Switch mode Power Supply

1
Switch Mode Power Supply
2
Power Supply-

• Any device that supplies electric power to an
  electric load.
• The different types of power supplies include
• Battery
• DC power supply
• AC power supply

3
Switched Mode Power Supply

• An electrical power supply that incorporates a
  switching regulator to convert electrical power
  efficiently.

4
Advantages of SMPS over Linear Power Supplies

• 1. Lower weight
• 2. Smaller size
• 3. Higher efficiency
• 4. Lower power dissipation

Disadvantages of SMPS
1. Complexity of the circuit
5

• 1. Inverter stage
• The inverter stage converts DC, whether directly
  from the input or from the rectifier stage
  described above, to AC by running it through a
  power oscillator, whose output transformer is
  very small with few windings at a frequency of
  tens or hundreds of kilohertz.
• 2. Output transformer
• If the output required is to be isolated from
  input, the inverted AC is used to draw the
  primary windings of a high frequency transformer.
  This converts the voltage up or down to the
  required output level on its secondary winding.

6
Use of various transformer isolated topologies
7
Applications of SMPS-

• 1. Machine tool industries
• 2. Security Systems
• (Closed circuit cameras)
• 3. Support supplies with PLCs
• 4. Personal Computers

8
Conclusion

• The most common SMPS topologies flyback,
  push-pull, half bridge and full bridge converters
  have been outlined.
• Each has its own particular operating
  characteristics and advantages, which makes it
  suitable to particular applications.
• Some of the most common applications of SMPS have
  been discussed.

9
Keen Ocean Industrial Ltd. Keen Ocean
Industrial Ltd. Flat 3405, 34/F., Cable TV
Tower, 9 Hoi Shing Road, Tsuen Wan, N.T., Hong
Kong. 5, www.keenoceanhk.com 34/F., Cable TV
Tower, 9, Tsuen Wan, N.T., Hong Kong.
email sales_at_keenocean.com.hk Website
10
Thank you!!