EID226A Unit 4 During tum-on and turm-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, V. =...

EID226A<br>Unit 4<br>During tum-on and turm-off of a power transistor, the<br>Vx<br>current-time and voltage-time relationships are as<br>shown in the adjacent figure. Observe the waveforms<br>50A<br>and calculate,<br>V. = 372 V<br>44) the OFF-state power dissipation (static);<br>45) the switch ON-state power dissipation<br>(static);<br>46) the average switching loss for the OFF<br>transition (dynamic);<br>47) the average switching loss for the ON<br>25μs<br>50us<br>transition (dynamic);<br>Assume a switching frequency of 1kHz with Vx as specified in Appendix A.<br>A SKT40 SCR with thermal impedance characteristic shown below, has rectangular power pulses applied to it.<br>Consider the power pulses (right), the Zthje<br>characteristic (below) and calculate,<br>150<br>48) the rise in junction temperature from time<br>100<br>instant 100ms to the time instant 500ms;<br>50<br>49) the rise in junction temperature from time<br>instant 100ms to the time instant 700ms;<br>0 100 200 300 400 500 600 700 800 900 t<br>50) the rise in junction temperature from time<br>Time in ms<br>instant 100ms to the time instant 900ms;<br>PowerinWatt<br>

Extracted text: EID226A Unit 4 During tum-on and turm-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, V. = 372 V 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 25μs 50us transition (dynamic); Assume a switching frequency of 1kHz with Vx as specified in Appendix A. A SKT40 SCR with thermal impedance characteristic shown below, has rectangular power pulses applied to it. Consider the power pulses (right), the Zthje 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; PowerinWatt
EID226A SKT 40 Zn 0.8 Zin)p = Zmt + Zthiz 0.6 Zth)z [°C/W] 0.4 sin. rec. 360° 180° 0,06 0,10 120° 0,09 0,13 90 0,12 0,17 0.2 60° 0,17 0,22 30 0,25 0,35 0,30 0,35 15° 10 102 10-1 102 Transient thermal impedance vs. time

EID226A<br>SKT 40<br>Zn<br>0.8<br>Zin)p = Zmt + Zthiz<br>0.6<br>Zth)z [°C/W]<br>0.4<br>sin.<br>rec.<br>360°<br>180°<br>0,06<br>0,10<br>120°<br>0,09<br>0,13<br>90<br>0,12<br>0,17<br>0.2<br>60°<br>0,17<br>0,22<br>30<br>0,25<br>0,35<br>0,30<br>0,35<br>15°<br>10<br>102<br>10-1<br>102<br>Transient thermal impedance vs. time<br>

Extracted text: EID226A SKT 40 Zn 0.8 Zin)p = Zmt + Zthiz 0.6 Zth)z [°C/W] 0.4 sin. rec. 360° 180° 0,06 0,10 120° 0,09 0,13 90 0,12 0,17 0.2 60° 0,17 0,22 30 0,25 0,35 0,30 0,35 15° 10 102 10-1 102 Transient thermal impedance vs. time

Jun 11, 2022

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EID226A Unit 4 During tum-on and turm-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, V. =...

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