PA4402 Datasheet, PDF (1/7 Pages) Protek Devices – Click-Pop Suppression Device

ANALOG PRODUCTS DIVISION
FEATURES
 12V (typical) operation
 3V RMS Capability
 Power-Up and Power-Down “POP” suppression
 ESD protected outputs
 Series operation
 Only 1 external capacitor required
 Ron (On resistance): 3.75 ohms
 Ron Flatness: <0.2 ohms
 Total Harmonic Distortion: <1%
 Current drain: <5mA
APPLICATIONS
 Portable DVD players
 Set-top boxes
 Car Audio
 High End Audio
 Televisions
 Stereo Systems
 Digital Video Recorders
 LCD TVs
 Home Theater systems
Pin Layout and Description
4402DN
XXXX
PA4402
Click-Pop Suppression Device
GENERAL DESCRIPTION
The PA4402 provides click-pop suppression for devices that
lack a click-less/pop-less startup or shutdown. The PA4402 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 PA4402 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 PA4402 consumes less than 5mA of current and
provides a THD of less than 1%.
FUNCTIONAL DIAGRAM
Pre
Amp
Input
Input
Pre
Amp
Vcc
Output
Startup
&
Shutdown
Control
4402DN
Output
Figure 1: Functional block diagram of PA4402
Pin
Symbol Designation
1
Vcc
Voltage
2
In1
Audio Input 1
3
NC
No Connect (Leave OPEN)
4
NC
No Connect (Leave OPEN)
5
In2
Audio Input 2
6
SEL
See SEL Logic Table
7
GND
Ground
8
Out2
Audio Output 2
9
NC
No Connect (Leave OPEN)
10
NC
No Connect (Leave OPEN)
11
Out1
Audio Output 1
12
CEXT
External Capacitor
SEL Logic Table
System Voltage
12V
>12.5V
SEL Status
GND
VCC
Ordering Information
Temp Range
-40 to 85 °C
Package
Part Number
12 Lead DFN PA4402-T7
2929 S Fair Lane, Tempe, AZ, 85282 Tel: [phone]. Fax: [phone]
www.protekdevices.com
95029. Rev2. 2/2012;
NOT FOR USE IN LIFE SUPPORT SYSTEMS