Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. U-QFN4040-20

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PAM8404

3W Stereo Class D with Separate Shutdown Control

Datasheet

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Description

The PAM8404 is a 3W high efficiency filterless Class-D audio amplifier in 4mmX4mm and 2mmX2mm wafer chip scale (WCSP) packages that requires few external components. Features like 89% efficiency, -63dB PSRR, improved RF-rectification immunity, and very small PCB area make the PAM8404 Class-D amplifier ideal for cellular handset and PDA applications. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the PAM8404. The PAM8404 allows independent gain by summing signals from seperate sources, and has as low as 43μV noise floor. PAM8404 is available in QFN 4mmx4mm and WCSP 2mmx2mm packages.

Feature(s)

3W Output at 10% THD with a 4Ω Load and 5V Supply
Supply Voltage from 2.5V to 5.5V
Efficiency Up to 89%
Superior Low Noise without Input
Few External Components to Save the Space and Cost
Short Circuit Protection
Thermal Shutdown
Space Saving Packages : 2mm X 2mmWCSP 4mm X 4mm Thin QFN
Pb-Free Packages

Application(s)

LCD Monitor / TV Projector
Notebook Computers
Portable Speakers
Portable DVD Players, Game Machines
Cellular Phones/Speaker Phones

Specifications & Technical Documents

Product Parameters

Compliance (Only Automotive Supports PPAP)	Standard
AEC Qualified	No
Input Type	Analog In
Category	Speaker Amplifier
Minimum V_DD (V)	2.5
Maximum V_DD (V)	5.5 V
Mono or Stereo	Stereo
Architecture	Class D
I_{Q (mA)}	11 mA
Minimum Load (Ω)	4
Control Interface	Hardware
Power/CH (W) @ THD=10%	3
Power/CH (W) @ THD=1%	2.4
Headphone Out	No
Efficiency (%)	89 %
SNR	87 dB

Technical Documents

Recommended Soldering Techniques

TN1.pdf

Purchase & Availability

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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-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products