13-9. An ideal class-B output stage operates from power supply rails of ±12V. As

ID: 2085470 • Letter: 1

Question

13-9. An ideal class-B output stage operates from power supply rails of ±12V. Assuming the default power transistors and heat sinks, and assuming worst-case power dissipation determine: (a) Smallest RL that the circuit can drive without exceeding the TJMAX limit of the transistors. (b) If a junction safety factor TJ = 20o C is imposed, what is the PD(worst) for each transistor, VL (worst case) and the maximum allowed output voltage VL? (c) For the VL (max)identified by part (b) determine the IS drawn from the power rails and case temperature TC of each transistor

Explanation / Answer

25W power transistor with TJMAX = 155 oC, cooled by ‘top hat’ heat sink with CA = 9.8oC/W. Default ambient temperature TA = 25oC.

Answers: (a) 1.68, (b) 7.33W, 7.64V, 4.64V

Navigate

13-9 13-9 13-9 teo, except that C Corporation owns 20% of D Corporation Form of

13-9: Replacement Analysis Problem 13-10 Replacement Analysis St. Johns River Sh

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.

13-9. An ideal class-B output stage operates from power supply rails of ±12V. As

Question

Explanation / Answer

Related Questions

Navigate