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Low dose failures of hardened DC-DC power convertersBox-level total dose testing of the FOG (Fiber Optic Gyro) by IXSEA at ESA's GammabeamFacility were abruptly terminated at 8krad (Si) due to catastrophic failure (complete shutdown). This was unexpected because all components within the gyro were supposedly radiation tolerant. Further testing showed that the components responsible for the failure were two DC-DC converters, manufactured by Interpoint, that stopped regulating shortly before shutdown. This paper summarizes diagnostic test results for the converters to determine the underlying cause of the unexpected failure at low levels of radiation.
Document ID
20060029796
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Lehman, J.
Yui, C.
Rax, B. G.
Miyahira, T. F.
Weideman, M.
Schrick, P.
Swift, G. M.
Johnston, A. H.
Date Acquired
August 23, 2013
Publication Date
July 15, 2002
Subject Category
Space Radiation
Distribution Limits
Public
Copyright
Other
Keywords
Interpoint Rad-hard DC-DC power converter TC4426 MOSFET driver

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