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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1514/CH7/EX7.3/ch7_3.sce | |
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initial commit / add all books
Diffstat (limited to '1514/CH7/EX7.3/ch7_3.sce')
| -rwxr-xr-x | 1514/CH7/EX7.3/ch7_3.sce | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/1514/CH7/EX7.3/ch7_3.sce b/1514/CH7/EX7.3/ch7_3.sce new file mode 100755 index 000000000..e1bf99a8a --- /dev/null +++ b/1514/CH7/EX7.3/ch7_3.sce @@ -0,0 +1,18 @@ +//chapter 7
+//example 7.3
+//page 201
+clear;
+clc ;
+//given
+thetaJC=1; //junction to case thermal impedance in degreeC/W
+Tj=90; //junction temperature
+Ta=25; // ambient temperature
+
+Vce=25;//collector to emitter voltage in volts
+Ic=1;//collector current in A
+Q=Vce*Ic; //transistor power dissipation in W
+
+thetaCA=(Tj-Ta)/Q-thetaJC; //case to air thermal impedance (thetaCS+thetaCA)
+
+printf('thetaCA=%.1f degreeC/W',thetaCA)
+disp("Choose small and least expensive heat sink i.e. NC-421")
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