BA6444 ROHM Electronics, BA6444 Datasheet - Page 8

• Manufacturer Part Number: BA6444
• Description: 3-phase Motor Driver
• Manufacturer: ROHM Electronics

(6)
The cancellation ratio of the torque ripple cancellation cir-
cuit (Fig. 10) can be adjusted by an external resistor con-
nected to pin 1. Select a suitable value by taking wow and
flutter into consideration.
The ripple cancellation ratio can be obtained in the fol-
lowing manner. With E
input of (H1
and the R
= (L, M, H) is denoted as V2. The ripple cancellation ratio
is then given by:
Motor driver ICs
R
CC
Ripple cancellation circuit
=
NF
(V
)
value for the Hall input of (H1
V
1
, H2
)V
2
*V
)
2
) / 2
1
, H3
C
)
= 2.7V, the R
) = (L, L, H) is denoted as V1,
100 (%)
NF
value for the Hall
)
, H2
)
, H3
)
)
(7)
The brake pin threshold depends on the chip tempera-
ture as shown in Fig. 16. Make sure that your application
will work properly when using the IC at low or high tem-
peratures.
Brake pin
BA6444FP
641