Hello,
I am looking for a way to choose a current transformer that will work for a design identical to this reference design.
Here are the key specifications:
- Primary Side Current: 1A-100A range
- System Load: 40mA peak, ~10uA in standby
The main purpose of this design is to both power a transceiver on the secondary side, while also measuring the current at the output of the CT. Because the primary current range is so wide, I am unsure how this will work in the case of powering the boost controller/charging the supercap. As even if I choose a CT with the capability of providing ~>3V at the secondary side @ 100A input current, won't the voltage drop proportionally to ~30mV @ 1A input current?
Is there a workaround to use this reference design with this type of primary current range?
Also, it appears the backup battery included in the reference design is optional, and used only when there is no power from the CT or supercap. If there is no desire for a backup battery, will there be any issues with removing this from the design?
