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Theory

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Procedure

Simulation

Posttest

References

Feedback

Performance measurement and analysis of DC-DC buck regulator

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Answer the questions given below (refer Fig.1):

Fig. 1. Circuit configuration of buck converter.

1. Which of the following statement is true for a buck converter?

a: The output voltage is lower than the input voltage. Explanation

Explanation

b: The output current is lower than the input current. Explanation

Explanation

c: The output power is higher than the input power. Explanation

Explanation

d: It reduces the switching frequency. Explanation

Explanation

2. The output voltage expression for a buck converter is

a: V_o=DV_in Explanation

Explanation

b: V_o=(1-D)V_in Explanation

Explanation

c: V_o=1/(1-D)V_in Explanation

Explanation

d: V_o=DV_in2 Explanation

Explanation

3. The load voltage of a buck converter can be controlled by varying the:

a: inductor position Explanation

Explanation

b: firing angle Explanation

Explanation

c: extinction angle Explanation

Explanation

d: duty cycle Explanation

Explanation

4. If ‘T_ON’ is the switch-ON time of PWM signal and ‘D’ is its duty ratio, then the operating frequency is:

a: T_ON/D Explanation

Explanation

b: T_OFF/D Explanation

Explanation

c: D/T_OFF Explanation

Explanation

d: D/T_ON Explanation

Explanation

5. Find the load voltage when the duty cycle of buck converter is 55 % and input voltage is 100 V.

a: 45 V Explanation

Explanation

b: 55 V Explanation

Explanation

c: 65 V Explanation

Explanation

d: 75 V Explanation

Explanation

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