PC104pPWR28
 14-34V based Power Supply
PCI-104. PC104p, and PC104 Stacks





The PC104pPWR28 power supply provides for the +5, +3.3, +12, minus 12 and minus 5 from a 28V supply, battery etc. Each rail is fuse protected. The supply uses switching technology to provide high efficiency coupled with low pass filtering to provide low noise and fast response to transient loads.

Aircraft and other systems use 28V power to operate equipment. The PC104pPWR28 has a wide input range to operate with 14 - 34 V power. It is possible to operate at voltages between 12 and 14, however in this range the PC104pPWR12 is recommended. The reference power is converted to 12VDC. The 12VDC is fuse protected and tied to the PC104 stack connection. The pre-fuse 12V power is also connected to the 5V, 3.3V, -5V and -12V power supplies. All rails are protected with resettable fuses.

The PCI VIO is programmable allowing 5V or 3.3V PC104p cards to be used. Many PC104p and PCI-104 cards are universal and can work with 3.3 or 5V PCI definitions. A shunt is provided for the user to select 5V or 3V operation.

The power is routed from the power supplies to connectors with mini-planes each of which is rated for more than the maximum draw. The total power dissipation is limited to the external power supply capabilities. Each rail can draw to the maximum to cover situations where the power utilization is not balanced. 8A max current on 5V, 8A max current on 3.3V, 4A max current on -12, 4A from +12V 4A max on minus 5V. The VIO is selected from the 3.3 or 5V supply and is included in the 8A available on those rails. Please note that special builds can be done to remove unused power supplies for your production requirements.

The default is for the -12V and -5V power rails to be energized followed by 3.3 and 5V power rail. The rails are delayed relative to one another by several mS to reduce the inrush current requirement.

The reference voltage is connected to the power supply through a pair of right angle connectors. PC104pPWR28 has a right angle board mount connector. The cable side is also right angle for convenient cable routing in your chassis. Two 28V, and two ground pins are used to allow for a flexible cable internal to the PC104 chassis. Each pin can handle the full rated load at the lowest voltage providing at least 50% margin in the power path.

The mating connector and a 12" long 20 AWG cable are included with the PC104pPWR28 for easy connection to your power connector. Please contact us for longer or shorter wire lengths or termination to the power connector of your choice.

LED´s are provided on the 3.3, 5V, +12V, -12V and -5V rails for an easy visual check.

For chassis with Fans installed the PC104pPWR28 has 4 fan power positions available to provide an easy to connect to 12V source for the fans. The 2 pin headers or direct wire connections can be made to the fans; it is envisioned that the rear surface of the power supply would be used to provide a direct path to the fans.

Power capabilities and requirements are determined by the client´s situation. PC104pPWR28 can supply the maximum power on each rail as specified above with certain limitations. Please see the manual for a more complete discussion. The basics are that the input power must exceed the output power plus the power consumed by the power supply. The Power28 design is very efficient with better than 90% efficiency at most loads. For example with 8A on the 5V rail 40W of output power are desired. 40/.9 = 44.44 W input power required. At 28V 1.6A would be required [steady state]. At 14V, 3.18 A would be required. The input current should be calculated based on the required output power consumed and reference voltage. The first stage of the power supply converts from the reference voltage to 12V. The 12V is used to power the secondary supplies. The 12V current is limited to 18A max. 44.44/12 => 3.71A which is well under the limit for the 12V.

If you have custom requirements please call or e-mail us with the details.

PC104pPWR28 Features

  • Size
    		•  Standard PCI-104. PC104p, PC104

  • Voltages Supplied
    		•  +5, +3.3, +12, -12V -5V, and VIO

  • VIO
    		•  VIO is programmable by the user via shunt to 5V or 3.3V.

  • Protection
    		•  Self Healing fuses on each rail, over-voltage protection

  • Indicators
    		•  LEDs are provided on each power rail 3.3V, 5V, 12V, M12V, M5V

  • Cabling
    		•  Pre-wired mate to PC104pPWR28 is available for ease of connection within your system.

  • Thermal
    		•  The PC104pPWR28 is based on switching power supplies for minimal heat dissipation and maximum power transfer to the PCI-104, PC104p or PC104 stack. Efficiency is a function of load. In many cases no cooling will be required, in high load, and high temperature or high altitude systems cooling requirements should be considered. The PC104pFAN board can provide forced air cooling for the PC104 stack. The PC104pPWR28 has heavy internal planes - 4oz copper to handle the current and spread the heat. The ground planes are tied to the PC104 mounting holes to make use of the PC104 stack for cooling to the external chassis wall. The PC104p Chassis is designed to transfer heat in the PC104 spacers to the end plates of the chassis.


    PC104pPWR28 Benefits

  • Power
    		•  Energize all of the rails in your design with a single power supply.

  • Price
    		•  The PC104pPWR28 is cost effective, and ready to use. Just plug in and attach the supplied cable. Low system cost due to easy installation, easy to achieve cooling requirements, and reliability keep your installed price low. Quantity discounts are available.

  • Warranty
    		•  1 year warranty

  • Ease of Use
    		•  The PC104pPWR28 is easy to use. A Plug and Use interface to the PCI-104, PC104p or PC104 stack.

  • Availability
    		•  We work to keep the PC104pPWR28 in stock. Send in your order and in most cases have your hardware the next day - delivered to you via FedEx.

  • Size
    		•  Complies with standard PCI-104, PC104p and PC104 dimensions

  • Compatibility
    		•  The PC104pPWR28 is PCI-104, PC104p and PC104 compliant per the specification. All Dynamic Engineering PC104p Modules are compatible with the PC104pPWR28.



    Ordering Information
  • PC104pPWR28: Standard PC104pPWR28 with both PCI and ISA connector and all of the power supply rails populated. Standard leaded solder used.
  • -ROHS: change to ROHS processing.
  • -NM5 delete minus 5V capability
  • -P delete PC104 connector leaving only PCI side connector, also removes Minus 5V supply


    Board Options

    Quantity
    Manual
    You must have Adobe Acrobat to read our PDF files.
    Download the     PC104pPWR28 Manual in PDF format.



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