From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 1514/CH7/EX7.3/ch7_3.sce | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100755 1514/CH7/EX7.3/ch7_3.sce

(limited to '1514/CH7/EX7.3')

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")
-- 
cgit