Содержание
- 2. JEDEC Introduction JEDEC was founded in 1960 and stands for the Joint Electron Device Engineering Council.
- 3. JEDEC Introduction JEDEC Philosophy:JEDEC standards and publications are designed to serve the public interest through eliminating
- 4. Examples of standards JESD 22-A103C HIGH TEMPERATURE STORAGE LIFE: The test is applicable for evaluation, screening,
- 5. Examples of standards JESD 22-A104C TEMPERATURE CYCLING: This standard provides a method for determining solid state
- 6. JESD 51 Methodology for the Thermal Measurement of Component Packages JESD51-1 Integrated Circuit Thermal Measurement Method
- 7. JESD 51 cont. JESD51-8 Integrated Circuit Thermal Test Method Environmental Conditions – Junction to Board JESD51-9
- 9. JESD 22-A103C High Temperature Storage Life Scope: Determine the effect of time and temperature, under storage
- 10. Apparatus of Test The apparatus is a temperature controlled chamber capable of maintaining the entire sample
- 11. Method of Testing The samples will be stored at one of the temperature conditions given in
- 12. Method of Testing Typically, the sample is tested under condition B for 1000 hours, but other
- 13. Method of Testing Things to be specified: Sample size and number of failures Time and conditions
- 14. JESD51-12 Guidelines for Reporting and Using Electronic Package Thermal Information θJA junction-to-still ambient air resistance (natural
- 16. Deviations During Application Results during application may vary since the application may differ from the following
- 17. Conduction resistances θjctop, θjcbot – junction to top of case and bottom of case resistances, respectively
- 18. Thermal Characterization Parameter ΨJT – junction to top thermal characterization ΨJB – junction to board thermal
- 19. Compact Models Two-resistor model: good for hand calculations but not really accurate
- 20. DELPHI Compact Models These are mathematical models, not thermal resistance model Provided by some component manufacturers
- 21. Effect of Package Construction on Thermal Results 2s0p: two signal planes, zero power planes on laminate
- 22. Effect of PCB Design More copper to spread heat means better performance.
- 23. Effect of Multiple Packages
- 24. Effect of PCB size On setups where a lot of heat is carried away by the
- 25. Effect of Die Size For the same power, larger dies have a smaller heat flux and
- 26. Effect of Die Power Level As power levels go up, so do surface temperatures. This increases
- 27. Reporting Requirement Examples
- 28. Reporting Requirement Examples
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