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DRV401: what would have effects on oscilating frequency?

fiona feng
Prodigy 10 points
Part Number: DRV401

Hello,

based on DRV401, i'd like to learn about what would have effects on oscilating frequency of fluxgate? magnitc core and winding? But how do they work?

And if the turns of fluxgate become more, the frequency is bigger or samller? 

Thanks & Regards!

  • 0
    TI__Mastermind 32140 points

    Hello Fiona,

    This will be dependent on the determination of when the core is saturated.    As the DRV401 excites the flux gate probe the DRV401 determines when the probe is saturated before it changes the drive to the other direction.  The total impedance along with the drive capabilities of the DRV401 IS pins will determine this. 

    The datasheet describes it in more detail.  See section 7.3.1 Magnetic Probe (Sensor) Interface and figure 36 in the DRV401-Q1 datasheet.  If using the DRV401 see the datasheet figure 2a and the Magnetic Probe (Sensor) Interface section.