PA4401 Datasheet, PDF (1/7 Pages) Protek Devices – Click-Pop Suppression Device

ANALOG PRODUCTS DIVISION
FEATURES
9V or 12V operation
3V RMS Capability
Power-Up and Power-Down “POP” suppression
ESD protected outputs
8-Lead SOIC package
Series operation
Only 1 external component required
Ron (On resistance):
0.8 ohms
Ron Flatness:
0.4 ohms
Total Harmonic Distortion:
<1%
Current drain:
<5mA
Load:
600 ohms
APPLICATIONS
Portable DVD players
Set-top boxes
Car Audio
High End Audio
Televisions
Stereo Systems
Digital Video Recorders
LCD TVs
Home Theater systems
PA4401
Click-Pop Suppression Device
GENERAL DESCRIPTION
The PA4401 provides click-pop suppression for devices that
lack a click-less/pop-less startup or shutdown. The PA4401 is
placed between the codec and the output coupling capacitor.
The click-pop noise is generated at the coupling capacitors
while the system is starting up as well as shutting down.
The PA4401 controls the ramping of the DC voltage into the
coupling capacitors thus reducing the click-pop noise
generated during the startup and shutdown.
The start time can be controlled or changed using an external
capacitor.
ESD protection circuits are provided at the inputs and outputs
of the device.
The PA4401 consumes less than 5mA of current and
provides a THD of less than 1% for a load of 600 ohms.
The PA4401 is available in an 8L-SOIC and DFN-6
Packages.
FUNCTIONAL DIAGRAM
Pin Layout and Description
V_CC 1
In 1 2
In 2 3
SEL 4
SOIC-8
8 _CEXT
V_{CC 1}
7 Out 1
6 Out 2
In 1 2
In 2 3
5 GND _{SEL 4}
DFN-6
Pin
Symbol Designation
1
VCC
Voltage
2
In1
Audio Input 1
3
In2
Audio Input 2
4
SEL
Select 12 or 9Volt Operation
5
GND
Ground
6
Out2
Audio Output 2
7
Out1
Audio Output 1
8
CEXT
External Capacitor
Pre
Amp
Input
Vcc
Output
8 CEXT
7 Out 1
6 ^{Out 2}
Input
Pre
Amp
Startup
&
Shutdown
Control
PA4401
Output
5 GND
Figure 1: Functional block diagram of PA4401
Ordering Information
Temperature
Range
Package
-40 to 85 °C
SOIC-8
DFN-6
Part Number
PA4401DQ-T7
PA4401DN-T7
SEL Logic
System Voltage
9V
12V
SEL Status
Ground
V_CC
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: [phone]. Fax: [phone]
www.protekanalog.com
95025. Rev0.0 12/10; PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT
NOT FOR USE IN LIFE SUPPORT SYSTEMS