PAM8403 Datasheet, PDF (1/12 Pages) Power Analog Micoelectronics – Filterless 3W Class-D Stereo Audio Amplifier

PAM8403
Filterless 3W Class-D Stereo Audio Amplifier
Key Features
n 3W Output at 10% THD with a 4Ω Load and
5V Power Supply
n Filterless, Low Quiescent Current and Low
EMI
n Low THD+N
n Superior Low Noise
n Efficiency up to 90%
n Short Circuit Protection
n Thermal Shutdown
n Few External Components to Save the
Space and Cost
n Pb-Free Package
Applications
n LCD Monitors / TV Projectors
n Notebook Computers
n Portable Speakers
n Portable DVD Players, Game Machines
n Cellular Phones/Speaker Phones
General 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
to save the 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, ideal for portable applications.
The PAM8403 is available in SOP-16 package.
Typical Application
VDD
PVDD
1μF
1μF
4 70μ F
1μF
0.47μF Ri
I NL
6
VDD
7 _INL
4
13
PVDD PVDD
1
+OUT_L
8
VREF
-OUT_L ³
0.1 μF
0. 47μ F
10
INR
INR
Ri
PAM8403
-OUT_R ¹⁴
SHDN
MUTE
12 _SHDN
5 _MUTE
+OUT_R ¹⁶
GND NC PGNDPGND
11
9
2
15
Efficiency vs Output Power
100
90
80
70
RL=8Ω
60
RL=4Ω
50
40
30
20
10
0
0
0.5
1
1.5
2
2.5
3
Output Pow er(W)
Radiated Emissions
FCC Class B Limit
Power Analog Microelectronics,Inc
www.poweranalog.com
1
09/2008 Rev 1.3