SOUTHERN AVIONICS COMPANY
Model SA100 Dual
2-49
Theory of Operation, Radiobeacon
Figure 2-34. DC Power Supply PWB Schematic (Dual Units)
GN
D
GN
D
EXCV
RF
V
HV OUT
SHU
TD
O
W
N
RF
V
EXCV
GN
D
+12V
+12V
+12V
+12V
N
O
TES
1
. T
H
IS
D
R
A
W
IN
G
NO.
SEP30340
REV.
D.
2
. T
IT
LE
: DC
PCB,
DUAL
SCHEMATI
C.
3.
ASSEMBLY
DW
G.
NO.
SAP30340.
4
. A
LL RESI
STORS I
N
OHMS,
1/
4W
, 1%,
UNLESS NOTED.
5.
ALL CAPAC
IT
O
R
S
IN
u
F,
U
N
LE
S
S
N
O
TE
D
.
6
. ** F
A
C
TO
R
Y
S
E
LE
C
TE
D
C
O
M
P
O
N
E
N
T,
IF
N
E
E
D
E
D
.
+
C2 6.
8
CR4
1D
400400
TP4
C3 0.
001
+
C7 33
TP0
R4 3.
9K
Q1
1T250001
TP3
R1
7
10K
CR3
1D
440000
F3
1A
C1
0
0.
001
+
C1 1.
0
R1
8
18K
U4
1U
352400
V-
1
V+
2
VREF
16
VIN
15
COMP
9
+SENSE
4
-SENSE
5
SHTDWN
10
RT
6
CT
7
CA
12
EA
11
CB
13
EB
14
OSCOUT
3
GND
8
L1
1L0000
06
TP2
R10 1.
2K
1/
2W
R16 22K
C8 0.
001
R13 100K 1W
R15 4.
7K
C15 0.
001
W2 DCHO
R8 4.
7
U2
1U
211000
LO
1
COM
2
VCC
3
-
4
VS
5
VB
6
HO
7
-
8
VDD
9
HIN
10
SD
11
LIN
12
VSS
13
-
14
C1
7
**
TP
5
CR6
1D
474400
R2
5
10K
C16 150p
F
R9 4.
7
R30 10K
Q2
1T250001
Q3
1T952300
+
C9 3300
C4 0.
047
R11 1.
2K
1/
2W
R2
6
10K
R14 4.
7K
CR7 **
R3 **
F1
3A
P1
GOLD FI
NG
E
R
S
(2
2X
)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
JP
1
U3
1U
211000
LO
1
COM
2
VCC
3
-
4
VS
5
VB
6
HO
7
-
8
VDD
9
HIN
10
SD
11
LIN
12
VSS
13
-
14
R5 1.
8K
U1
1U
352400
V-
1
V+
2
VREF
16
VIN
15
COMP
9
+SENSE
4
-SENSE
5
SHTDWN
10
RT
6
CT
7
CA
12
EA
11
CB
13
EB
14
OSCOUT
3
GND
8
C6 3.
3
400V
CR2
1D
440000
R12 100K
CR1
1D
154000
R28 10K
CR
10
1D
440000
R6 10K
TP1
R29 10K
R2
0
390
R19 39K
CR8
1D
066200
R27 10K
R2 10K
CR
11
1D
440000
W3 GND
R7 33K
R3
2
390
W1 BT
R
Y
C5 0.
047
F2
2A
Summary of Contents for SA100
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