PAM8202
Tiny Package 2 Watt Class-D Stereo Audio Amplifier
DESCRIPTION
The PAM8202 is a 2 Watt per channel, 8-pin, stereo
class D audio amplifier, which offers low THD+N
(0.10%), allowing it to produce high-quality sound
reproduction.
The PAM8202 runs off of a 5 Volt supply at much
higher efficiencies than their class AB cousins,
making it ideal for many portable applications.
The PAM8202 only requires very few external
components (as few as three tiny capacitors),
results in significant cost and board space savings.
The PAM8202 is available in a SOP8 package.
FEATURES
2 Watts @ 10% THD per channel output into
a 4 Ohm load at 5V
Support speakers or earphone (4 to 32 ).
Superior low noise without input.
Supply voltage from 2.5V to 5.5 V.
85% efficiency above.
Short Circuit Protection.
Less output capacitor and inductor to save
the space and cost.
Low THD+N
Low quiescent current < 10 mA
APPLICATIONS
Notebook Computers.
PDAs/GPS Navigator/e-Dictionary
Portable DVD Players, Game Machines.
Cellular Phones,VoIP Phones,Screen Phones
MP3 or PMP Players.
Portable Speaker Systme,Portable Amplifier
LCD monitor / TV.
Bluetooth Car-Kit
TYPICAL APPLICATION CIRCUIT
Vdd
33 H
R
Input
IN_R
0.47 F
10K
VDD
-OUT_R
0.47 F
33 H
+OUT_R
+OUT_L
Speaker
0.47 F
33 H
0.47 F
33 H
0.47 F
IN_L
GND
-OUT_L
0.47 F
Input
L
10K
Speaker
Power Analog Microelectronics, Inc.
CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
1
PAM8202 Rev. 1.1
PRELIMIARY DATASHEET
PAM8202
Tiny Package 2 Watt Class-D Stereo Audio Amplifier
TOP MARKING & PIN CONFIGURATION
8
7
6
5
Absolute Maximum Ratings:
Supply voltage:
6V (Without Input Signal)
Input voltage:
-0.3V to VDD +0.3V
Operation Temperature range:
-40
O
C to 85
O
C
Operation junction temperature:
-40
O
C to 125
O
C
Storage Temperature:
-65
O
C to 150
O
C
Maximum Junction Temperature:
150
O
C
Soldering temperature:
250
O
C, 10 secretary
A Y WW
AYWW
1
2
3
4
Weekly
Year
Assembly Location
SOP8
Recommended operating Conditions:
Supply voltage Range:
2.5V to 5.5V
Operation Temperature Range:
-40
O
C to 85
O
C
Junction Temperature Range:
-40
O
C to 125
O
C
Pin Description
Pin No.
1
2
3
4
5
6
7
8
Pin Name
IN_R
GND
VDD
IN_L
-OUT_L
+OUT_L
+OUT_R
- OUT_R
Description
Right channel audio input.
GNDChip ground.
Supply voltage, need a 1uF ceramic
decouple capacitor very close bet
ween this pin to GND pin.
Left channel audio input.
Inverted output, left channel.
Non-inverted output, left channel
Non-inverted output, right channel.
Inverted output, right channel.
Thermal Information:
Thermal Resistance (
SOP8:
DIP8:
JA
JC
):
90
O
C/W
O
C/W
ORDERING INFORMATION
Ordering
Number
Package
Shipping
2,500 Units/ Reel
PAM8202S8R SOP-8
ELECTRONIC SPECIFICATIONS
PARAMETER
Vdd Range
Vdd Quiescent current
SW On Resistance
SW Frequency
PSRR
Gain
SNR
Input impedance
Each channel
VDD = 5V
No Input Signal
VDD = 2.5V to 5.5V
VDD = 2.5V to 5.5V, 0 input resistor
VDD = 5V, Po = 1.5W, 8
Load
100
0.4
500
-45
10
60
kHz
dB
V/V
dB
K
CONDITION
MIN
2.5
TYP
5
MAX
5.5
10
UNITS
V
mA
Power Analog Microelectronics, Inc.
CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
2
PAM8202 Rev. 1.1
PRELIMIARY DATASHEET
PAM8202
Tiny Package 2 Watt Class-D Stereo Audio Amplifier
BLOCK DIAGRAM
Vdd
C1
Input Signal
Left
1 F
1
Bit
Left
Speaker
Controller
Over Current
C2
Input Signal
Right
1 F
Vdd
C3
1 F
1
Bit
Right
Speaker
Controller
Over Current
TEST CIRCUIT FOR GRAPHS
PAM8202 Demo Board
+OUT
Input
AP System One
Generator
GND
-OUT
VDD
Load
AP
Low Pass
Filter
AUX-0025
AP System One
Analyzer
Power Supply
Notes:
1. The AP AUX-0025 low pass filter is necessary for every class D amplifier measurement done by AP analyzer.
2. A 33uH inductor is used in series with load resistor to emulate the small speaker for efficiency measurement.
Power Analog Microelectronics, Inc.
CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
3
PAM8202 Rev. 1.1
PRELIMIARY DATASHEET
PAM8202
Tiny Package 2 Watt Class-D Stereo Audio Amplifier
(%)
100
50
20
10
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
(W)
(%)
100
50
20
10
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
(W)
Ap
Ap
1
600u
600u
1m
2m
5m
1m
2m
10m
20m
50m
5m
10m
20m
100m
200m
500m
50m
100m
200m
500m
2
3
1
THD+N vs. Output Power
8
(%)
100
50
20
10
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
20
(Hz)
20k
0%
0
Efficiency
THD+N vs. Output Power
4
100%
, 1kHz, VDD = 5V
, 1kHz, VDD = 5V
Efficiency VS Output Power
Ap
80%
60%
40%
20%
1
Power
2
2
3
3
50
100 200
500
1k
2k
5k
THD+N vs. Frequency
8
1.4
1.2
Power Dissipation -W
1.0
0.8
0.6
0.4
0.2
0.0
1
10k
, 500mW output, VDD = 5V
Power Dissipation vs. Output Power
4 , 1kHz, VDD = 5V
(dBr)
+0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
20
0
0.5
1
Output Power -W
1.5
2
(Hz)
50
100
200
500
1k
2k
5k
10k 20k
Power Dissipation vs. Output Power
8
, 1kHz, VDD = 5V
FFT Noise Floor
(16k FFT)
Power Analog Microelectronics, Inc.
CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
4
PAM8202 Rev. 1.1
PRELIMIARY DATASHEET
PAM8202
Tiny Package 2 Watt Class-D Stereo Audio Amplifier
OPERATION INFORMATION
Calculating Output Power of BTL amplifier
Output power is related to supply voltage and the saturation
Vsupply
Vsat
voltage (Vsat). The Maximum peak-to-peak output voltage
on one side of BTL amplifier output is
Vp-p = ( Vsupply 2 X Vsat )
Vp-p
2 2
Vpk-pk
Vrms =
Vsat
Vsupply
One side
Maximum output power of a BTL amplifier with 1% THD is
Pout (1%) = 4 X Vrms
2
/ Rload
Maximum output power of a BTL amplifier with 10% THD is
Pout (10%) = Pout (1%) X 1.25
Output Power vs. Vp-p
BTL Output Power
5.0
Output Power @THD 10%
4.0
4
3.0
2.0
8
1.0
0.0
0
1
2
3
4
Vdd - Vast (V)
5
6
Power Analog Microelectronics, Inc.
CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
5
PAM8202 Rev. 1.1
PRELIMIARY DATASHEET
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