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In electronics, switching frequency refers to the rate at which an electronic switch performs its function. Switching frequency is an important design and operating parameter in systems such as:

• The Class-D amplifier, an audio power amplifier with a switched-mode output.
• Various types of electric power conversion equipment:
  • Boost converter
  • Buck–boost converter
  • Buck converter
  • Chopper
  • Switched-mode power supply
  • Power inverter
• Motor controls, such as Variable-frequency drives

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This frequency is also used in different types of DC-DC converters like Battery Discharge Regulator, Universal Bus Regulator, Auxiliary Bus Regulator etc., switching frequency refers the switch on or off the circuit in the particular frequency