SMPS & INVERTER

What is the output pin number of switching

regulator IC LM 2576?

• Pin No.2

• Pin No.3

• Pin No.4

• Pin No.5

What is the working voltage range of input

AC supply specified for SMPS?

• 110 VAC to 150 VAC

• 170 VAC to 240 VAC

• 90 VAC to 270 VAC

• 220 VAC to 440 VAC

What is the full form of the abbreviation

CVT?

• Complex Virtual Technology

• Constant Voltage Transformer

• Composite Video Transmission

• Complementary Voltage Terminal

Which power device is used for switching

purpose in computer SMPS?

• SCR

• IGBT

• MOSFET

• Transistor

Which mode of operation the transformer

is connected?

• Buck operation

• Boost operation

• Low cut off mode

• High cut off mode

What type of transformer is used in

automatic voltage stabilizer?

• Auto transformer

• Step up transformer

• Isolation transformer

• Step down transformer

What is the function of series regulator IC

2576 pin No4?

• Control

• AC input

• Feed back

• Frequency output

What is the switching frequency of SMPS

used in computer?

• 5 kHz

• 10 kHz

• 15 kHz

• 20 kHz

Which circuit is provided in control section

of SMPS to drive the power switching transistor?

• Input filter circuit

• Opto isolator circuit

• Rectifier and filter circuit

• Pulse width modulator circuit

Which type of core is used in the SMPS

transformer?

• Air core

• Solid iron core

• Ferrite ceramic core

• Laminated magnetic core