PAM8803 Datasheet, PDF (1/13 Pages) Power Analog Micoelectronics – 3W Filterless Stereo Class-D Audio Amplifier with Digital Volume Control

PAM8803
3W Filterless Stereo Class-D Audio Amplifier
with Digital Volume Control
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 64-step Digital Volume Control
n Superior Low Noise
n Low pop noise
n Efficiency up to 90%
n Short Circuit Protection
n Thermal Shutdown
n Few External Components to Save 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 PAM8803 is a 3W, class-D audio amplifier
with 64-step digital volume control. It offers low
THD+N, allowing it to produce high-quality sound
reproduction. The new filterless architecture
allows the device to drive the speaker directly,
without needing low-pass output filters, which will
save 30% system cost and 75% PCB area.
With the same numbers of external components,
the efficiency of the PAM8803 is much better than
class-AB cousins. It can extend the battery life,
ideal for portable applications.
The PAM8803 is available in a SSOP-24 package.
Typical Application
VD D
C1
1μF
PVDD C3 10μF
C2 1μF
7 18 5
4
VDD GND
+OUT_L
PVDD
2
3
PGND
PGND
+OUT_R
21
SP_L
1 _{-OUT_L}
24
-OUT_R
ON
MUTE
ON
SHDN
C6 ₈
IN L
INL
0 .47μ F
10 _VREF
C8 1μF
PAM8803
INR ^{17 C7}
0.47μF
14
UP
S1
MUTE
SHDN
6 _MUTE
19 _SHDN
NC NC NCNCPVDD
9 11 12 16 20
DN ¹³
S2
RST ¹⁵
PGND PGND
S3
22
23
SP_R
INR
C4 1μF
PVDD C5 10μF
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
12/2009 Rev 1.4