PA4401

Click-Pop Suppression Device

ANALOG PRODUCTS DIVISION

561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715

www.protekanalog.com

95025. Rev0.0 12/10; PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT

NOT FOR USE IN LIFE SUPPORT SYSTEMS

Output

Startup

&

Shutdown

Control

Input

Vcc

PA4401

Pre

Amp

Input

Pre

Amp

Output

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

Pin Layout and Description

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

Figure 1: Functional block diagram of PA4401

Ordering Information

Temperature

Range

Package

Part Number

SOIC-8

PA4401DQ-T7

-40 to 85 °C

DFN-6

PA4401DN-T7

SEL Logic

System Voltage

SEL Status

9V

Ground

12V

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

SOIC-8

1

2

3

4

5

6

7

8

In 1

In 2

SEL

GND

Out 2

Out 1

DFN-6

1

2

3

4

5

6

7

8

In 1

In 2

SEL

GND

Out 2

Out 1