V375A5C400B Vicor Corporation, V375A5C400B Datasheet - Page 9

• Manufacturer Part Number: V375A5C400B
• 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 collec-
tor 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
Disable = PC <2.3 V
Disable
Optocoupler
4 kΩ
4 kΩ
+IN
PC
PR
–IN
Set your site on VICOR at vicorpower.com
+IN
PC
PR
–IN
+IN
PC
PR
–IN
375V Maxi 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
1 M
SW1
(0-3 mA)
"Fault" position
5.7 Vdc
SW1, 2, & 3
+OUT
–OUT
shown in
2-20 ms typ.
Restart
SC
f (V IN )
+S
–S
Auto
2–20 ms typical
40 μs typ.
SW2
Input Undervoltage
Input Overvoltage
Overtemperature
Module Faults
1.00V
50 Ω
SW3
Comparator
1.23
Vdc
Rev. 8.5
(See Note 1)
1 K
6 K
Alarm
Page 9 of 14
– OUT
+OUT
+S
SC
–S