BA6901F(Old_V) Ver la hoja de datos (PDF) - ROHM Semiconductor
Número de pieza
componentes Descripción
Fabricante
BA6901F Datasheet PDF : 10 Pages
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Motor driver ICs
BA6901F
2) Power dissipation
Power consumption (PC) of BA6901F is calculated to the following equation.
Pc = Pc1 + Pc2 + Pc3
(1) Pc1 : Power consumption by circuit current
Pc1 = VCC × ICC
(2) Pc2 : Power consumption of output terminal
Pc2 = (VCC – VOH ) × Io
VOH is H voltage of output (A1 or A2).
Io can be decreased by using the transistor of high hFE rank and it is effective to consumption
electric power reduction.
(3) Pc3 : Power consumption of HO, AL and ALB terminal
Pc3 = VHO × IHO + VAL × IAL + VALB × IALB
VHO is L voltage of Hall signal output (HO).
VAL and VALB are L voltage of lock detection output (AL or ALB).
IHO, IAL and IALB are current of HO, AL or ALB.
Please care to the terminal design not to exceed the allowable power dissipation.
3) Hall signal input terminal (H+, H−)
VCC
VCC-2.8V
1/2VCC
H−
H+
VCC
C2
R1
RH
C1
Hall element
R2
GND
Hall Amp input bias voltage
Hall Amp input current =
VCC
R1 + R2 + RH
RH : Impedance of Hall element
Hall amp of BA6901F has input hysteresis
(±10mV : Typ.)
Please adjust hall Amp input bias voltage by value of R1, R2 so that hall signal contains amplitude, input within range
0V∼ (VCC−2.8V).
In case VCC noise influence the hall signal by board wiring pattern, please connect capacitor C1 like above figure.
In the case of long board wiring pattern from hall element to hall signal input terminal, please connect capacitor C2 like
above figure.
4) GND
Please keep up the voltage of GND less than the voltage of another terminal surely.
5) This product is produced with strict quality control, but destroyed in using beyond absolute maximum ratings.
Once IC destroyed, a failure mode cannot be defined (like short-mode or open-mode). Therefore, physical security
counter measure, like fuse, is to be given when a specific mode to be beyond absolute maximum ratings is
considered.
9/10
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