When the AC or DC current flows through the copper wire or copper bar, the chip will obtain the differential magnetic field signals on the two hall sensing units H1 and H2, and output an electrical signal proportional to the differential magnetic field signal.

The differential magnetic field signal is directly proportional to the current, bdiff = CF * I, CF is the coupling factor, which is related to the relative position of the chip and the copper bar, and I is the measured current.

Current detection of high voltage battery, starter and inverter of new energy vehicle