TIDA-00445: How does this design support "High-Side Current Sense Circuit With High Common-Mode Voltage of 1200-VPEAK"?

PY (Pengyu) Song

Part Number: TIDA-00445
Other Parts Discussed in Thread: AMC1200

Hi team,

Looking into the schematic, the sensing point (i.e. J1) is connected to ground, making the common mode voltage at ground. In this case, how is "High-Side Current Sense Circuit With High Common-Mode Voltage of 1200-VPEAK" implemented or achieved?

Thanks.

over 5 years ago

0 Navaneeth Narayanasamy over 5 years ago

TI__Intellectual 2890 points

Hello PengYu,
GND1 is referenced to the current shunt and can be floating. Low voltage side of AMC1200 is referenced to GND2. Voltage across GND1 and GND2 is limited by the isolation spec of AMC1200, which has an working voltage of 1200vpeak. Hope this clarifies.

regards
Navaneeth

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TIDA-00445: How does this design support "High-Side Current Sense Circuit With High Common-Mode Voltage of 1200-VPEAK"?