Switch Mode Transformers (Oxford AQA IGCSE Physics)

Switch Mode Transformers

• Switch mode transformers have the following properties:

  • Operate at very high frequencies of alternating potential difference

    • These frequencies can range from 50 kHz to 200 kHz

  • Lighter and smaller than a regular transformer operating at 50 Hz

    • This is because it uses a ferrite core, which is less dense than iron

  • Very little electrical power is wasted when it is switched on but not connected to a load

    • This makes it efficient for applications where it is not used all the time

    • The transformer does not get hot

• These properties make this type of transformer useful in phone and laptop chargers