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| ISL6144_07 Datasheet, PDF (12/29 Pages) Intersil Corporation – High Voltage ORing MOSFET Controller | |||
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Typical Performance Curves and Waveforms (Continued)
IIN2
VOUT
VIN2
2A/DIV
10V/DIV
10V/DIV
VGS2
VGS2
5V/DIV
IIN2
VOUT
2V/DIV
VIN2
5V/DIV
2A/DIV
FIGURE 13. SLOW SPEED TURN-OFF, VIN = 48V, COMMON
LOAD IS SMPS (CLOAD = 100µF) WITH
EQUIVALENT 4A LOAD
FIGURE 14. SLOW SPEED TURN-OFF, VIN = 12V, COMMON
LOAD IS SMPS (CLOAD = 100µF) WITH
EQUIVALENT 4A LOAD
Application Circuit
INPUT BUS 1
36V TO 75VDC
DC/DC
#1
+IN +OUT
CIN1
100µF
Cd1
220nF
Ccs1 PC
1nF
+S
SC
PR
-S
-IN -OUT
+OUT1 = 48V
Rpb1 Sa
10
Sb
FROM
CB
F1
D1 (NOTE 7)
15A
Cpb1
22µF
Q1
FDB3632
C1
150nF
VIN GATE VOUT
5V
R3
4.99k
HVREF U1 COMP
ISL6144
FAULT
VSET
GND
R1
499
R2
47.5k
C2
10nF
COMMON BUS âCBâ
10A
INPUT BUS 2
36V TO 75VDC
CIN2
100µF
Cd2
220nF
DC/DC
#2
+IN +OUT
Ccs2
1nF
PC +S
SC
PR
-S
-IN -OUT
+OUT2 = 48V
Rpb2 Sa
10
Sb
FROM
CB
F2
15A
D2 (NOTE 7)
Cpb2
22µF
Q2
FDB3632
C3
150nF
VIN GATE VOUT
5V R4
4.99k
HVREF U1 COMP
ISL6144
FAULT
VSET
GND
R5
499
R6
47.5k
C4
10nF
PRIMARY
SECONDARY
NOTES:
11. D1, D2 are parasitic MOSFET diodes.
12. Remote Sense pin (+S) on both DC/DC converters has to be connected either directly at the module output (Sa closed) or to the CB point (Sb
closed). Connecting to CB is not recommended as it might cause Fault propagation in case of short circuit on a PS output.
13. F1, F2 are optional and can be eliminated depending on power system configuration and requirements.
14. DC/DC #1, 2 configuration is based on Vicor V48B48C250AN3.
FIGURE 15. APPLICATION CIRCUIT FOR A 1 + 1 REDUNDANT 48V SYSTEM
12
FN9131.3
February 15, 2007
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