LTC1422 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1422' PDF : 16 Pages View PDF
LTC1422
APPLICATIONS INFORMATION
+
48V
–
FUSE
R1
36k
5%
Q2
MMBT5551LT1
R2
1.2k
5%
C3 +
100µF
R5
100V
10k
5%
LTC1422
1 RESET VCC 8
2 ON SENSE 7
3 TIMER GATE 6
4 GND
FB 5
C1
0.47µF
25V
D1
7.5V
1N755A
CIRCUIT TURNS ON WHEN VIN > 38V
CIRCUIT FOR ACTIVE LOW TURN-ON MODULES
C4
R6
1µF 1M
25V 5%
R7
270k
5%
R3
C2
0.1µF
10Ω
5%
25V
Q1
IRF530
R4
510Ω
5%
OPTIONAL
PRECHARGE RESISTOR
Figure 12. Switching 48V to an AT&T Module
AT&T
JW050A1-E
50W
VIN+ VOUT+
5V
SENSE +
SENSE –
VIN– VOUT–
ON/OFF
1422 F12
R1
36k
5%
+
48V
–
Q2
MMBT5551LT1
R2
1.2k
5%
FUSE
R5
10k
5%
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
C3 +
100µF
100V
+ VICOR +
5V
VI-J30-CY
_ GATE IN _
R4
5.1k
5%
Q3
MMBT5551LT1
R3
C2
0.1µF
10Ω
5%
25V
Q1
IRF530
R8
510Ω
5%
OPTIONAL
PRECHARGE RESISTOR
1422 F13
Figure 13. Switching 48V to a Vicor Module
13
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