SpaceVPX System Power Supply Module

Frontgrade’s SPSM-PS is a 125W (nominal) 3U SpaceVPX Power Supply Module designed to plug into the RPS-PS & RPS-9X-PS systems, supporting 28V and 100V inputs and providing 12V system voltages at 125W (nominal). For increased power delivery, the SPSM-PS modules can operate in parallel current sharing functionality.

The System Power Supply Module (SPSM-PS) is a 3U SpaceVPX form factor power supply supporting either unregulated 28V or 100V input power busses and converting to a local 12V (VS1) rail with 125W nominal (288W peak) output power to the RPS-PS and RPS-9X-PS system.  A novel approach to the SPSM-PS is that it combines the VITA 78.0 power supply and 6-channel Power Supply Switch profiles to create a main, unswitched, 12V rail and 6 additional switched 12V rails for the remaining plug-in cards within a single module. Each rail of the SPSM-PS can support up to 100W of continuous power after derating. For applications requiring more power, the SPSM-PS can operate in parallel in a current sharing configuration.

In its standard configuration, the SPSM-PS boasts the following attributes:

Input Power
•    22V to 36V Input range, 28V Nominal 
      o    Alternative 90V to 120V Input range, 100V Nominal
•    42V for 2 seconds Survival Limit (28V nominal input version)
•    150uF Max Input Capacitance 
•    Isolated from secondary > 1 Meg ohm at 50V (28V nominal input version)
•    Pulse Discretes for ON and OFF 
•    MIL-STD-461 Revision G capable 
•    15 pin D-sub Connector

Output Power
•    12V at 288W (peak) 
•    12V at 125W (thermal/reliability nominal) 
•    Seven 12V outputs groups 
      o    Sharable 
      o    Six Switchable Outputs
      o    One non-switchable Output
      o    9A max per group

Mass / Volume / Thermal
•    Mass: less than 600 gm (estimated)
•    Maximum operating temperature: +65°C
•    Efficiency @ 125W Output Power: >90%

OPERATIONAL LIFE / RELIABILITY AND PERFORMANCE
•    System reliability over 0.9
•    Maximum operating temperature: +65°C
•    System SEU rate: No more than one per year for typical LEO Missions
•    TID of 25 krads (Si) or 100 krads (Si) optional assuming 100 mils of shielding with 6061-T6 Aluminum
•    Level-2 parts pedigree per EEE-INST-002 and PEM-INST-001 is available