A Product Line of
Diodes Incorporated
PAM8603A
ANTI-SATURATION FILTERLESS 3W CLASS-D STEREO AMPLIFIER
WITH DC VOLUME CONTROL AND HEADPHONE OUTPUT
Description
The PAM8603A is a 3W, Class-D audio amplifier with headphone
amplifier. Advanced 64-Step DC volume control minimizes external
components and allows speaker volume control and headphone
volume control. PAM unique antisaturation technology which detects
output signal clip due to the over level input signal suppress the
output signal clip automatically. Also the antisaturation function can
adapt the output clip caused by power supply voltage down with
battery. It offers low THD+N, to produce highquality sound
reproduction. The new filterless architecture allows the device to
drive the speaker directly, without low-pass output filters which will
save system cost and PCB area.
With the same numbers of external components, the efficiency of the
PAM8603A is much better than Class-AB cousins. It can extend the
battery life thus be ideal for portable applications.
The PAM8603A is available in a SSOP-24 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
• 64-Step DC Volume Control
• Headphone Output Function
• Unique Anti-Saturation Function
• Superior Low Noise
• Low Pop 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
• VoIP/Speakers Phones
PAM8603A
Document number: DSxxxxx Rev. 1 - 2
1 of 16
www.diodes.com
November 2012
© Diodes Incorporated
