Low-EMI, Class D Audio Power Amplifiers

The Maxim Class D Advantage

• Spread-spectrum modulation* and active emissions limiting** enable our amplifiers to pass the EN 55022 EMI standard with up to 24 inches of unshielded cable and without external filtering. Learn how...
  
  
  
  
• High integration eliminates many external support components. Integrated functionality in Maxim's Class D audio amplifiers includes:
  
  
  • Robust Current- and Thermal-Overload Protection Circuitry
    
    
  • Industry-Leading Click-and-Pop Suppression Circuitry
    
    
  • Emissions-Limiting Technology
    
    
    
    
• Up to 0.01% THD+N and 80dB PSRR matches Class AB performance while offering Class D efficiencies of > 85%. Learn more...
  
  

• Application Note 3977: Class D Amplifiers: Fundamentals of Operation and Recent Developments
• Application Note 3973: Maxim's Active-Emissions-Limiting (AEL) Circuitry Demystified
• Application Note 3881: Spread-Spectrum-Modulation Mode Minimizes Electromagnetic Interference in Class D Amplifiers
• Application Note 3879: Thermal Considerations for a Class D Amplifier