QUESTION #3 [25 Marks]
a) Discuss the operation of the buck-boost converter.
b) The buck-boost circuit shown in figure 3 has the following parameters:
$V_s = 24 \text{ V}$; $D = 0.4$; $R = 5 \Omega$; $L = 20 \mu H$; $C = 80 \mu F$; $f = 100 \text{ kHz}$
Determine,
i. The output voltage.
ii. The average inductor current.
iii. The maximum and minimum values of current in the inductor.
iv. The output ripple voltage.
[7 Marks]
[3 Marks]
[6 Marks]
[3+3 Marks]
[3 Marks]
+\\
$V_s$\
---
+\\
$V_L$\
---
ic\\
+\\
$V_o$\
---
Figure 3