Topic 3

The primary function of Power Supply is to convert

• AC to AC

• AC to DC

• DC to AC

• DC to DC

The primary function of Power Supply is to convert

• electrical to mechanical

• electrical to electrical

• mechanical to electrical

• mechanical to mechanical

Refer to the figure. What mode of operation is this power supply?

• Linear

• Switching

• AC to DC

• DC to AC

Waveform B is known as the

• AC

• rectified wave

• ripple

• DC

SMPS is able to regulate ______. (Hints: There are 2 answers)

• AC to DC

• DC to DC

• DC to AC

• AC to AC

An SMPS has a 9V input and a 5V output. It is using a ____ (Hints : 2 answers)

• buck converter

• boost converter

• buck-boost converter

• money converter

An SMPS has a typical efficiency of

• 10%

• 30%

• 50%

• 90%

Which 2 answers describe the advantages of SMPS?

• Smaller in size

• More complex

• Lower efficiency

• Higher noise

A buck converter has Vin = 10V and duty cycle of 65%. What is Vout? (Hints : Vout = Vin.d)

• 6.5V

• 3.5V

• 4.5V

• 10V

A buck-boost converter step-DOWN its input voltage Vin when the duty cycle, d, is

• 30%

• 50%

• 70%

• 100%