For a Mosfet, power loss measurement in time is given below. Pdm is 150W. Thermal impedance...
For a Mosfet, power loss measurement in time is given below. Pdm is 150W. Thermal impedance characteristics of the MOSFET is also shown below figure. tl and T are 1 usecond and 5 u second respectively. The case temperature is measured as 95 C. What is the peak junction temperature respecting the case temperature? Pm 0 t1 T 10 D-0.50 1 Thermal Response (Zuc) 0.1 R R, 0.20 0.10 0.05 0.02 0.01 с 2 0.01 Ri(°C/W) i (sec) 0.371 0.000272 3 0.337 0.001375 0.337 0.018713 Notes: 1. Duty Factor D=t1/t2 2. Peak T-Pdm * Zthjc + T. Ciri-Ri SINGLE PULSE -(THERMAL RESPONSE) 0.001 1E-006 1E-005 0.01 0.1 0.0001 0.001 ,, Rectangular Pulse Duration (sec)