Tool/software:
Hi, I'm testing the circuit below and it's detecting the AC peak instead of zero cross, unless I connect oscilloscope to isolated GND OUT2 then it works as expected.
Is connecting Neutral to INN necessary or can it be floating.
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Tool/software:
Hi, I'm testing the circuit below and it's detecting the AC peak instead of zero cross, unless I connect oscilloscope to isolated GND OUT2 then it works as expected.
Is connecting Neutral to INN necessary or can it be floating.
Connecting Neutral to GND1 blows the circuit, the AMC23C10 high side is powered through an isolated SMPS.
The initial schematic is incomplete, so here’s a more detailed version that includes the SMPS internals. I connected AC1 to GND1/INN, which caused the fuse to blow along with the bridge rectifier.
Hi LA,
Yes, this makes sense.
I think you may need to consider a change in architecture in order for the circuit to work properly.
Building something like this is an option: https://www.ti.com/lit/an/snva735/snva735.pdf
Or using a standalone DC/DC converter to convert voltage from the low to the high voltage domain is another.
An example of such a circuit can be found on the EVM, we also have modules from TI: https://www.ti.com/power-management/acdc-dcdc-converters/overview.html