PA4402

Click-Pop Suppression Device

ANALOG PRODUCTS DIVISION

2929 S Fair Lane, Tempe, AZ, 85282 Tel: (602) 431-8101. Fax: (602) 431-2288

www.protekdevices.com

95029. Rev2. 2/2012;

NOT FOR USE IN LIFE SUPPORT SYSTEMS

Output

Startup

&

Shutdown

Control

Input

Vcc

4402DN

Pre

Amp

Input

Pre

Amp

Output

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

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

Figure 1: Functional block diagram of PA4402

SEL Logic Table

System Voltage

SEL Status

12V

GND

>12.5V

Ordering Information

Temp Range

Package

Part Number

-40 to 85 °C

12 Lead DFN

PA4402-T7

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

External Capacitor

4402DN

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