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V375B15C300B Datasheet, PDF (4/8 Pages) Vicor Corporation – 375Vin / 15Vout / 300Watts DC-DC Converter Module
CONTROL FUNCTIONS - PC PIN
Module Enable/Disable
The module may be disabled by pulling PC below 2.3V 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.
Primary Auxiliary Supply
At 5.7V, PC can source up to 1.5mA. In the example shown in
Figure 3, PC powers a module enabled LED.
Module Alarm
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.
+In
PC
Disable
PR
–In
Disable = PC <2.3V
Figure 1—Module enable/disable.
+Out
+S
SC
–S
–Out
Input Undervoltage
Input Overvoltage
+In
SW1
Auto
Restart
Overtemperature
Module Faults
PC
2-20ms typ.
f (VIN)
50Ω
SW1, 2, & 3
PR
shown in
SW2
SW3 1K
"Fault" position
5.7Vdc
–In
(0-3mA)
1.23
Vdc 6K
+Out
+S
SC
–S
–Out
Figure 2—PC/SC module alarm logic.
"Module
4kΩ
Enabled"
+In
+Out
PC
+S
SC
PR
–S
–In
–Out
Figure 3—LED on-state indicator.
Fault
5.7V
PC
SC 1.23V
40µs typ.
2-20ms typ.
Figure 4—PC/SC module alarm timing.
Optocoupler
4kW
+In
+Out
PC
+S
SC
PR
–S
–In
–Out
+In
+Out
PC
+S
SC
PR
–S
–In
–Out
1.00V
Alarm
Figure 5—Isolated on-state indicator.
Figure 6—Secondary side on-state indicator.
Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715
V375B15C300B DC-DC Converter
Set your site on VICOR at www.vicorpower.com
Rev. 3
Page 4 of 8