Unit 4 During turn-on and turn-off of a power transistor, the Vx current-time and voltage-time relationships are as shown in the adjacent figure. Observe the waveforms 50A and calculate, 44) the...

Extracted text: Unit 4 During turn-on and turn-off of a power transistor, the Vx current-time and voltage-time relationships are as shown in the adjacent figure. Observe the waveforms 50A and calculate, 44) the OFF-state power dissipation (static); 45) the switch ON-state power dissipation (static); 46) the average switching loss for the OFF transition (dynamic); 47) the average switching loss for the ON transition (dynamic): 25μs 50μs Assume a switching frequency of 1kHz with Vx= 420V as specified in Appendix A. (8) A SKT40 SCR with thermal impedance characteristic shown below, has rectangular power pulses applied to it. Consider the power pulses (right), the Zthjs characteristic (below) and calculate, 150 48) the rise in junction temperature from time 100 instant 100ms to the time instant 500ms; 50 49) the rise in junction temperature from time instant 100ms to the time instant 700ms; 0 100 200 300 400 500 600 700 800 900 t 50) the rise in junction temperature from time Time in ms instant 100ms to the time instant 900ms; (9) PowerinWatt