42
9-1 BLOCK DIAGRAM (SMPS)
1
5
V
R
1
2
5
Q
1
0
2
R
1
2
8
R
1
2
9
-1
2
V
B
+
P
W
M
C
O
N
T
R
O
L
Q
9
1
2
,Q
9
1
4
,Q
9
2
0
IC
4
0
1
6
.3
V
T
9
0
1
R
9
2
2
,Z
D
9
0
2
D
9
0
9
,Q
9
0
4
2
6
1
2
3
4
5
IC
1
0
1
L
E
D
1
(7
0
V
-1
7
0
V
6
.3
V
Q
9
0
8
Q
9
0
7
1
2
V
+
7
5
V
IC
9
0
4
Q
9
1
0
Q
9
0
9
7
5
V
L
9
0
6
R
9
2
9
9
0
V
-2
6
4
V
Q
9
1
1
O
U
T
P
U
T
O
U
T
P
U
T
S
B
+
V
A
R
IA
B
L
E
)
M
O
S
F
E
T
P
O
W
E
R
V
A
R
I.
S
M
O
O
T
H
E
D
S
M
O
O
T
H
E
D
&
&
R
E
C
T
IF
IE
D
R
E
C
T
IF
IE
D
O
U
T
P
U
T
S
4
C
O
N
T
R
O
L
H
.O
.T
F
R
O
M
C
.K
.T
H
-S
Y
N
C
H
-S
Y
N
C
Is
O
/P
F
.B
V
C
C
M
O
S
F
E
T
P
O
W
E
R
Q
9
0
1
8
3
6
2
7
IC
9
0
1
P
W
M
O
/P
&
C
O
N
T
R
O
L
C
.K
.T
S
T
A
R
T
A
C
I
N
P
U
T
F
IL
T
E
R
L
IN
E
S
W
IT
C
H
O
N
/O
F
F
P
O
W
E
R
C
.K
.T
D
E
G
A
U
S
S
IN
G
V
IN
S
M
O
O
T
H
E
D
S
M
O
O
T
H
E
D
&
&
R
E
C
T
IF
IE
D
R
E
C
T
IF
IE
D
T
R
A
N
S
F
O
R
M
E
R
T
R
A
N
S
F
O
R
M
E
R
P
O
W
E
R
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