,有图有真相,可以适当提供一些英飞凌解决方案和产品推荐。

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Xiangrui
Moderator
Moderator
Moderator
50 solutions authored First question asked 50 sign-ins

MOSFET开关的时候ds会产生尖峰的主要原因是由于电路中感性负载对瞬时电流变化的反应所引起,u=-Ldi/dt.

由此公式我们可以看出,电压尖峰会受到 1. MOSFET关断前的电流 2. 开关速度 3. 电路中电感(包括寄生电感)的影响。

因此,在削减尖峰时我们可以相应从这几个方面进行考虑

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2 Replies
Xiangrui
Moderator
Moderator
Moderator
50 solutions authored First question asked 50 sign-ins

MOSFET开关的时候ds会产生尖峰的主要原因是由于电路中感性负载对瞬时电流变化的反应所引起,u=-Ldi/dt.

由此公式我们可以看出,电压尖峰会受到 1. MOSFET关断前的电流 2. 开关速度 3. 电路中电感(包括寄生电感)的影响。

因此,在削减尖峰时我们可以相应从这几个方面进行考虑

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FanLee
Level 1
Level 1
25 sign-ins 5 replies posted 10 sign-ins

无图无真相

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