LTC1422IS8 Linear Technology, LTC1422IS8 Datasheet - Page 14

• Manufacturer Part Number: LTC1422IS8
• Description: IC CONTROLLER HOT SWAP 8-SOIC
• Manufacturer: Linear Technology
• Type: Hot-Swap Controllerr

Specifications of LTC1422IS8

• Applications: General Purpose
• Internal Switch(s): No
• Voltage - Supply: 2.7 V ~ 12 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATIONS
LTC1422
14
48V
+
–
COMMON
– 48V
– 48V
FUSE
RETURN
FUSE 1
FUSE 2
R1
36k
5%
R2
1.2k
5%
R6
10k
5%
U
4N25
R7
10k
5%
MUR415
MUR415
1N4148
1N4148
INFORMATION
D2
D3
D4
D5
5.1k
U
5%
R4
Figure 15. Switching 48V to a Vicor Module with Isolated Controller
R1
36k
5%
R2
1.2k
5%
4N25
5V
W
FAULT
C1
0.1 F
25V
CIRCUIT TURNS ON WHEN V
CIRCUIT FOR ACTIVE HIGH TURN-ON MODULES
C5
0.33 F
16V
Figure 14. Hot Swapping Redundant 48V Supplies
1
2
3
4
RESET
ON
TIMER
GND
1
2
3
4
R10
5.1k
5%
LTC1422
RESET
ON
TIMER
GND
U
SENSE
LTC1422
GATE
V
C1
0.33 F
16V
Q1 TURNS ON WHEN V
FAULT GOES LOW WHEN EITHER SUPPLY FAILS
CC
FB
SENSE
GATE
IN
V
8
7
6
5
CC
FB
> 38V
1
2
3
4
R5
6.2k
5%
8
7
6
5
D1
7.5V
1N755A
RESET
ON
TIMER
GND
LTC1422
0.5
5%
R9
SENSE
GATE
IN
V
CC
FB
> 38V
C4
1 F
25V
Q4
8
7
6
5
R10
10
5%
C6
0.022 F
16V
R9
1k
5%
R6
1M
5%
R7
270k
5%
PRECHARGE RESISTOR
R5
10k
5%
R13
28k
1%
R14
10k
1%
D1
7.5V
1N755A
C2
0.1 F
25V
OPTIONAL
+
510
IRF530
5%
R8
100 F
Q1
100V
C7
47 F
16V
R3
10
5%
C3
100 F
C4
1 F
25V
100V
+
C3
PRECHARGE RESISTOR
10k
5%
R4
+
C2
0.1 F
25V
OPTIONAL
RESET
+
_
510
4N25
1422 F15
VI-J30-CY
IRF530
5%
R8
GATE IN
VICOR
Q1
GND
V
PWRGD
CC
+
_
P
R3
10
5%
VI-J30-CY
GATE IN
VICOR
ON
+
_
Q2
MPSA56
+
_
5V
R11
5.1k
5%
1422 F14
5V
R12
5.1k
5%
1422fb