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3W Stereo Differential Input Class D with Memory Up/Down Volume Control

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The PAM8408 is a filter-less Class-D amplifier with high SNR and differential input that helps eliminate noise. Advanced 32-step Up/Down volume control minimizes external components and allows speaker volume control. The gain will held when the chip is in shutdown mode.
The PAM8408 supports 2.5V to 6V operation make it idea for up to 4 cells alkaline battery applications.
Features like greater than 87% efficiency and small PCB area make the PAM8408 Class-D amplifier ideal for portable applications. The output uses a filter-less architecture minimizing the number of external components and PCB area whilst providing a high performance, simple and lower cost system.
The PAM8408 built in auto recovery SCP (short circuit protection) and thermal shutdown.
The PAM8408 is available in SO-16L package.


  • 3W Output at 10% THD with a 4Ω Load and 5V Supply
  • 2.4W Output at 1% THD with a 4Ω Load and 5V Supply
  • 2.5V to 6.0V VDD Operating
  • Fully Differential Input
  • Filter-less, Low Quiescent Current and Low EMI
  • Low THD+N
  • 32-Step Memory Up/Down Volume Control from -80dB to 24dB
  • Superior Low Noise: 60uV
  • Minimize Pop/Clip Noise
  • Auto Recovery Short Circuit Protection
  • Thermal Shutdown
  • Pb-Free SO-16L Package


  • PC Speaker
  • Wireless Speaker
  • Home Sound Systems
  • Active Speakers
  • Docking Stations

Product Specifications

Product Parameters

Minimum VDD (V) 2.5
AEC Qualified No
Maximum VDD (V) 6 V
IQ (mA) 8 mA
Power/CH (W) @ THD=10% 3
Power/CH (W) @ THD=1% 2.4
Mono or Stereo Stereo
Class-D or AB D
Power Limit No
Anti-Sat No
Headphone Out No
Efficiency (%) 87 %
Volume/ Gain Up/Down (w/Memory)
Gain Min -80 dB
Gain Max 24 dB
SNR 90 dB
PSRR 70 dB
Special Feature N/A

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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