PST21A Datasheet, PDF (4/13 Pages) Power System Technology – AC-DC 1200W Conduction cooled

Parallel opera�on & current share
Input Power Break - PST21A-5300-48150-550-3V375
Parrallel opera�on is possible in the same unit or between different
units for Miniboards, Maxiboards and Dual Maxiboards with ac�ve cur-
rent sharing through the PR signal. The outputs put in parallel MUST be
exactly the same, all OUT+ connected together and all OUT- connected
together when PR are linked (risk of damage otherwise) .
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 fails, the remaining ones s�ll delivers the power to the
loads.
Redundant opera�on requires external oring diodes.
Hold-up �me
The psu provides internal hold-up �me.
Output Current Limita�on
20ms at 230Vac output 568W
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 _{Inrush current at 115Vac - PST21A-5300-48150-550-3V375}
the value.
Thermal Considera�ons
When a converter is mounted in conduc�on cooled, the temperature
measured on the baseplate should not exeed 100°C.
When heatsink op�on is used in convec�on cooling and is opera�ng at
its nominal output power at the max. ambiant temperature, the tempe-
rature measured on the heatsink should not exceed 100°C.
Thermal protec�on
A temperature protec�on (OTP) is integrated in each output module,
disabling output when baseplate temperature exceeds 105°C (+/-5°C).
The converter automa�cally restarts, when the temperature drops be-
low 70°C . Nevertheless, exceeding the max opera�ng temperature may
cause failures of the converter.
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).
Auxiliary Func�ons
Inrush current at 230Vac - PST21A-5300-48150-550-3V375
Remote On/Off (INHIB)
An isolated INHIB signal disables corresponding output voltage when
connected to RTN. - outputs inhibited : INH level LOW
Output Voltage Adjustment (ADJ)
Output can be ajusted 90-110%Vnom. with the poten�ometer at the
output side or by an external voltage 0,6 to 1,25V max. referred to
RTN.
PST21A
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