CPD200-4530 Datasheet, PDF (8/13 Pages) Power-One – 200 - 250 Watt CompactPCI DC-DC Converters

CPD Series Data Sheet
200 – 250 Watt CompactPCI^® DC-DC Converters
®
Active Current Sharing for Vo1, Vo2, Vo3
The current sharing facility, consisting of a single-wire link,
should be used, where several converters are operated in
parallel connection, for example, high reliability n+1
redundant systems or systems providing higher output
power. Not more than six converters should be connected
in parallel.
Using this feature reduces the stress on the individual
converters and improves the reliablity of the system.
Interconnection of the current sharing terminals causes the
converters to share the output current evenly. In n+1
redundant systems a failure of a single converter will not
lead to a system failure, since the outputs are already
decoupled by FETs and diodes internally.
Passive Current Sharing for Vo4
The output voltage changes slightly with the output current
(droop characteristic) ensuring automatic current sharing
without further precautions, when several converters are
connected in parallel. An increase in output current
decreases the output voltage according to the formula:
V_o = 12 V + (0.5 –
I_o
I_{o nom}
) • 0.96 V
∆V_o
05188a
4%
V_{o set 0}
–4%
Load
regulation
0.01
0.5
I_o/I_{o nom}
1
Fig. 9
Output voltage V_o4 versus output current I_{o 4}.
LEDs
A green LED "Input OK" and a red LED "Fault" are incorpo-
rated in the front panel.
06156a
Input OK
Fault
V_{i min}
V_i
V_{i max}
LEDs "Input OK" and "Fault" status versus input voltage.
Conditions: P_o – P_{o max} , T_C – T_{C max} , V_inh = open
Fault
LED "Fault" status versus output current.
I_O Conditions: Vi min – Vi max, TC – TC max , Vinh = open
I_oL
Fault
LED "Fault" status versus case temperature.
T_C ^{Conditions: P}o ^{– P}o max ^{, V}i min ^{– V}i max ^{, V}inh ^{= open}
T_{C max}
V_{inh threshold}
Fault
LED "Fault" status versus V_inh.
V_{i inh} ^{Conditions: P}o ^{– P}o max ^{, V}i min ^{– V}i max ^{, T}C ^{– T}C max
-2 V
+0.8 V +2.4 V
+50 V
LED off
LED Status undefined
LED on
If +12 V bus voltage is present, LED is on.
Fig. 10
Display status of LEDs
NOV 28, 2006 revised to JAN 29, 2007
Page 8 of 13
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