PAM8007
Filterless 3W Class-D Stereo Audio Amplifier
with DC Volume Control and Headphone Output
Key Features
n
3W Output at 10% THD with a 4
Ω
Load and
5V Power Supply
n
Filterless, Low Quiescent Current and Low
EMI
n
Low THD+N
n
64-step DC Volume Control
n
Headphone Output Function
n
Superior Low Noise
n
Low pop noise
n
Efficiency up to 92%
n
Short Circuit Protection
n
Thermal Shutdown
n
Few External Components to Save the
Space and Cost
n
Pb-Free Package
General Description
The PAM8007 is a 3W, class-D audio amplifier
with headphone amplifier. Advanced 64-step DC
volume control minimizes external components
and allows speaker volume control and
headphone volume control. It offers low THD+N,
to produce high-quality sound reproduction. The
new filterless architecture allows the device to
drive the speaker directly, without 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 PAM8007 is muc h better than
class-AB cousins. It can extend the battery life
thus be ideal for portable ap plications.
The PAM8007 is available in a SSOP-24 and SOP-
24 package.
Applications
n
n
n
n
n
LCD Monitors / TV Projectors
Notebook Computers
Portable Speakers
Portable DVD Players, Game Machines
VoIP/Speaker Phones
Typical Application
PVDDL
10
μ
F
1
μ
F
5
0.47
μ
F
2
PGNDL
3
PGNDL
+OUTL
4
PVDDL
8
9
INL
EarInL
INL
0.47
μ
F
-OUTL
-
1
INR
0.47
μ
F
17
0.47
μ
F
INR
EarInR
+OUTR
21
16
24
-OUTR
-
ON
SHDN
ON
MUTE
DC Volume
VDD
1
μ
F
19
6
SHDN
MUTE
PAM8007
13
EarOutR
220
μ
F
220
μ
F
+
+
-
-
11
7
10
V OLUME
12
VDD
VDC
15
Line/Ear
VREF
PVDDR
20
PGNDR PGNDR
22
23
1
μ
F
10
μ
F
Headphone
EarOutL
1
μ
F
14
GND
18
H: Headphone
L: Class D
(de
fault)
Power Analog Microelectronics
,
Inc
www.poweranalog.com
1
01/2012 Rev1.2
PAM [ POWER ANALOG MICOELECTRONICS ]
