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Gate Driver ICs Forum Discussions

wohehe123
Level 1
Level 1
First like given 5 sign-ins First reply posted

I am designing an isolated gate driver using 6N137 and 1EDN7126GXTMA1, but I'm not sure if it's ok to connect the grounds. Because in the datasheet IN- is connected to SGND while VSS is connected to PGND.

wohehe123_0-1671079073986.png

 

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yiye_4841451
Moderator
Moderator
Moderator
25 sign-ins 25 replies posted 10 solutions authored

Hello,

Both GNDs must be separated.

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wohehe123
Level 1
Level 1
First like given 5 sign-ins First reply posted

Thanks for answering!

But since I use optocoupler, I already have one isolated ground "GND_DRV", and my isolated DC/DC use this ground too. How can I provide power to the drvier IC 1EDN7126GXTMA1, if the Vss is not connected to this ground, or I don't need an optocoupler anymore? This question troubles me a whole day. I'm a rookie, really appreaciate any reply, thank you

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