LTC1422 Linear Technology, LTC1422 Datasheet - Page 14

• Manufacturer Part Number: LTC1422
• Description: Hot Swap Controller
• Manufacturer: Linear Technology

APPLICATIONS
LTC1422
14
48V
+
–
COMMON
FUSE
– 48V
– 48V
RETURN
FUSE 1
FUSE 2
R1
36k
5%
R2
1.2k
5%
R6
10k
5%
4N25
U
R7
10k
5%
MUR415
MUR415
1N4148
1N4148
D2
D3
D4
D5
5.1k
INFORMATION
5%
R4
U
R1
36k
5%
R2
1.2k
5%
Figure 15. Switching 48V to a Vicor Module with Isolated Controller
5V
4N25
W
C1
0.1 F
25V
CIRCUIT TURNS ON WHEN V
CIRCUIT FOR ACTIVE HIGH TURN-ON MODULES
FAULT
C5
0.33 F
16V
Figure 14. Hop Swapping Redundant 48V Supplies
1
2
3
4
RESET
ON
TIMER
GND
1
2
3
4
LTC1422
R10
5.1k
5%
RESET
ON
TIMER
GND
U
SENSE
LTC1422
GATE
V
FB
CC
C1
0.33 F
16V
Q1 TURNS ON WHEN V
FAULT GOES LOW WHEN EITHER SUPPLY FAILS
SENSE
GATE
IN
V
8
7
6
5
FB
CC
> 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
FB
CC
> 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
C3
R3
10
5%
100 F
C4
1 F
25V
+
100V
C3
PRECHARGE RESISTOR
10k
5%
R4
+
C2
0.1 F
25V
OPTIONAL
RESET
+
_
4N25
1422 F15
510
VI-J30-CY
IRF530
GATE IN
5%
R8
VICOR
GND
Q1
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%