300V Datasheet, PDF (10/14 Pages) Powerbox – 5 0 - 5 0 0 WAT T S - D C / D C C O N V E R T E R S

Primary Control - PC PIN
Module Enable/Disable
The module may be disabled by pulling PC to 0V (2.3V max)
with respect to the –Input. This may be done with an open
collector transistor, relay, or optocoupler. Converters may be
disabled with a single transistor or relay either directly or via
“OR’ing” diodes for 2 or more converters. See Figure 2.
Primary Auxiliary Supply
During normal operation only, the PC Pin can source 5.7V
@ 1.5mA. In the example shown in Figure 4, PC powers a
module enabled LED.
+IN
PC
Disable
PR
–IN
Disable = PC <2.3V
Figure 2 — Module enable/disable
+OUT
+S
SC
–S
–OUT
300V Input
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,
Input Undervoltage) 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 3 and 5.
+IN
PC
PR
–IN
SW1
Auto
Restart
2-20 ms typ.
f (VIN)
SW1, 2, & 3
1M
shown in
"Fault" position
5.7V_DC
(0-3mA)
1 _{Not applicable for 300VDC input family}
Input Undervoltage
Input Overvoltage (See Note 1)
Overtemperature
Module Faults
50Ω
SW2
SW3 1k
1.23
V_DC
6k
Figure 3 — PC/SC module alarm logic
+OUT
+S
SC
–S
– OUT
"Module
4kΩ
Enabled"
+IN
+OUT
PC
+S
SC
PR
–S
–IN
–OUT
Figure 4 — LED on-state indicator
Optocoupler
4kΩ
+IN
+OUT
PC
+S
SC
PR
–S
–IN
–OUT
Figure 6 — Isolated on-state indicator
300V Mini Family
Page 10 of 14
Rev 9.5
03/2017
Fault
PC ^5.7V
SC ^1.23V
40µs typ.
2–20ms typ.
Figure 5 — PC/SC module alarm timing
+IN
+OUT
PC
+S
SC
PR
–S
–IN
–OUT
1.00V
Alarm
Figure 7 — Secondary side on-state indicator
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