Other Parts Discussed in Thread: DRV401
I found DRV421 demagnetization is different from DRV401, the waveform of VIcomp in DRV401 is invariable, it doesn't change with the demag current .
when the demag current is large (Rshunt is small enough such as 50ohm), drv421 will skip demagnetization without any waveforms in VICOMP . Is it due to the over saturation of the fluxgate sensor beacuse of
the larger demag current? as below
Therefore, the magnetization current is difficult to control to ensure the demagnetization is correct
my core parameters:
magnetic Gain =800-1000uT/A
N=1000 turns
air gap =0.3mm
L=200mH