mlx90401 Melexis Company, mlx90401 Datasheet - Page 9

• Manufacturer Part Number: mlx90401
• Description: Brushless Dc Motor Controller Not For New Designs!
• Manufacturer: Melexis Company

7.8 Undervoltage lockout
Should the voltage level on V
undervoltage condition disappears, to prevent improper drive of the power FETs.
7.9 Logic table
Following table shows the output state in function of the inputs. It summarizes the different functions of the
MLX90401. SA = Hall Sensor input A, …
The phases mentioned in the table are electrical phases as they are generated by the Hall sensors. The
difference between a 60 degree motor and a 120 degree motor is shown in the graph below. By manually
turning the motor these outputs can easily be found on an oscilloscope.
3901090401
Rev 005
position
Motor
120°
180°
240°
300°
300°
240°
180°
120°
60°
60°
0°
0°
Hall output 1
Hall output 2
Hall output 1
Hall output 2
Hall output 3
Hall output 3
SA
0
1
1
1
0
0
0
0
0
1
1
1
x
x
Sensor Electrical Phasing
SB
60°
0
0
1
1
1
0
0
0
1
1
1
0
x
x
SC
0
0
0
1
1
1
0
1
1
1
0
0
x
x
60
120
SA
1
1
1
0
0
0
1
0
0
0
1
1
x
x
DD
Inputs
drop below the undervoltage level, all gate drives will be turned off until the
120°
SB
0
0
1
1
1
0
0
0
1
1
1
0
x
x
SC
1
0
0
0
1
1
1
1
1
0
0
0
x
x
1
1
1
1
1
1
0
0
0
0
0
0
x
x
Table 4 : Logic table
Page 9 of 13
1
1
1
1
1
1
1
1
1
1
1
1
0
x
1
1
1
1
1
1
1
1
1
1
1
1
1
0
TA
Brushless DC Motor Controller
1
1
0
0
0
0
0
0
1
1
0
0
0
0
Top Drive
TB
0
0
1
1
0
0
1
1
0
0
0
0
0
0
TC
0
0
0
0
1
1
0
0
0
0
1
1
0
0
Apply to Hall A pin
Apply to Hall B pin
Apply to Hall C pin
BA
0
0
0
1
1
0
1
0
0
0
0
1
0
Bottom Drive
1
Outputs
Apply to Hall A pin
Apply to Hall B pin
Apply to Hall C pin
MLX90401
BB
1
0
0
0
0
1
0
0
0
1
1
0
1
0
BC
0
1
1
0
0
0
0
1
1
0
0
0
1
0
PA
Motor phases
v
v
v
v
^
^
^
^
v
-
-
-
-
-
Data sheet
PB
v
^
^
v
^
^
v
v
v
-
-
-
-
-
Oct/05
PC
v
v
v
v
v
^
^
^
^
-
-
-
-
-