OutToLunch
New Member
so, you still have the feedback in the same configuration as the schematic that you posted earlier? The system is unstable. You can see it with the oscillations on the output when the load is applied.
The output is also experiencing a 200mV drop when load is applied. For a 1A maximum load, this is significant. There could be a number of reasons why this is occurring, so I would address the stability issue first. Go back to my component suggestions post, make the changes and then retest.
Using ground planes and power planes is a good thing. They reduce parasitics, allow more current to flow and can help dissipate heat. I'm not sure what current loops around the MOSFETs you are refering to. Perhaps posting your layout for some review would benefit you as well.
The output is also experiencing a 200mV drop when load is applied. For a 1A maximum load, this is significant. There could be a number of reasons why this is occurring, so I would address the stability issue first. Go back to my component suggestions post, make the changes and then retest.
Using ground planes and power planes is a good thing. They reduce parasitics, allow more current to flow and can help dissipate heat. I'm not sure what current loops around the MOSFETs you are refering to. Perhaps posting your layout for some review would benefit you as well.