How to work correctly with GND and PWRGN

How to work correctly with GND and PWRGND?

9/21/2016 8:53:29 AM

gnd pwrgnd

There is a circuit of me with a couple of bucket converters. The bucket converters are either standalone or getting a PWM signal from a processor and give a feedback to the processor. As far as I know, a star topology is quite useful to avoid EMI problems. How could I do this correctly in KiCad? Is it a need to separate the ground signals with an transformer or a optocoupler?

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barkoczay

11/6/2016 11:21:44 PM

You need to connect GND and PWRGND in one way by yourself. And I suggest you to via an inductor.

frmendozat

10/16/2016 11:36:13 PM

It is known that your GND and PWRGND are on different layers, so you don't have the problem of overlapping planes.

Colin

10/5/2016 3:34:48 AM

For your second question, it depends on the situation. Because some application need isolated power supplies, while some are not. If your application needs such an isolated power supply you need to use Transformers and Isolated DC/DC converters.

How to work correctly with GND and PWRGND?

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