13
LTC1693
TYPICAL APPLICATIONS
U
TDRIVE
PWR V
IN
PINV
BINH
V
IN
C
T
I
TH
SENSE
–
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
BDRIVE
PGND
LB
OUT
LB
IN
SGND
SHDN
V
FB
SENSE
+
U2
LTC1266A
D1
6.2V
500mW
C1
220µF
16V
C3
0.1µF
100V
Q4
FZT694B
D3
MMSD4148
D2
MMSD4148
R1
47k
IN1
GND1
IN2
GND2
8
7
6
5
1
2
3
4
V
CC1
OUT1
V
CC2
OUT2
U1
LTC1693-1
WINDING
T1A
T1B
T1C
T1D
T1E
T1F
# TURNS
3
1
2
3
9
32
AWG
28
28
28
28
28
28
+
R11
12.1k
R4
390Ω
D10
1N4148
C6
100pF
NPO
T1 WINDING ORDER:
1. T1A, T1B, T1C, T1D QUAD-FILAR, WOUND FIRST,
AFTER T1A, T1B, T1C AND T1D WOUND, REMOVE
2 TURNS FROM T1B AND 1 TURN FROM T1C
2. T1E WOUND ON TOP, SPREAD EVENLY
3. LAYER OF INSULATION
4. T1F WOUND ON TOP, SPREAD EVENLY
T1 CORE:
COILTRONICS VP4-TYPE, AIR GAP, 0.7mm or 2 × 0.35mm SPACERS
PRIMARY INDUCTANCE OF T1F = 50µH
ALTERNATIVE CORES:
SIEMENS EFD20, N67 MATERIAL, TDK PC40-EPC17
T1 TRANSFORMER
COILTRONICS VP4-TYPE
R5
100Ω
Q2
IRF620
C5
1nF
C2
0.1µF
C7
0.1µF
25V
C
IN1
220µF
50V
+
C
IN2
220µF
50V
C
C2
100pF
5%
C
C1
10nF
R
CL
6.8k
C11
120pF
5% NPO
+V1
+V1
+V1
–V
IN
–24V TO –35V
GND
+
T1A
3T
#28
6
7
12
1
11
2
10
3
9
4
8
5
Q
O1
Si9803
Q
O2
Si9803
L
O2
2.2µH
D
O3
MBRM140
R9
1M
D8
BAV21
D7
BAV21
D6
3.3V 500mW
R2
22Ω
Q1
2N5401
C4
1nF
50V
T1B
1T
#28
T1C
2T
#28
C
O2A
330µF
6.3V
T1F
32T
#28
50µH
T1D
3T
#28
T1E
9T
#28
L
O1
1µH
5V
L
O3
2.2µH
D
O4
MBRM140
+
C
O3A
330µF
6.3V
+
C
O4
220µF
25V
C11
0.1µF
100V
1693 TA04
D9
5.6V
0.5W
C9
1nF
R8
1k
Q3
2N2222
+
C
O1A
330µF
6.3V
+
C
O3B
330µF
6.3V
+
C
O2B
330µF
6.3V
+
R
F1
42.2k
1%
R6
10Ω
R
X1
120Ω
1/2W
R3
0.1Ω
R7
4.7Ω
C
O1B
330µF
6.3V
+
C
X1
220pF
50V
C
O4B
0.1µF
16V
5V
0.8A
3.3V
0.3A
2.5V
0.3A
–5V
30mA
•••
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Multiple Output Telecom Power Supply
