PAM8403 Mini Two-channel 2X3W Class D Audio Power Amplification Module


This miniature PAM8403 3W Class D audio amplifier module offers low THD+N, allowing it to achieve high-quality sound reproduction, all in a form factor about the size of a US postage stamp! The new filterless architecture allows the Stereo Audio Amplifier to drive the speaker directly, requiring no low-pass output filters, thus saving system cost and PCB area. With the same number of external components, the efficiency of the Digital Subwoofer AmplifierPAM8403 is much better than that of its Class-AB cousins. 2 Channel Mini Audio Amplification Board can extend the battery life, which makes it well-suited for portable applications. D Class Power Amplifier can be used in any DIY design requiring a miniature audio amplifier, especially portable and mobile applications operating on battery power.


  • Can use the computer USB port, USB power bank, or a mobile phone charger to supply the 5V support power
  • Battery power can also be used
  • Can provide 3W (left channel) + 3W (right channel) output power into a 4Ω speaker load and 5V power supply
  • CMOS class D amplifier design for high efficiency and low cost
  • The noise-canceling circuit built into the amplifier board
  • Power on / off without popping noise
  • The module has short-circuited current protection, under-voltage lockout, and over-temperature protection (shuts down at an internal temperature of 140C +/- 15C)


Pin NameDescription
+OUT_LLeft Channel Positive Output
-OUT_LLeft Channel Negative Output
INLLeft Channel Input
INRRight Channel Input
-OUT_RRight Channel Negative Output
+OUT_RRight Channel Positive Output
5VPositive Supply
GNDGround Pin


Operating voltage2.5V-5.5V
Speaker Load4-8 Ohms
High Efficiency90%
Size21 x 18 x 3.4 mm (L x W x H)
Net weight1g


  • Bluetooth Stereo Audio hands-free/headsets
  • In robots that speak or generate sounds to indicate activities
  • Portable Speakers
  • LCD Monitors / TV Projectors
  • Arduino or Raspberry Pi Game Machines
  • Speaker Phones


Download the Datasheet for PAM8403 Audio Power Amplification Module from the link given below.