Basic Class D amplifier

/ 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