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PCI500-4D

500W Quad Output Power Supply

PCI500-4D

09/2006

Page 2 of 4

GENERAL CHARACTERISTICS

Parameter

Conditions

Min

Typ

Max

Units

Efficiency

48Vdc input, 500W load (dependent upon load profile)

65

%

Switching Frequency

72

kHz

MTBF

Calculated per MIL-HDBK-27F, 25ºC, ground benign

84

khrs

Weight

Unpackaged

3.6

kg

PROTECTION

Parameter

Conditions/Response

Inception

Min

Typ

Max

Units

Thermal Shutdown

Automatic recovery upon restoration to operational temperatures

90

ºC

Output Power Limit

Automatic recovery

530

W

Input Protection

Internal line fuse, Littlefuse BLN 25P ROHS or equivalent

25

A

Over-Voltage Protection

Output V, latching

6.5

Vdc

Output V2, latching

4.3

Vdc

Parameter

Conditions/Response

Output Overload Protection Outputs are individually protected against overloads and indefinite short circuit with automatic recovery upon removal of the fault condition.

Hot-Swap Capability

Design Verification Testing (DVT) confirms that voltage excursions on the output buses resulting from insertion/extraction events do not exceed the

specified maximum of 5%. However, routing of power and signal lines in the mating backplane is critical to minimization of such excursions. In

addition, performance can be critically affected by load characteristics including resistance, negative resistance, and reactive components. While the

control loop responses have been designed for optimum hot-swap performance over a wide range of characteristics, there may be instances where

the voltage excursions exceed published specifications. In such cases, the control loop responses can be modified to perform optimally.

Output Fault Isolation

Output isolation devices are present in all outputs to isolate faults within a failed power supply.

STATUS & CONTROL SIGNALS & INDICATORS

Name

Description

Hot-Swap Enable

Short pin on connector will enable the outputs when the mating pin is tied to DC GND. Supply will not power up until this pin is engaged to its

mate in the backplane. Unit output will be inhibited as pin is disengaged from the mating connector.

Output Inhibit

Secondary referenced; active low, TTL compatible. Logic “0” or short circuit to DC GND inhibits all outputs.

DC Good

Secondary referenced. Open collector signal with an internal 2.2k pull-up resistor is connected to the +5V output. TTL signal will transition

high when all outputs are between 90% and 0% of their nominal voltage.

Remote Sense

Connection of the sense leads across the load at the desired point of regulation will compensate for voltage distribution drops up to 700mV

between the output terminals of the power supply and the point of connection. The unit reverts to local sensing if the sense lines are opened

for any reason. The output is protected against shorted or open leads. Applies to all outputs.

Fan Alarm

Secondary referenced; TTL compatible; active low. Signal transitions to a Logic 0 denotes a thermal warning.

Power Present Indicator LED

A green LED will be illuminated when the input voltage is present and above the minimum requirement.

DC Good Indicator LED

A green LED will be illuminated when the output voltages are within 90-0% of specification, coincident with assertion of the DC Good signal.

This LED will be extinguished if any of the output voltages is outside of this range.

Fan Good Indicator LED

A green LED will be illuminated when the fan is operational, coincident with de-assertion of the Fan Alarm signal. This LED will be extinguished

in the event of a fan failure.

Sync Start

A power supply generated signal used to simultaneously start power supplies connected in parallel when the load on any output exceeds a

single power supply’s capacity for that output. These pins must be bused together at the backplane in parallel/redundant applications (N+n)

when N>. In simple redundant (+) or non-parallel applications (+0), the pin can be ignored.

Power Supply Present

This pin presents a DC ground signal to the mating pin in the backplane. It is intended to be used by the system to detect the presence of a

power supply when the supply is mated into an available position.

OBSOLETE

PRODUCT

Contac

t Fa

ctor

y for

Replac

ement

Model