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DER-865 Using Live as Ground (reference).

Posted by: gid204 on 11/03/2021

Hi, I was wondering why you used the source of the back to back MOSFETs as ground, was there any specific reason for this? I am wondering if this could be replaced by using live input as ground?

See attached photo for edited schematic, refer to red arrows for changes.

Thanks!

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Live ground.png 272.95 KB

Comments

Submitted by PI-Crumb on 11/16/2021

Hi,

We used the source as reference to be able to provide the required VGS to turn ON the FETs. I don't see how the circuit would work by using the live input as ground and floating the Source pins.

 

Thanks.