CPCIAC Datasheet, PDF (3/9 Pages) Power System Technology – Standard product AC-DC CompactPCI® 300W

Parallel opera�on & current share
Hold up �me
Parrallel opera�ng is possible for V1, V2 with ac�ve current sharing.
The signals SHARE are single wire. All V1 SHARE of the different psu in
parrallel will have to be connected together. (Same for V2 SHARE).
Redundant Systems Opera�on
When systems require a very high level of reliability and should work
normally in the event of a failure, N+1 redundancy is implemented
where N is the number of converter to support power requirement.
If one converter fail, the remaining ones s�ll delivers the power to the
loads.
Redundant opera�on is directly provided without need of external
diodes and is made internally by an ac�ve MOFSET circuit.(reduc�on
of losses).
Hold-up �me
The converters provide internal hold-up �me (see curve).
Hot Swap
The unit incorporates ac�ve limita�on by MOFSET with very low value ^{Inrush current Ac�ve Limita�on}
of inrush current allowing hot swap opera�on. See curve.
Output Current Limita�on
All outputs are con�nously protected against short-circuit by a constant
current limita�on (no foldback) with automa�c recovery. See Page 2 for
the value.
Thermal Considera�ons
When a converter is mounted in free air, convec�on cooling and is ope-
ra�ng at its nominal output power at the max. ambiant temperature,
the temperature measured on the heatsink should not exeed 95°C. The
dera�ng curves show the max power available from the converter ver-
sus ambiant temperature.
Thermal protec�on & degrade signal
A temperature protec�on (OTP) is integrated in the unit, disabling
output when heatsink temperature exceeds 90°C (+/-5°C). The con-
verter automa�cally restarts, when the temperature drops below 55°C
(+/-5°C). Nevertheless, exceeding the max opera�ng temperature may
cause failures of the converter.
A degraded signal (DEG), open collector, is provided when temperature
exceed 80°C +/-5°C(ac�ve low) and is reset below 70°C +/-5°C. This can
be monitored external system to reduce power and avoid thermal pro-
tec�on. DEG is opened when temperature is within opera�ng range.
Overvoltage protec�on
An OVP is incorporated on each output. All outputs are cut if an OVP
is detected. This protec�on is latch style (Recovery a�er AC reset or
inhibit).
Output
+5V
+3V3
+12V
-12V
OVP value
5,66V
3,80V
13,6V
-13,6V
Output power ambiant 2ms + 4ms
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CPCI AC Rev. 00
Page 3 of 9
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