DERATING ELECTRICAL STRESS ANALYSIS REPORT FOR THE SAM POWER SUPPLY. Prepared by

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1 DERATING ELECTRICAL STRESS ANALYSIS REPORT FOR THE SAM POWER SUPPLY Prepared by Sample Company 111 Foothill Blvd. Suite E-156 La Canada Flintridge, California Copyright 2002 by Probabilistic Software, Inc. July 2002

2 TABLE OF CONTENTS Section Title Page 1.0 INTRODUCTION AND SUMMARY Scope Objectives APPLICABLE DOCUMENTS Military Documents Sample Company Documents DERATING STRESS ANALYSIS REQUIREMENTS Derating Analysis Requirements Derating Stress Calculations Environmental Requirements DERATING STRESS ANALYSIS Method of Analysis Junction Temperature Measure of Stress Stress Derating Analysis Data Stress Calculations Stress Analysis Data Format Stress Derating Limits Stress Analysis Results 9 Copyright 2002 by Probabilistic Software, Inc. 2

3 TABLE OF CONTENTS Figure Title Page 1 SAM Power Supply Functional Block Diagram 5 Appendix A Parts Derating Stress Analysis Data Tabulation for the A-1 SAM Power Supply Copyright 2002 by Probabilistic Software, Inc. 3

4 1.0 INTRODUCTION AND SUMMARY This document presents the Sample Company Parts Derating Electrical Stress Analysis Report performed on the SAM Power Supply. It was prepared in accordance with MIL-STD-975M, NASA Standard Electrical, Electronic, and Electromechanical (EEE) Parts List derating criteria. The results of this analysis indicate that all of the SAM Power Supply parts are within the specified limits of MIL-STD-975M, Appendix A. This statement is fully supported by the parts application and derating stress data presented in the Appendix A of this report. This example is not a complete report. The remaining text, mathematical models and detailed appendix data tables will be provided upon the purchase of this report. Continue to scroll down to view example appendix data tables. Copyright 2002 by Probabilistic Software, Inc. 4

6 Page 1 RELIABILITY STRESS DERATING ANALYSIS System: SAM Power Supply Assembly: Converter Schematic No.: Part Ambient Temperature, Worst Case: Degrees Celsius Environment: SF Prepared By: J. Smith Stress Electrical and Thermal Stress Ratio Ref. Description/ Type/ Specification Remarks Desig. Part Number Value Actual Maximum Derating Derated Actual Rated Factor Derated U1 Intgrtd Ckt. LSTTL Mil-Std-883/ Quadruple 2-Input Positive-NAND 54LS00 H FP Class B-1 Gates. Supply Voltage Power Dissipation (Watts) Input Voltage Junction Temperature ( C.) Tc = 55 C.; θjc = 22 C./Watt. Output Current (Amperes): Pin Pin Pin Pin U2 Intgrtd Ckt. LIN BIP Mil-Std-883/ Linear, Voltage Comparators. LM139AJ H DIP Class B-1 Supply Voltage Power Dissipation (Watts) < 0.1 Input Voltage Junction Temperature ( C.) Tc = 55 C.; θjc = 28 C./Watt. Output Current (Amperes): Pin Pin Pin Pin CR1 Diode General Mil-S-19500/ 1N Purpose 116 JANTX Junction Temperature ( C.) Tc = 55 C.; θjc = 120 C./Watt. PIV Power Dissipation =.002 Watts. Surge Current (Amperes) Forward Current (Amperes) < 0.1 VR1 Diode Zener/ Mil-S-19500/ Iz Derated (Amps.) = 1N4461 Avalnch 406 JANTX Iz Nom (Iz Max. - Iz Nom.) Iz Nom. = , Iz Max. = Junction Temperature ( C.) Tc = 55 C.; θjc = 125 C./Watt. Power (Watts) < 0.1 Zener Current (Amperes) < 0.1 Q1 Transistor NPN/PNP Mil-S-19500/ 2N2222A 225 JANTX Junction Temperature ( C.) Tc = 55 C.; θjc = 70 C./Watt. Power (Watts) < 0.1 Voltage Current (Amperes) < 0.1 Q2 Transistor NPN/PNP Mil-S-19500/ 2N2907A 291 JANTX Junction Temperature ( C.) Tc = 55 C.; θjc = 98 C./Watt. Power (Watts) < 0.1 Voltage Current (Amperes) < 0.1 R1 Resistor 1.00K Mil-R-39008, S RCR07G102JS Ohms Insltd Fxd Comp Maximum Operating Temp. ( C.) Power (Watts) < 0.1 Voltage < 0.1 Copyright 2002 by Probabilistic Software, Inc. 6

7 Page 2 RELIABILITY STRESS DERATING ANALYSIS System: SAM Power Supply Assembly: Converter Schematic No.: Part Ambient Temperature, Worst Case: Degrees Celsius Environment: SF Prepared By: J. Smith Stress Electrical and Thermal Stress Ratio Ref. Description/ Type/ Specification Remarks Desig. Part Number Value Actual Maximum Derating Derated Actual Rated Factor Derated R2 Resistor Mil-R-39007, P RWR74S1210FP Ohms Power Fixed WW Maximum Operating Temp. ( C.) Power (Watts) < 0.1 Voltage R3 Resistor Mil-R-39035, P RJR24FW501P Ohms Trimmer NonWW Maximum Operating Temp. ( C.) Power (Watts) < 0.1 Voltage R4 Resistor Mil-R-83401,Mil M83401/01 Ohms Netwrk Fxd Film Maximum Operating Temp. ( C.) Power (Watts) Voltage C1 Capacitor Mil-C-39014, P CKR06BX104KP nf Ceramc,Gen.Pur. Maximum Operating Temp. ( C.) Voltage C2 Capacitor Mil-C-39001, P CMR06F471JPDP pf Mica, Dipped Maximum Operating Temp. ( C.) Voltage < 0.1 C3 Capacitor Mil-C-39006, P Slug,Hermetic Construction. CLR73BH330KGP uf Tntlm Elctrlytc Maximum Operating Temp. ( C.) Voltage C4 Capacitor Mil-C-39003, P CSR13F476KP uf Tntlm Elctrlytc Maximum Operating Temp. ( C.) Voltage T1 Transformer Power Mil-T-27,Mil TF4R03GA203 Audio,Pwr,HiPwr Maximum Operating Temp. ( C.) Voltage L1 Coil Variabl Mil-C-15305,Mil CL3500GA203 Fxd and Var, RF Maximum Operating Temp. ( C.) Voltage J1 Connector 20 Ga. Mil-C-24308,Mil 22 Active Contacts. G06 Series Rack and Panel Parameter: Applied stress of less than 50 volts Current per Contact (Amperes) is negligible. Copyright 2002 by Probabilistic Software, Inc. 7

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