Question

Quiz 12

This flyback converter has the following parameters:

V_S = 5.0 V D = 0.5 N₂/N₁ = 4 Switching Freq f = 150 kHz

C = 20 µF (micro F) L_m = 50 µH (micro H) R = 50 ? (Ohms)

The capacitor is not ideal and has an R_Cesr = 0.4 ? (Ohms).

The switch is not ideal and has Ron = 2 ? (Ohms).

Run a PSpice simulation with t = 6.0ms:

(a) Find the average output voltage V₀ for the above conditions.

        V₀ =  

The goal of this circuit is to deliver an average of 12 Volts to the 50 ? (Ohm) load.

(b) What is the maximum switch resistance that achieves this goal?

        R_switch,max ? (Ohms) =

Answer 1

12. Given, =5.0V D=0.5 N2 = 4 N. f = 150kHz C-20μF R=50Ω Rcer = 0.4Ω t = 6.0ms