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