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TIDA-00637: TIDA-00637 design problems

Part Number: TIDA-00637

Hi Team,

my cusotmer is looking for TIDA-00637 for leakage currnet detection for on board charger application,

two questioins,

1. CT for GFCI current detection and protection, they would like to know the CT part number and spec

2. on schematic page 14, R14 resense resisitor has + and - single, but U3A's supply voltage is AVCC =5V only , may i know the purpose for this circuit