PAM8403, 5V Dual-Channel Stereo Audio Amplifier Module

(12 customer reviews)

  • On-Board IC: PAM8403
  • Module Pin count: 9
  • IC type: Stereo Audio Amplifier
  • Manufacturer: Generic
  • The package contains: 1 x PAM8403 audio amp module.


** Product image is for reference purpose only.
Pls. refer to Description for more Info.

Module Overview  

 This Audio Amplifier Module is based on PAM8403 which 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.

Key Features: 

  • Low THD+N.
  • Thermal Shutdown.
  • Superior Low Noise.
  • Short Circuit Protection.
  • High amplification efficiency 90%.
  • Works with 2.5V-5v power supply.
  • Output Power: 3 W + 3 W at 4 ohm.
  • Good sound quality & noise suppression.
  • Can use a computer USB power supply directly.
  • Filterless, Low Quiescent Current, and Low EMI.
  • Can directly drive 4 Ohm/8 Ohm small speakers.
  • Dual-channel stereo output 3 w + 3 w power Class D.
  • 3W Output at 10% THD with a 4Ω Load and 5V Power Supply.
  • Small Size, 2.11 x 1.85 cm BOB can easily fit in a variety of products.

Safety Measures:  

NOTE: Violating these safety measures may lead to total product damage and such products are not eligible for refund or replacement.

  • Input audio should be via shielded wire for the best performance.
  • Use properly filtered and regulated power supply.
  • Take care not to short speaker wires else IC will get damaged.
  • Make sure the power supply never exceeds 5.5V else IC will get damaged.
  • The module should be connected with the speaker before it’s powered on, otherwise, the module may damage easily.

Recommended Operating Conditions:  

                        Parameter                            Rating                            Unit 
             Supply Voltage Range                           3.3 to 5.5                                V 
     Operation Temperature Range                          -40 to +85                               °C 



  • It’s better to add a ferrite chip bead at the outgoing line of the speaker for suppressing the possible electromagnetic interference.
  • Using a Li-Ion battery without BMS and charge controller will probably damage the module. Therefore, it’s recommended to use a Li-Ion battery with a TP4050 module or Buck converter, or four Ni-MH (Nickel Metal Hydride) rechargeable batteries or 3 dry or alkaline batteries.
  • One should not make the input signal too large. A large signal can cause the clipping of the output signal when increasing the volume. This will damage the IC because of the big gain of the PAM8403.
  • When testing the PAM8403 module by using a resistor instead of a speaker as the output load, the test results, e.g. THD or efficiency, will be worse than those of using the speaker as load.


SKU: DSM116 Categories: , Tags: , , ,

Based on 12 reviews

4.9 overall

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  1. Shivani Patade (verified owner)

    Good quality

    Shivani Patade

  2. ONLY watching (verified owner)

    Good but this amplifier have no protection. when i gave 6.5v it got damaged.😔
    My money wasted

    ONLY watching