PAM8303D
Ultra Low EMI, 3W Filterless
Mono Class-D Audio Power Amplifier
Key Features
n
Ultra Low EMI, -20dB Better Than FCC
Class-B @ 300MHz
n
High Efficiency up to 90% @1W with an 8 Ω
Speaker
n
Shutdown Current <1 μ A
n
3W@10% THD Output with a 4 Ω Load at 5V
Supply
n
Demanding Few External Components
n
Superior Low Noise without Input
n
Supply Voltage from 2.8V to 5.5 V
n
Short Circuit Protection
n
Thermal Shutdown
n
Available in Space Saving Packages:
1.45mmx1.45mm WCSP9, MSOP-8, DFN 3x3
n
Pb-Free Package
General Description
The PAM8303D is a 3W mono filterless class-D
amplifier with high PSRR and differential input
that eliminate noise and RF rectification.
Features like 90% efficiency and small PCB area
make the PAM8303D class-D amplifier ideal for
cellular handsets. The filterless architecture
requires no external output filter, fewer external
components, less PCB area and lower system
costs, and simplifies application design.
The PAM8303D features short circuit protection
and thermal shutdown.
The PAM8303D is available in 9-ball WCSP,
MSOP-8 and DFN 3x3 8-pin packages.
FCC
Class B
Applications
n
n
n
n
n
n
Cellular Phones/Smart Phones
MP4/MP3
GPS
Digital Photo Frame
Electronic Dictionary
Portable Game Machines
Level
(
dBuV
/
m
)
80
70
60
50
40
30
20
10
0
30.00 100.00
200.00
300.00
400.00
500.00
600.00
700.00
800.00
900.00
1000.00
(
MHz
)
EMI vs Frequency
Typical Application Circuit
Power in
to PVDD pin
to VDD pin
1μF
1μF
10μF
1μF
1μF
Ci
IN
Single-ended
Input
Ci
ON
OFF
Ri
IN-
VDD
PVDD
Ci
IN-
OUT-
Differential
Input
IN+
OUT+
ON
OFF
Ri
IN-
VDD
PVDD
OUT-
PAM8303D
Ri
IN+
SD
GND
Ci
Ri
IN+
PAM8303D
OUT+
SD
GND
Power Analog Microelectronics
,
Inc
www.poweranalog.com
09/2008 Rev 1.4
1