SOUTHERN AVIONICS COMPANY
Model SA100 Dual 2-49Theory of Operation, Radiobeacon
Figure 2-34. DC Power Supply PWB Schematic (Dual Units)
GND
GND
EXCV
RFV
HV OUT
SHUTDOWN
RFV
EXCV
GND
+12V
+12V
+12V
+12V
NOTES
1. THIS DRAWING NO. SEP30340 REV. D.
2. TITLE: DC PCB, DUAL SCHEMATIC.
3. ASSEMBLY DWG. NO. SAP30340.
4. ALL RESISTORS IN OHMS, 1/4W, 1%, UNLESS NOTED.
5. ALL CAPACITORS IN uF, UNLESS NOTED.
6. ** FACTORY SELECTED COMPONENT, IF NEEDED.
+
C2
6.8
CR4
1D400400
TP4
C3
0.001
+
C7
33
TP0
R4
3.9K
Q1
1T250001
TP3
R17
10K
CR3
1D440000
F3
1A
C10
0.001
+
C1
1.0
R18
18K
U4
1U352400
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
1L000006
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
1U211000
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
C17
**
TP5
CR6
1D474400
R25
10K
C16
150pF
R9
4.7
R30
10K
Q2
1T250001
Q3
1T952300
+
C9
3300
C4
0.047
R11
1.2K
1/2W
R26
10K
R14
4.7K
CR7
**
R3
**
F1
3A
P1
GOLD FINGERS (22X)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
JP1
U3
1U211000
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
1U352400
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
1D440000
R12
100K
CR1
1D154000
R28
10K
CR10
1D440000
R6
10K
TP1
R29
10K
R20
390
R19
39K
CR8
1D066200
R27
10K
R2
10K
CR11
1D440000
W3
GND
R7
33K
R32
390
W1
BTRY
C5
0.047
F2
2A
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