Diodes Incorporated
SO 16

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5W Stereo Audio Amplifier with Class D/AB Switch

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The PAM8406 is a 5W audio amplifier with an alternative option between Class-D and Class-AB output which makes PAM8406 very ideally for the applications efficiency-EMI compatible. PAM8406 offers low THD+N, high SNR allowing it to achieve highquality sound reproduction. The fully differential output wi th new filter less architecture (Class-D Mode) allows the device to drive the speaker directly, requiring no low-pass output filters and DC blocking capacitors, thus to save the system cost and PCB area. The efficiency of the PAM8406 is up to 90%. It can extend the battery life, ideally for portable applications. The PAM8406 is fully protected against faults with short circuit protection and thermal protection. The PAM8406 is available in SOP-16L/SOP-16(EP) package.


  • Alternative Output: Class-D or Class-AB
  • 5W Output at 10% THD with a 2Ω Load and 5V Power Supply at Class-D Mode
  • 3W Output at 10% THD with a 4Ω Load and 5V Power Supply
  • Filterless, Low Quiescent Current and No EMI
  • Low THD+N at Fully Output Range
  • Superior Low Noise
  • Efficiency up to 90% with Class-D Mode
  • No Pop At Turn-on/off
  • Fully Short Circuit Protection With Auto Recovery
  • Thermal Shutdown
  • Few External Components to Save the Space and Cost
  • SOP-16L/SOP-16(EP) Package
  • Application(s)

  • LCD TVs
  • Mutimedia Speakers
  • AM/FM System
  • DABs
  • Product Specifications

    Product Parameters

    Minimum VDD (V) 2.5
    Compliance (Only Automotive supports PPAP) Standard
    AEC Qualified No
    Maximum VDD (V) 5.5 V
    IQ (mA) 10 mA
    Power/CH (W) @ THD=10% 5
    Power/CH (W) @ THD=1% 4
    Mono or Stereo Stereo
    BTL Yes
    SE No
    Class-D or AB D+AB
    Power Limit No
    Anti-Sat No
    Headphone Out No
    Efficiency (%) 90 %
    Volume/ Gain Rin adjustable
    Gain Min N/A dB
    Gain Max 142k?/RI dB
    SNR 90 dB
    PSRR 70 dB
    Special Feature Class D or AB switching

    Related Content


    Technical Documents

    Evaluation Boards and User Guides

    Recommended Soldering Techniques


    Product Change Notices (PCNs)

    A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

    PCN # Issue Date Implementation Date Subject
    PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site