LTC1922EG-1 Linear Technology, LTC1922EG-1 Datasheet - Page 24

• Manufacturer Part Number: LTC1922EG-1
• Description: IC CTRLR PWM SYNC 20SSOP
• Manufacturer: Linear Technology

Specifications of LTC1922EG-1

• Pwm Type: Voltage/Current Mode
• Number Of Outputs: 1
• Frequency - Max: 1MHz
• Duty Cycle: 99%
• Buck: No
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SSOP
• Frequency-max: 1MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Supply: -

RELATED PARTS
LTC1922-1
24
TYPICAL APPLICATIO
1.5 F
PART NUMBER
LT1105
LT1681/LTC1698
LT1683
LTC1693-1
LT1725
+V
100V
–V
IN
C5
IN
4.7 H
1.5 F
TTWB-1010
100V
L1
C10
BAT54
470
C12
0.1 F
2.2k
10V
R3
R5
D3
1N4683
T2
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
0.1 F
C27
D15
1.5 F
3V
100V
C2
BAS21
10V
470
D2
68 F
2.2 F
R6
C28
20V
1.5 F
100V
C3
C6
1N4699
+
TTWB-1010
R29
510
BAS21
DESCRIPTION
Off-Line Switching Regulator
36V to 72V Input Isolated DC/DC Converter Chipset
Ultralow Noise Push-Pull DC/DC Converter
High Speed Dual MOSFET Driver
General Purpose Isolated Flyback Controller
BAT54
D1
C14
0.1 F
2.2k
D14
12V
R7
D4
T3
8
1
3
2
R23
30k
15
IN2
GND1
V
IN1
R24
10k
CC1
LTC1693-1
310k
Synchronous Phase Shifted Full Bridge 48V to 3.3V, 40A Isolated Converter
R20
SYNC
V
IN
U1
470
SBUS
1
5.1k
R8
OUT1
GND2
OUT2
9
V
R25
1%
CC2
13.3k
13.3k
1k
R12
R16
V
1%
1%
REF
ADLY
11
6
7
5
4
A
C29
1 F
U
10V
10
0.1 F
Q5
FMMT619
Q13
FMMT718
C33
22 F
10V
25V
0.1 F
0.1 F
C18
C22
DRVA
R35
3.3k
C1
2.2 F
+
18
R26
0.125W
0.125W
1%
C
13.3k
13.3k
1k
3.3
3.3
10
R21
R28
R4
T
20
R13
R17
Q11
1%
1%
C30
180pF
470
PDLY
1mH
R10
LTC1922-1
L5
P
8
T4, TTWB-1010
0.1 F
T5, TTWB-1010
R
Q4
FMMT718
U3
C34
LEB
5
R34
20k
DRVC
BAS21
16
10V
GND
100pF
C23
Q6
FMMT619
Q3
19
Q14
FMMT718
A
C16
1nF
C19
RAMP
1nF
P
BAS21
R1
10
2
SS
2.2 H
DRVB DRVD
7
L4
R19
4.7k
R27
4.7k
C31
0.068 F
17
Q2
FMMT718
BAT54
14
Q12
R9
0.06
1W
D13
BAT54
FB
D11
COMP
8T
7T
OUTF
OUTE
6
CS
Q1
COMMENTS
Built-In Isolated Regulation without Optoisolator
Synchronous Rectification; Overcurrent, Overvoltage, UVLO
Protection; Power Good Output Signal;h Voltage Margining;
Compact Solution
Minimizes Conducted and Radiated EMI; Reduces Need for Filters,
Shields and PCB Iterations
1.5A Peak Output Current; 4.5V V
48V to 5V Conversion; No Optoisolator Required
3
R14
510
12
13
4
V
V
0.125W
LOW
6
2T
HIGH
470
0.125W
Q10
R18
950
5
R22
D16
MOC207
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
ISO1
7
8
4 3 1
8
3
1
2
Q9
2.4 H
2
L2
V
IN2
IN1
GND2
CC1
LTC1693-1
R30
470
R36
100k
R2
10k
0.125W
C8, 1nF
100V
U2
Q8
GND1
OUT2
OUT1
V
CC2
C25
0.1 F
6
5
7
4
0.01 F
Q7
C24
LINEAR TECHNOLOGY CORPORATION 2000
1
6
5
7
2.4 H
V
V
HIGH
L3
LOW
COLL
GNDF
GNDS
RMID
IN
1922f LT/TP 0501 2K • PRINTED IN USA
LT1431
C20
1 F
+
BAS21
BAS21
U4
D6
13.2V
D6
COMP
FZT600
RTOP
470 F
MMSZ4240BT1
REF
C9
470 F
6V
Q15
V
C21
4.7 F
C7
6V
+
+
3
2
4
8
0.125W
10
R11
+
NOTE: UNLESS OTHERWISE
NOTED
ALL CAPS 25V
ALL RESISTORS 1206, 5%
ALL DIODES MMBT914LT1
ALL NPNs MMBT3904LT1
ALL PNPs MMBT3906LT3
D12
10V
R31
7.5k
470 F
C11
470 F
6V
C4
6V
AC "Y"
2.2nF
250V
0.22 F
R15
2k
0.125W
C15
R33
3.01k
1%
R37
9.3k
1%
+
C17
50V
+V
– V
OUT
OUT
R32
10k
C26
0.02 F
1922 TA02
+V
– V
OUT
OUT