Diodes Incorporated

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3W Mono Class D

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The PAM8304 is a mono, filter-less, Class-D amplifier with high SNR (signal-to-noise ratio) and differential input that helps eliminate noise. The PAM8304 supports 2.8V to 6V operation, which makes it ideal for up to 4-cell alkaline battery applications. The PAM8304 is capable of driving speaker loads as low as 3Ω with a 5V supply, maximizing the output power.

The device’s over 90% efficiency and small PCB area make the PAM8304 Class-D amplifier ideal for portable applications. The output uses a filter-less architecture, minimizing the number of external components in the PCB area whilst providing a high-performance, simple, and lower cost system.

The PAM8304 features short-circuit protection, thermal shutdown, and undervoltage lockout.

The PAM8304 is available in the U-DFN3030-8 (Type E) and MSOP-8 packages.


  • Supply Voltage from 2.8V to 6.0V
  • 3Ω Driving Capability
  • 0W@10% THD Output with a 4Ω Load and 5V Supply
  • High Efficiency Up to 90% @1W with an 8Ω Load
  • Shutdown Current < 1μA
  • Superior Low Noise Without Input
  • Short-Circuit Protection
  • Thermal Shutdown
  • Available in Space-Saving U-DFN3030-8 (Type E) and MSOP-8 Packages
  • Pb-Free Package
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/


  • MP4/MP3
  • GPS
  • Set-top-boxes
  • Tablets/digital photo frames
  • Electronic dictionaries
  • Portable game machines

Product Specifications

Product Parameters

Minimum VDD (V) 2.8
Compliance (Only Automotive supports PPAP) Standard
AEC Qualified No
Maximum VDD (V) 6 V
IQ (mA) 5 mA
Power/CH (W) @ THD=10% 3
Power/CH (W) @ THD=1% 2.4
Mono or Stereo Mono
Class-D or AB D
Power Limit No
Anti-Sat No
Headphone Out No
Efficiency (%) 93 %
Volume/ Gain Rin adjustable
Gain Min N/A dB
Gain Max 300k?/RI dB
PSRR 70 dB
Special Feature N/A

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