Datasheet

13
LTC1422
1422fb
Figure 13. Switching 48V to a Vicor Module
1
2
3
4
8
7
6
5
V
CC
SENSE
GATE
FB
VICOR
VI-J30-CY
Q3
MMBT5551LT1
5V
++
__
GATE IN
C3
100µF
100V
RESET
ON
TIMER
GND
LTC1422
Q1
IRF530
OPTIONAL
PRECHARGE RESISTOR
1422 F13
Q2
MMBT5551LT1
C1
0.1µF
25V
CIRCUIT TURNS ON WHEN V
IN
> 38V
CIRCUIT FOR ACTIVE HIGH TURN-ON MODULES
D1
7.5V
1N755A
C4
1µF
25V
R6
1M
5%
R7
270k
5%
C2
0.1µF
25V
R5
10k
5%
R1
36k
5%
R2
1.2k
5%
R3
10Ω
5%
R8
510Ω
5%
R4
5.1k
5%
48V
+
–
FUSE
+
1
2
3
4
8
7
6
5
V
CC
SENSE
GATE
FB
V
OUT
+
SENSE
+
SENSE
–
V
OUT
–
V
IN
+
V
IN
–
5V
ON/OFF
C3
100µF
100V
AT&T
JW050A1-E
50W
RESET
ON
TIMER
GND
LTC1422
Q1
IRF530
OPTIONAL
PRECHARGE RESISTOR
1422 F12
Q2
MMBT5551LT1
C1
0.47µF
25V
CIRCUIT TURNS ON WHEN V
IN
> 38V
CIRCUIT FOR ACTIVE LOW TURN-ON MODULES
D1
7.5V
1N755A
C4
1µF
25V
R6
1M
5%
R7
270k
5%
C2
0.1µF
25V
R5
10k
5%
R1
36k
5%
R2
1.2k
5%
FUSE
R3
10Ω
5%
R4
510Ω
5%
48V
+
–
+
Figure 12. Switching 48V to an AT&T Module
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