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    MUR550APFG, MURD550PFG, MUR550PFG, MURF550PFG, NRVUD550PFT4G http://onsemi.com 6 R (t) , TRANSIENT THERMAL RESISTANCE Figure 10. Thermal Response for MUR550PFG 1000 0.0001 0.001 0.01 1.0 100.1 0.000001 t, TIME (s) 10 1 0.1 0.01 Single Pulse 0.5 0.2 0.1 0.05 0.01 0.00001 100 P(pk) t1 t2 DUTY CYCLE, D = t1/t2 Figure 11. Thermal Response, (MURF550PFG) Junction?to?Case (RJC) t, TIME (s) 0.1 10 0.001 1.0 10 100 1000 0.1 0.000001 ZJC(t) = r(t) RJC RJC = 1.6 ?C/W MAX D CURVES APPLY FOR POWER PULSE TRAIN SHOWN READ TIME AT t1 TJ(pk) - T C = P (pk) Z JC(t) P(pk) t1 t2 DUTY CYCLE, D = t1/t2 D = 0.5 0.1 0.05 0.01 SINGLE PULSE 0.2 0.02 1.0 0.01 0.01 0.001 0.0001 0.00001 r(t), TRANSIENT THERMAL RESPONSE (NORMALIZED) ( ? C/W) Figure 12. Thermal Response, (MURF550PFG) Junction?to?Ambient (RJA) t, TIME (s) 0.1 100 0.001 1.0 10 100 1000 0.1 0.000001 ZJC(t) = r(t) RJC RJC = 1.6 ?C/W MAX D CURVES APPLY FOR POWER PULSE TRAIN SHOWN READ TIME AT t1 TJ(pk) - T C = P (pk) Z JC(t) P(pk) t1 t2 DUTY CYCLE, D = t1/t2 D = 0.5 0.1 0.05 0.01 SINGLE PULSE 0.2 0.02 1.0 0.01 0.01 0.001 0.0001 0.00001 r(t), TRANSIENT THERMAL RESPONSE (NORMALIZED) ( ? C/W) 10 |