Diodes Incorporated
SO 16

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PAM8403 (Not Recommended for new design)

NRND = Not Recommended for New Design

3W Stereo Class D

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The PAM8403 is a 3W, class-D audio amplifier. It offers low THD+N, allowing it to achieve high-quality sound reproduction. The new filterless architecture allows the device to drive the speaker directly, requiring no low-pass output filters, thus saving system cost and PCB area. With the same numbers of external components, the efficiency of the PAM8403 is much better than that of Class-AB cousins. It can extend the battery life, which makes it well-suited for portable applications. The PAM8403 is available in SOP-16 package.


  • 3W Output at 10% THD with a 4Ω Load and 5V Power Supply
  • Filterless, Low Quiescent Current and Low EMI
  • Low THD+N
  • Superior Low Noise
  • Efficiency up to 90%
  • Short Circuit Protection
  • Thermal Shutdown
  • Few External Components to Save the Space and Cost
  • Pb-Free Package
  • Application(s)

  • LCD Monitors / TV Projectors
  • Notebook Computers
  • Portable Speakers
  • Portable DVD Players, Game Machines
  • Cellular Phones/Speaker Phones
  • Product Specifications

    Product Parameters

    Anti-Sat N/A
    Compliance (Only Automotive supports PPAP) No
    BTL N/A
    Class-D or AB D
    Efficiency (%) 87
    Gain Max 24
    Gain Min N/A
    Headphone Out N/A
    IQ (mA) 8
    Maximum VDD (V) 5.5
    Minimum VDD 2.5
    Minimum VDD (V) 2.5
    Mono or Stereo Stereo
    Power Limit N/A
    Power/CH (W) @ THD=1% 2.56
    Power/CH (W) @ THD=10% 3.2
    PSRR -58
    AEC Qualified No
    SE N/A
    SNR 80
    Special Features N/A
    Volume/ Gain Fixed

    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