NEPP DC/DC Converter & Hybrid Working Group Peter Majewicz - - PowerPoint PPT Presentation

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NEPP DC/DC Converter & Hybrid Working Group Peter Majewicz - - PowerPoint PPT Presentation

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NEPP DC/DC Converter & Hybrid Working Group Peter Majewicz ESB/EEE Parts Office NASA LaRC (757).864.4474 June, 2017 peter.majewicz@nasa.gov Key Points Mission: To communicate information on key issues regarding the reliability of

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NEPP DC/DC Converter & Hybrid Working Group

Peter Majewicz ESB/EEE Parts Office NASA LaRC

(757).864.4474 June, 2017 peter.majewicz@nasa.gov

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8/21/2017 2

NEPP DC/DC Converter Workgroup

  • Mission: To communicate information on key issues regarding the reliability of

Hybrid Microcircuits & DC/DC Converters with specific emphasis

  • n

manufacturing, specifications & procurement (both good news and bad news).

  • Monthly Teleconferences
  • First Wednesday of every month @ 1:00p.m. EST
  • Usual Attendees: NASA Centers, Aerospace Corporation, NAVSEA & DLA(L&M)

Key Points

Manufacturer DLA ORGANIZATIONAL INTERFACES

DC/DC –HYBRID Workgroup

PROJECTS

Other Government Space Agencies

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8/21/2017 3

NEPP DC/DC Converter Workgroup

Motivation

* Data compiled from Hi-Rel Laboratories at Space Parts Working Group Conference presentation (2009-2014)

  • Switch Mode Power Supplies (DC/DC Converters)
  • Enormously Complex due to Extreme Miniaturization
  • Paramount Programmatic Penalties [Budget, Time]
  • Manufacturing challenges
  • Assembling hundreds of components using various techniques in a hermetic

package (typically 1in2 – 5in2)

  • Low production numbers
  • High reliability in extreme environments [qualified designs verified by

sampling & screening]

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8/21/2017 4

NEPP DC/DC Converter Workgroup

Classification of DPA Failure Causes – (Percentages)

* Data compiled from Hi-Rel Laboratories presentations at Space Parts Working Group Conference (2009-2016)

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8/21/2017 5

NEPP DC/DC Converter Workgroup

  • General Topics
  • Sharing of data on purchases, requirements, specifications (SMDs vs. SCDs)
  • Customizations by Centers and Product Performance Issues
  • Discussions on Failure Mechanisms, purchase lead time and delay issues
  • Sharing of information on failures, delays, GIDEPs, vendor notifications, etc.
  • Updates from Defense Logistics Agency
  • Audit reviews
  • Moves, Consolidations, New ownership
  • Alternate Methods
  • Review / revising of current Military Specifications
  • Attendance at JEDEC / G-12 Conferences (JC-13* Government Liaison)
  • Attend 13.5 Hybrid Working Group Meetings

Hybrid WG - Key Points

* JC-13 is responsible for standardizing quality and reliability methodologies for solid state products used in military, space, and

  • ther environments requiring special-use condition capabilities beyond standard commercial practices. This includes long-term

reliability and/or special screening requirements.

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8/21/2017 6

NEPP DC/DC Converter Workgroup

Current & Future Actions

  • Audits
  • 6 Class H & K Hybrid Manufacturer Audits since last year
  • Under review during typical audit
  • Review of any current issues
  • Design Analysis: Derating / Stress
  • Failure Analysis (Customer returns)
  • Testing
  • Traceability
  • Organizational QA Program
  • Reports available on NASA SAS website
  • We need to better communication between Projects and WG
  • Target manufacturers projects use
  • Review current project issues
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8/21/2017 7

NEPP DC/DC Converter Workgroup

Current & Future Actions

  • Military Specifications
  • MIL-STD-883 TM 2017 (Hybrid Internal Visual)
  • Foreign Material Control Programs
  • MIL-STD-883 TM 2020 (PIND)
  • New equipment
  • Gen Spec for Hybrids (MIL-PRF-38534)
  • Rev K Draft Revision
  • 27 comments (24 accepted, 2 retracted, 1 still under debate (WCCA)
  • Revision of Periodic Requalification Requirements (<= 5 years)
  • Appendix D (Non-Hermetic Hybrids)
  • 2 new classes (L = higher quality class, F = standard quality class)
  • 3 technologies (cavity, non-cavity and open architecture)
  • Current Issues
  • GIDEPS, DLA & Project Input
  • Continued Communications
  • Need information on procurements, failures, CSI’s , lessons learned, etc.
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NEPP DC/DC Converter Workgroup

DC/DC Converter Cross-Referencing Tool

  • Grouped by QML Manufacturers
  • IR, VPT, Crane, MS Kennedy
  • Lists Standard Microcircuit Drawings (SMD)
  • Variations, Vendor PNs, Power, Outputs…

00522 5962-0052201HXA CRANE MSA2805D/883 DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052201HXC CRANE MSA2805D/883 DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052201HYA CRANE MGA2805D/883 DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052201HYC CRANE MGA2805D/883 DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052201HZA CRANE MGA2805DZ/883 DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052202HXA CRANE SMSA2805D/HO DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052202HXC CRANE SMSA2805D/HO DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 00526 5962-0052601HXA CRANE SLH2805S/HO DC/DC CONVERTER, 1.5 W, 5 V OUTPUT, HYBRID

  • 1.5

1 +5 N/A N/A N/A 5962-0052601HXC CRANE SLH2805S/HO DC/DC CONVERTER, 1.5 W, 5 V OUTPUT, HYBRID

  • 1.5

1 +5 N/A N/A N/A SMD Complete SMD PN Vendor Vendor PN Description RHA Level Power (W) Outputs VOUT1 VOUT2 VOUT3 AOUT 00522 5962-0052201HXA CRANE MSA2805D/883 DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052201HXC CRANE MSA2805D/883 DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052201HYA CRANE MGA2805D/883 DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052201HYC CRANE MGA2805D/883 DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052201HZA CRANE MGA2805DZ/883 DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052202HXA CRANE SMSA2805D/HO DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 5962-0052202HXC CRANE SMSA2805D/HO DC/DC CONVERTER, 5 W, +/-5 V OUTPUTS, HYBRID

  • 5

2 +5

  • 5

N/A N/A 00526 5962-0052601HXA CRANE SLH2805S/HO DC/DC CONVERTER, 1.5 W, 5 V OUTPUT, HYBRID

  • 1.5

1 +5 N/A N/A N/A

  • Goals
  • Add better user-interface
  • Post on NEPP Website by end of summer
  • Post POL version by end of FY
  • VPT, 3D, MDI, e2v, Crane, Microsemi…
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NEPP DC/DC Converter Workgroup

  • Hybrids are considered “High Risk”
  • Mitigation
  • Fostering communication among Government Space Agencies, Manufacturers

and DLA

  • Need involvement from all NASA Centers!
  • Appropriate level of requirements (Procurement)
  • Class H, K, E… (using the Mil-Spec System)
  • PreCap Inspections [Provide data to DLA]
  • Traveler / Test Data Review
  • Appropriate level specifications
  • What do we want to make standard practice WRT Project Requirements/Risk?
  • What gives up the most value with modern budgets/schedules?

Conclusions

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8/21/2017 Document Title 10

QUESTIONS / FEEDBACK