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Power Actuation and Switching Module DevelopmentThe Deep Space Avionics (DSA) Project is developing a Power Actuation and Switching Module (PASM). This component enables a modular and scalable design approach for power switching applications, which can result in a wide variety of power switching architectures using this simple building block. The PASM is designed to provide most of the necessary power switching functions of spacecraft for various Deep Space missions including future missions to Mars, comets, Jupiter and its moons. It is fabricated using an A SIC process that is tolerant of high radiation. The development includes two application specific integrated circuits (ASICs) and support circuitry all packaged using High Density Interconnect (HDI) technology. It can be operated in series or parallel with other PASMs, It can be used as a high-side or low-side switch and it can drive thruster valves, pyrotechnic devices such as NASA standard initiators, bus shunt resistors, and regular spacecraft component loads. Each PASM contains two independent switches with internal current limiting and over-current trip-off functions to protect the power subsystem from load faults. During turnon and turnoff each switch can limit the rate of current change (di/dt) to a value determined by the user. Threeway majority-voted On/Off commandability and full switch status telemetry (both analog and digital) are built into the module. This paper describes the development process used to design, model, fabricate, and test these compact and versatile power switches. Preliminary test results from prototype HDI PASM hardware are also discussed.
Document ID
20070024848
Acquisition Source
Jet Propulsion Laboratory
Document Type
Preprint (Draft being sent to journal)
External Source(s)
Authors
Wester, Gene W.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Carr, Greg
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Deligiannis, Frank
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Jones, Loren
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lam, Barbara
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Sauers, Jim
(Lockheed Martin Corp. Newtown, PA, United States)
Haskell, Russ
(Lockheed Martin Corp. Newtown, PA, United States)
Mulvey, Jim
(Lockheed Martin Corp. Newtown, PA, United States)
Date Acquired
August 23, 2013
Publication Date
August 16, 2004
Subject Category
Spacecraft Propulsion And Power
Meeting Information
Meeting: 2nd International Energy Conversion Engineering Conference
Location: Providence, RI
Country: United States
Start Date: August 16, 2004
End Date: August 19, 2004
Sponsors: American Inst. of Aeronautics and Astronautics
Distribution Limits
Public
Copyright
Other
Keywords
Power Actuation and Switching Module (PASM)
space environment
power switches
Deep Space Avionics (DSA) Project
radiation tolerance
application specific integrated circuits (ASICs)
High Density Interconnect (HDI) technology

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