BA6811F 데이터 시트보기 (PDF) - ROHM Semiconductor

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BA6811F

Fan motor driver IC

ROHM Semiconductor 

Motor driver ICs

(3)Hall amplifier input voltage

BA6811F / BA6813F

Hall current is given by :

VCC

R1)R2)RH

where RH is the Hall device impedance.

The R1 and R2 resistances must be set so as to maintain

the Hall amplifier input bias voltage within the range of 0V

to (VCC*2.8V) including the signal amplitude.

The Hall device may be affected by power supply noise

due to the PCB conductor pattern. If you have this prob-

lem, insert a capacitor C1 as shown in Fig. 5.

If the conductor lines from the Hall device output termi-

nals to the Hall inputs of the IC are particularly long, noise

can be picked up and fed into the inputs. If you have this

problem, insert a capacitor C2 as shown in Fig. 5. Note

that the Hall inputs have no hysteresis in this IC.

FExternal dimensions (Units: mm)

717

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