MTBF TEST REPORT CUSTOMER: GTM MODEL NO.: CUSTOMER NO.: Switching Power Supply DESCRIPTION: PASS RESULT: 2008/6/2 DATE:

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MTBF TEST REPORT CUSTOMER: MODEL NO.: GTM41060-1505 CUSTOMER NO.

1 MTBF TEST REPORT CUSTOMER: MODEL NO.: GTM CUSTOMER NO.: DESCRIPTION: RESULT: DATE: Switching Power Supply PASS 2008/6/2

2 2008/6/4 TYPE : MTBF MIL 217E ROOM TEMPERATURE : 25 TYPE π p RESISTOR CAPACITOR CAPACITOR(ALUMINUM) DIODE MOSFET IC CHOKE TRANSFORMER FUSE 0.04 PCB TOTAL πp = MTBF = Hours / Years

3 TYPE : Resister P / N Item ohm (W) Vp-p πm S T Ab πr πq πe πp R CF R CF R4 1E SMD RA 6E SMD RB 6E SMD R1 5E SMD R2 5E SMD R5 8E SMD R6 8E SMD R SMD R SMD R SMD R E SMD R E SMD R E SMD R SMD R E SMD R E SMD R SMD R SMD R SMD R SMD R SMD R SMD R SMD Total π P πm :Operating Power πr : Resistance Factor S : Ratio of Operating Power to Rated Power ( S=Pm/P ) πp = AbPRPQPE Failures / 10 6 Hours ( Ab = 4.5x10-9 exp(12((t+273)/343))exp(s/0.6((t+273)/273 ) Amd. Page 1

4 TYPE : Capacitor P / N Item (pf) (V) VP S T Ab πcv πq πe πp CX X CY Y C C SMD C SMD C SMD C SMD C SMD C SMD πp :Peak Voltage S : Ratio of Peak to rated Voltage ( S=Vp/V ) πp = AbPcvPQPE Failures / 10 6 Hours Ab = (0.0003((S/0.3) 3 exp((t+273)/358) πcv : Capacitance Factor Amd. Page 2

5 TYPE : Aluminum Capacitor P / N Item (uf) ( V ) VP S T Ab πcv πq πe πp C C C C C C C C Total P P = VP :Peak Voltage S : Ratio of Peak to rated Voltage ( S=Vp/V ) πp = AbPcvPQPE Failures / 10 6 Hours (85 C) (105 C) Ab = ( ((S/0.5) 3 +1)exp(5.09((T+273)/378) 5 Ab = ( ((S/0.5) 3 +1)exp(5.09((T+273)/378) 5 πcv : Capacitance Factor Amd. Page 3

6 TYPE : Diode P / N Item (V) (A) Vm S Tj Ab πt πs πc πq πe πp BD BRIDGE D D D D D ZD Vm : Voltage Applied S : Stress = Vm/V πt : Temperature Factor πs : Electrical Stress Factor πc : Contact Construction Factor πp = AbPTPSPCPQPE Failures / 10 6 Hours =exp(-1925((1/(t+273))-(1/298))) SCR PT : Temperature Factor SCR PR(Pc) : Current Rating Factor =exp(-3082((1/(t+273))-(1/298))) = (Irms)^0.40 Amd. Page 4

7 TYPE : MOSFET P / N Item V Vm S T Ab πt πa πq πe πp Q Vm :Max Voltage πt : Temperature Facto =exp(-1925((1/(t+273))-(1/298))) πa : Application Factor πp = AbPTPAPQPE Failures / 10 6 Hours Amd. Page 6

8 TYPE : IC P / N Item V Vm S T C1 C2 πt πe πq πl πp U PC IC U C1 : Die Complexity Failure Rates C2 : Package Failure Rate for all Microcircuits πt : Temperature Factor πl : Learning Factor πp =(C1PT + C2PE )PLPQ Failures / 10 6 Hours Amd. Page 6

9 TYPE : Choke P / N Item Spec Pm S T Ab πc πq πe πp L NF ( Ab = exp(((T+273)/364)^8.7) πc : Construction Factor πp : AbPCPQPE Failures / 10 6 Hours Amd. Page 7

10 TYPE : Transformer P / N Item Spec πm S T Ab πq πe πp T πp : AbPQPE Failures / 10 6 Hours Amd. Page 8

11 TYPE : Fuse P / N Item V A πm S T Ab πe πp F F πb : Base Failure Rate πp : AbPE Failures / 10 6 Hours 0.04 Amd. Page 9

12 TYPE : PCB P / N Item Spec T Ab N1 N2 πc πq πe πp PCB N1,N2 : Number of PTHS Factor πc : Complexity Factor πp = Ab((N1XPC+N2(PC+13))PQPE Failures / 10 6 Hours Amd. Page 10

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