PAM8403

Document number: DSxxxxx Rev. 1 - 4

1 of 11

www.diodes.com

November 2012

© Diodes Incorporated

PAM8403

A Product Line of

Diodes Incorporated

FILTERLESS 3W CLASS-D STEREO AUDIO AMPLIFIER

Description

The PAM8403 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.

The PAM8403 is available in SOP-16 package.

Features



3W Output at 10% THD with a 4Ω Load and 5V Power Supply



Filterless, Low Quiescent Current and Low EMI



Low THD+N



Superior Low Noise



Efficiency up to 90%



Short Circuit Protection



Thermal Shutdown



Few External Components to Save the Space and Cost



Pb-Free Package

Pin Assignments

Applications



LCD Monitors / TV Projectors



Notebook Computers



Portable Speakers



Portable DVD Players, Game Machines



Cellular Phones/Speaker Phones

Typical Applications Circuit