ETC PAM8402

Advanced Product Information
PAM8402
2 Watt Class-D Audio
Amplifiers with Enable
Description
Features
The PAM8402 is 2 Watt per channel, 14pin, stereo class D audio amplifier,
whitch offers low THD+N (0.10%),
allowing it to produce high-quality sound
reproduction.
The PAM8402 runs off of a 5 Volt supply
at much higher efficiencies than their
class AB cousins, making it ideal for
many portable applications.
The PAM8402 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 SOP14
package.
•
•
•
•
•
•
•
•
•
•
•
Applications
•
•
•
•
•
•
•
PAM8402 Block Diagram
2 Watts @ 10% THD per channel
output into a 8Ω load at 5V
Support speakers or earphone
(6Ω tο 32Ω).
Superior low noise without input.
Supply voltage: From 2.5V to 6 V.
85% efficiency above.
With Enable Function.
Short Circuit Protection.
Small package outlines: SOP14
Less output capacitor and
inductor to save the space and
cost.
Low THD+N
Low Quiescent current
Notebook computers.
PDAs.
Portable DVD players, game machines.
Cellular phones/speaker phones.
MP3 or PMP players.
Portable speakers, USB speaker.
LCD monitor / TVs.
PAM8402 Pin Assignment
Vdd
C1
Input Signal
1
Bit
Controller
Left
Left
Speaker
1uF
Enable
Over Current
C2
Input Signal
1
Bit
Controller
Right
Right
Speaker
GND
IN _ R
VDD
ENABLE
VDD
1
2
3
4
5
1uF
GND 7
Vdd
14 - OUT _ R
13 N / C
12 GND
11 + OUT _ R
10 + OUT _ L
9 GND
8 - OUT _ L
Over Current
C3
1uF
Power Analog Microelectronics, Inc.
CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
PAM8402 Rev. 0.1
August 2005
1
Advanced Product Information
THD+N vs. Frequency
(8Ω, 500mW)
THD+N vs. Output Power
(8 Ohms, 1 kHz, Vdd=2.5V to 6V)
With an 8-ohm load:
Vdd:
Output Watt:
2.5V
0.35W
4.0V
0.92W
5.0V
1.6W
6.0V
2.2W
Efficiency vs. Output power
(8 Ohms, 1kHz, Vdd = 5V)
Efficiency
90.000%
80.000%
70.000%
60.000%
%
50.000%
40.000%
30.000%
20.000%
10.000%
0.000%
0.000
0.500
1.000
1.500
Output Power
2.000
Power Analog Microelectronics, Inc.
CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
PAM8402 Rev. 0.1
August 2005
2
Advanced Product Information
Package Description PAM8402
D
L2
L
R
R1
(L1)
f1
f2
E
E1
h
f
h
e
b
f3
A A2
A1
f4
A3
COMMON DIMENSIONS
(UNITS OF MEASURE=MILLIMETER)
SYMBOL
A
A1
A2
A3
b
b1
c
c1
D
E
E1
e
L
L1
L2
R
R1
h
f
f1
f2
f3
f4
MIN
1.35
0.10
1.25
0.55
0.36
0.35
0.16
0.15
8.53
5.80
3.80
0.45
0.07
0.07
0.30
0
6
6
5
5
NOM
1.60
0.15
1.45
0.65
0.40
0.20
8.63
6.00
3.90
1.27BSC
0.60
1.04REF
0.25BSC
0.40
-
8
8
7
7
MAX
1 .75
0.25
1.65
0.75
0 .49
0.45
0 .25
0.25
8 .73
6.20
4.00
0.80
0.50
8
10
10
9
9
Note: Package outline exclusive of mold flash and metal burr.
Power Analog Microelectronics, Inc.
CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
PAM8402 Rev. 0.1
August 2005
3