V48B24C250BF2 Vicor Corporation, V48B24C250BF2 Datasheet - Page 6

• Manufacturer Part Number: V48B24C250BF2
• Manufacturer: Vicor Corporation

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The module may be disabled by pulling PC below 2.3 V with
respect to the –Input. This may be done with an open collector
transistor, relay, or optocoupler. Multiple converters may be
disabled with a single transistor or relay either directly or via
“OR’ing” diodes. See Figure 1.
At 5.7 V, PC can source up to 1.5 mA. In the example shown
in Figure 3, PC powers a module enabled LED.
Figure 1 — Module enable/disable.
Figure 3 — LED on-state indicator.
Figure 5 — Isolated on-state indicator.
Enabled"
"Module
Optocoupler
Disable = PC <2.3V
Disable
4kΩ
4 kΩ
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+In
PC
PR
–In
+In
PC
PR
–In
+In
PC
PR
–In
+Out
–Out
+Out
–Out
SC
SC
+S
–S
+S
–S
+Out
–Out
SC
+S
–S
48V Mini Family
Figure 2 — PC/SC module alarm logic.
Figure 4 — PC/SC module alarm timing.
Figure 6 — Secondary side on-state indicator.
The module contains “watchdog” circuitry which monitors
input voltage, operating temperature and internal operating
parameters. In the event that any of these parameters are
outside of their allowable operating range, the module will
shut down and PC will go low. PC will periodically go high
and the module will check to see if the fault (as an example,
overtemperature) has cleared. If the fault has not been cleared,
PC will go low again and the cycle will restart. The SC pin
will go low in the event of a fault and return to its normal
state after the fault has been cleared. See Figures 2 and 4.
1
Not applicable for 300 Vdc input family
Fault
+IN
–IN
PC
PR
PC
SC
1.23 V
5.7 V
+In
PC
PR
–In
1 M
SW1
(0-3 mA)
"Fault" position
5.7 Vdc
SW1, 2, & 3
shown in
2-20 ms typ.
Restart
Auto
f (V IN )
+Out
–Out
SC
+S
–S
2–20 ms typical
40 μs typ.
SW2
Input Undervoltage
Input Overvoltage
Module Faults
Overtemperature
50 Ω
1.00V
SW3
1.23
Vdc
Rev. 7.4
(See Note 1)
1 K
6 K
Alarm
Page 6 of 11
– OUT
+OUT
+S
SC
–S