Hi! I need to design a heatsink for this circuit. Now I know how this should be done however I am having big problems finding Pdmax for such a circuit which is stopping me from finding a value for the heatsink. Does anyone know any equations I could use to do so?Thanks!

 

Assume your transistor can have a range of currents through it (treat it as a variable resistor). You have two fixed resistors and a voltage source for the series circuit. Which value for the resistance of the ML15003 causes the most power to get dissipated?

 

I'm not sure if I understood you well (I am still relatively a beginner as you can see) however I was told I need to do some integration in order to get Pdmax. Now I know how this was mode for other circuits such as ones which are push-pull...however I am finding this quite confusing!

 

Here is a link to a nice article - http://sound.westhost.com/heatsinks.htm

 

Your amp work in class A so Pdmax = Vce * Ic = 10V * 0.25A = 2.5W