APPLICATIONS

Basic Class D amplifier

Class-D amplifiers are very common in audio applications due to the low quantities of components needed, high-power output, and good thermal performance. This block diagram is a basic overview of the class-D amplifiers in the market.

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/ Enhancing Sound, Simplifying BOMs

For audio enthusiasts, class-D amplifiers provide a host of advantages compared to class-AB amplifiers. Also called switching amplifiers, class-D amps use less power and generate less heat. They’re also smaller in package size and have high power capacity. In class-D amplifiers, MOSFETs and other transistors act as switches rather than linear gain devices. EMI and sound quality should be carefully considered when specifying components.

/ Application Considerations

When designing class-D amplifiers, engineers should take the following into account:

  • System cost
  • Quality of the sound
  • EMI and transient protection
  • Output-stage protection
  • High-current capability 

/ Block Diagram

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