BA6849 ROHM [Rohm], BA6849 Datasheet - Page 9

• Manufacturer Part Number: BA6849
• Description: 3-phase motor driver for CD-ROMs
• Manufacturer: ROHM [Rohm]

(2)
The R
(E
(3)
The reverse detection circuit construction is shown in
Fig.11.
(1) Forward (E
The phase relationship between the Hall input signals
H2
verse rotation detection circuit does not operate.
(2) Reverse (E
The phase relationship between the signals H
H
verse rotation detection circuit operates. The output
goes OFF, and becomes open circuit.
Motor driver ICs
3
C
)
)
) is as follows:
is opposite that for forward operation, and the re-
Torque command
Reverse rotation detection function
and H3
NF
pin voltage with respect to the torque command
)
C
C
becomes as shown in Fig.9, and the re-
< E
> E
CR
CR
)
)
BA6849FP / BA6849FP-Y / BA6849FM / BA6849FS
2
)
and
The I / O gain (G
current) is determined by the R
The torque limit current I
G
I
TL
EC
= 0.35 / R
= 0.255 / R
EC
NF
) from the E
[A]
NF
[A / V]
TL
is given by:
C
NF
pin to the R
detector resistor.
NF
pin (output
871