Datasheet
LTC1922-1
24
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
LINEAR TECHNOLOGY CORPORATION 2000
1922f LT/TP 0501 2K • PRINTED IN USA
TYPICAL APPLICATIO
U
PART NUMBER DESCRIPTION COMMENTS
LT1105 Off-Line Switching Regulator Built-In Isolated Regulation without Optoisolator
LT1681/LTC1698 36V to 72V Input Isolated DC/DC Converter Chipset Synchronous Rectification; Overcurrent, Overvoltage, UVLO
Protection; Power Good Output Signal;h Voltage Margining;
Compact Solution
LT1683 Ultralow Noise Push-Pull DC/DC Converter Minimizes Conducted and Radiated EMI; Reduces Need for Filters,
Shields and PCB Iterations
LTC1693-1 High Speed Dual MOSFET Driver 1.5A Peak Output Current; 4.5V ≤ V
IN
≤ 13.2V
LT1725 General Purpose Isolated Flyback Controller 48V to 5V Conversion; No Optoisolator Required
RELATED PARTS
Synchronous Phase Shifted Full Bridge 48V to 3.3V, 40A Isolated Converter
12
13
R5
2.2k
R3
470Ω
R6
470Ω
D3
BAT54
C12
0.1µF
T2
TTWB-1010
R12
13.3k
1%
R25
1k
1%
R24
10k
R16
13.3k
1%
R13
13.3k
1%
R17
13.3k
1%
C33
0.1µF
C18
0.1µF
C34
0.1µF
C23
100pF
R20
310k
R23
30k
R29
510Ω
R26
1k
1%
A
P
R7
2.2k
D4
BAT54
C14
0.1µF
C3
2.2µF
T3
TTWB-1010
8
1
8
3
1
2
6
7
6
5
7
4
D2
BAS21
D1
BAS21
BAS21
BAS21
10V
10V
10V
C1
2.2µF
Q4
FMMT718
Q5
FMMT619
Q13
FMMT718
R4
10Ω
R8
470Ω
R10
470Ω
R14
510Ω
Q3
Q2
FMMT718
R1
10
Q1
P
A
V
CC1
IN1
V
CC2
OUT1
U1
LTC1693-1
C6
1.5µF
100V
C10
1.5µF
100V
C2
1.5µF
100V
C5
1.5µF
100V
+V
IN
–V
IN
D14
1N4699
12V
D15
1N4683
3V
10V
C27
0.1µF
C28
68µF
20V
+
+
C31
0.068µF
10V
Q6
FMMT619
Q14
FMMT718
R21
3.3Ω
0.125W
C22
0.1µF
R28
3.3Ω
0.125W
R18
470Ω
0.125W
R22
950Ω
0.125W
T4, TTWB-1010
T5, TTWB-1010
C16
1nF
C19
1nF
R19
4.7k
R27
4.7k
D13
BAT54
D11
BAT54
D16
1
6
5
7
3
2
4
8
Q9 Q8 Q7Q10
C25
0.1µF
C26
0.02µF
C24
0.01µF
COLL
GNDF
GNDS
RMID
V
+
COMP
RTOP
REF
U4
LT1431
R31
7.5k
R32
10k
R33
3.01k
1%
R37
9.3k
1%
+V
OUT
–V
OUT
6
7
5
8
2
431
ISO1
MOC207
R36
100k
U3
LTC1922-1
V
IN
OUTE
OUTF
COMP
SBUS
SYNC V
REF
C
T
R
LEB
GND SS FB
ADLY DRVA PDLY DRVC DRVB DRVDRAMP
7T
8T 2T
L1
4.7µH
Q11 Q12
V
HIGH
V
HIGH
V
LOW
V
LOW
22µF
25V
R35
3.3k
R34
20k
C29
1µF
C30
180pF
CS
910188 16
15
111 205197 6
21714
4
3
NOTE: UNLESS OTHERWISE
NOTED
ALL CAPS 25V
ALL RESISTORS 1206, 5%
ALL DIODES MMBT914LT1
ALL NPNs MMBT3904LT1
ALL PNPs MMBT3906LT3
C21
4.7µF
C20
1µF
D12
MMSZ4240BT1
10V
C17
0.22µF
50V
V
CC1
IN2
IN1
GND2
V
CC2
OUT2
OUT1
GND1
U2
LTC1693-1
Q15
FZT600
R15
2k
0.125W
D6
BAS21
D6
BAS21
R11
10Ω
0.125W
+
C9
470µF
6V
+
C7
470µF
6V
+
C11
470µF
6V
+
C4
470µF
6V
C8, 1nF
100V
R2
10k
0.125W
L2
2.4µH
L3
2.4µH
+V
OUT
–V
OUT
C15
2.2nF
250V
AC "Y"
L4
2.2µH
R9
0.06Ω
1W
R30
470
C1, C3 TAIYO YUDEN EMK316BJ225ML (X5R, 16V, 1206)
C2, C5, C6, C10 VITRAMON VJ1825Y155MXB(X7R, 1825)
C4, C7, C9, C11 KEMET T510X477M006AS (TANT, 7343H)
C15 MU RATA GHM3035C7R222K-GC (X7R, 2220)
C17 TAIYO YUDEN UMK316BJ224ML (X7R,1206)
C20, C29 TAIYO YUDEN UMK316BJ105ML (X7R,1206)
C28 AVX TPSE686M020R0125 (TANT 7343H)
C21 TAIYO YUDEN EMK325BJ475MN (X5R, 1210)
R9 DALE WSL
L1 COILCRAFT DO3316P-472
L5 COILCRAFT DO1608C-105
L2, L2 PULSE P1977 PQ20/20 1.25mohms 20A
Q7, Q8, Q9, Q10 SUD50N03
Q1, Q3, Q11, Q12 SUD30N10-25
1922 TA02
3
2
5
4
OUT2
GND2
IN2
GND1
L5
1mH
5.1k