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
PAM8303D
Ultra Low EMI, 3W Filterless
Mono Class-D Audio Power Amplifier
Block Diagram
VDD
IN+
-
+
PWM
Modulator
Gate
Drive
Gate
Drive
PVDD
OUT+
OUT-
IN-
SD
SD
UVLO
SC
Protect
Bias and
Vref
OSC
Startup
Protection
OTP
GND
Pin Configuration & Marking Information
9 Ball WCSP
Top View
IN+
A1
VDD
B1
IN-
C1
GND
A2
PVDD
B2
SD
C2
OUT-
A3
GND
B3
OUT+
C3
Marking
BC
YW
BC: Product Code of PAM8303D
Y: Year
W: Week
Power Analog Microelectronics
,
Inc
www.poweranalog.com
09/2008 Rev 1.4
2
PAM8303D
Ultra Low EMI, 3W Filterless
Mono Class-D Audio Power Amplifier
Pin Configuration & Marking Information
DFN
Top View
1
2
3
4
8
7
6
5
P8303D
XXXXYW
X: Internal Code
Y: Year
W: Week
MSOP-8
Top View
1
8
P8303D
XXXXYW
2
3
4
7
6
5
Pin Number
1
2
3
4
5
6
7
8
Pin name
OUT+
PVDD
VDD
IN-
IN+
SD
Description
Positive BTL output
Power supply
Analog power supply
Negative differential input
Positive differential input
Shutdown terminal ,active low
Ground
Negative BTL output
GND
OUT-
Power Analog Microelectronics
,
Inc
www.poweranalog.com
09/2008 Rev 1.4
3
PAM8303D
Ultra Low EMI, 3W Filterless
Mono Class-D Audio Power Amplifier
Absolute Maximum Ratings
These are stress ratings only and functional operation is not implied
.
Exposure to absolute
maximum ratings for prolonged time periods may affect device reliability
.
All voltages are with
respect to ground
.
Supply Voltage
.
...........................................6.6V
Input Voltage.............................-0.3V to V
DD
+0.3V
Junction Temperature....................-40 °C to 125 °C
Storage Temperature.....................-65°C to 150 °C
Soldering Temperature.................... 250°C,10 sec
Recommended Operating Conditions
Supply voltage Range........................ 2.8V to 5.5V
Max. Supply Voltage (for Max. duration of
30 minutes)................................................6.4V
Ambient Operation Temperature.......-20 °C to 85 °C
Thermal Information
Parameter
Thermal Resistance
(Junction to ambient)
Symbol
Package
WCSP 1.45x1.45
Maximum
90-220
180
47.9
40
NA
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
θ
JA
MSOP
DFN 3x3
Thermal Resistance
(Junction to case)
MSOP
θ
JC
DFN 3x3
Note:
For the 9-pin CSP package, the thermal resistance is highly dependent on the PCB heat sink area.
For example, the θ
ja
can equal to 195 °C /W with 50mm
2
total area or 135 °C /W with 500mm
2
area. When
using ground and power planes, the value is around 90 °C /W.
Power Analog Microelectronics
,
Inc
www.poweranalog.com
09/2008 Rev 1.4
4
PAM8303D
Ultra Low EMI, 3W Filterless
Mono Class-D Audio Power Amplifier
Electrical Characteristic
Symbol
V
DD
Parameter
Supply Voltage
V
DD
=5.0V
THD+N=10%,f=1kHz, R=4Ω
V
DD
=3.6V
V
DD
=3.2V
V
DD
=5.0V
THD+N=1%,f=1kHz, R=4Ω
Po
Output Power
THD+N=10%,f=1kHz, R=8Ω
V
DD
=3.6V
V
DD
=3.2V
V
DD
=5.0V
V
DD
=3.6V
V
DD
=3.2V
V
DD
=5.0V
THD+N=1%,f=1kHz, R=8Ω
V
DD
=5.0V,Po=1W,R=8Ω
V
DD
=3.6V,Po=0.1W,R=8Ω
THD+N
Total Harmonic
Distortion Plus Noise
V
DD
=3.2V,Po=0.1W,R=8Ω
V
DD
=5.0V,Po=0.5W,R=4Ω
V
DD
=3.6V,Po=0.2W,R=4Ω
V
DD
=3.2V,Po=0.1W,R=4Ω
PSRR
Dyn
Vn
Power Supply Ripple
Rejection
Dynamic Range
Output Noise
Common Mode
Rejection Ratio
V
DD
=3.6V, Inputs ac-grounded
with C=1μF
V
DD
=5V, THD=1%, R=8Ω
Inputs ac-grounded
A-weighting
CMRR
V
IC
=100mVpp,f=1kHz
40
30
63
60
dB
f=217Hz
f=1kHz
f=10kHz
f=1kHz
85
f=1kHz
f=1kHz
V
DD
=3.6V
V
DD
=3.2V
T
A
=25 ° C, V
DD
=5V, Gain=2V/V, R
L
=L(33 μ H)+R+L(33 μ H), unless otherwise noted
.
Test Conditions
MIM
2.8
2.85
1.65
1.20
2.50
1.15
0.85
1.65
0.75
0.55
1.3
0.55
0.40
3.0
1.8
1.35
2.66
1.3
1
1.8
0.9
0.7
1.5
0.72
0.55
0.28
0.4
0.55
0.2
0.35
0.5
-63
-62
-52
95
50
100
μV
0.35
0.45
0.6
0.25
0.4
0.55
-55
-55
-40
dB
%
%
W
W
W
W
TYP
MAX
5.5
UNIT
V
No A-weighting
(To Be Cont’d)
Power Analog Microelectronics
,
Inc
www.poweranalog.com
09/2008 Rev 1.4
5
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