PAM8404 Datasheet, PDF (1/18 Pages) Power Analog Micoelectronics – 3W/CH Filterless Stereo Class-D Audio Amplifier

PAM8404
3W/CH Filterless Stereo Class-D Audio Amplifier
Features
Description
n 3W Output at 10% THD with a 4Ω Load and
5V Supply
n Supply Voltage from 2.5V to 5.5 V
n Efficiency Up to 89%
n Superior Low Noise without Input
n Few External Components to Save the Space
and Cost
n Short Circuit Protection
n Thermal Shutdown
n Space Saving Packages :
2mm X 2mm WCSP
4mm X 4mm Thin QFN
n Pb-Free Packages
Applications
n LCD Monitor / TV Projector
n Notebook Computers
n Portable Speakers
n Portable DVD Players, Game Machines
n Cellular Phones/Speaker Phones
The PAM8404 is a 3W high efficiency filterless
class-D audio amplifier in 4mmX4mm QFN 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 A-weighted noise floor.
PAM8404 is available in QFN 4mmx4mm and
WCSP 2mmx2mm packages.
Typical Application Circuit
VDD
1 0μF
1μF
INR+
0. 22μ F
INR+
PVDD
PGND
OUTR+
I NR-
0.2 2μF
INR-
OUTR-
ON
OFF
SDR
G1
G1
PAM8404
ON
OFF
SDL
G0
G0
INL+
0. 22μ F
INL+
OUTL+
INL-
INL-
0 .22μ F
AVDD
AGND
OUTL-
1μF
10μF
VDD
Radiated Emissions
FCC Class B Limit
Power Analog Microelectronics,Inc
www.poweranalog.com
1
03/2009 Rev 1.1