Freescale Semiconductor 33395, Reference Manual

Page: 32 / 44

DRM33395 Designer Reference Manual 33395 Evaluation Motor Board
30 Schematics and Parts List
Schematics and Parts List
Figure
4-4 Back-EMF Signals
max.
16V
u+
<6V
u+
=2*V_sense_DCB_h
alf@3.3V
3.30V
@
P
hase_C
=
1
6
V
max.
16
V
3.30V
@
Phase_B
=
1
6
V
u+
<6V
u+
=2*V_sense_DCB_h
alf@3.3V
u+
<6V
u+
=2*V_sense_DCB_h
alf@3.3V
3.30V
@
Phase_A
=
1
6
V
max.
16V
Frequency
:
1500Hz
+/-2
0
%
+
5
V
_
D
G
N
D
A
G
N
D
A
G
N
D
A
+
5
V
_
D
G
N
D
A
G
N
D
G
N
D
A
G
N
D
A
G
N
D
A
G
N
D
G
N
D
A
+
5
V
_
D
G
N
D
+
5
V
_
D
+
5
V
_
D
G
N
D
G
N
D
+
5
V
_
D
R
2
0
6
5
.6
k
R
2
2
4
3
3
k
R
2
2
5
3
3
k
R
2
1
3
5
.6
k
R
2
2
6
3
3
k
R
2
2
0
5
.6
k
R
2
0
9
1M
C
2
0
3
1
0
0
n
F
+ -
U
2
0
1
D
L
M
3
3
9
D
1
1
1
0
1
3
R
2
1
5
1M
C
2
0
1
1
0
0
p
F
R
2
0
1
1
0
k
-1
%
R
2
0
7
3
.3
k
-1
%
R
2
0
3
2
.7
k
-1
%
C
2
0
2
1
0
0
p
F
C
2
0
4
1
0
0
p
F
C
2
0
5
2
2
p
F
R
2
0
8
1
0
k
-1
%
R
2
1
4
3
.3
k
-1
%
R
2
1
0
2
.7
k
-1
%
R
2
1
6
1
0
k
-1
%
R
2
2
1
3
.3
k
-1
%
R
2
1
7
2
.7
k
-1
%
+ -
U
2
0
1
A
L
M
3
3
9
D
5 4
2
3 12
C
2
0
6
4
7
n
F
R
2
0
4
1
0
k
+ -
U
2
0
1
B
L
M
3
3
9
D
7 6
1
R
2
1
1
1
0
k
R
2
1
2
1
0
k
R
2
1
8
1
0
k
+ -
U
2
0
1
C
L
M
3
3
9
D
9 8
1
4
R
2
0
2
1M
R
2
1
9
1
0
k
R
2
0
5
1
0
k
R
2
2
2
1
0
k
R
2
2
3
1
0
k
P
h
a
s
e
_
B
G
N
D
A
+
5
V
_
D
B
E
M
F
_
s
e
n
s
e
_
C
Z
e
ro
_
c
ro
s
_
C
Z
e
ro
_
c
ro
s
_
B
P
h
a
s
e
_
A
B
E
M
F
_
s
e
n
s
e
_
A
V
_
s
e
n
s
e
_
D
C
B
_
h
a
lf
P
h
a
s
e
_
C
Z
e
ro
_
c
ro
s
_
A
B
E
M
F
_
s
e
n
s
e
_
B
G
N
D
Id
e
n
ti
fi
c
a
ti
o
n