PAM8408

Document number: DS36992 Rev. 1 - 2

1 of 11

www.diodes.com

June 2014

© Diodes Incorporated

PAM8408

A PRODUCT LINE OF

DIODES INCORPORATED

2x3W STEREO DIFFERENTIAL INPUT CLASS D

AUDIO AMPLIFIER WITH MEMORY UP/DOWN VOLUME

Description

The PAM8408 is a filter-less Class-D amplifier with high SNR and

differential input that helps eliminate noise. Advanced 32-step

Up/Down volume control minimizes external components and allows

speaker volume control. The gain will held when the chip is in

shutdown mode.

The PAM8408 supports 2.5V to 6V operation make it idea for up to

4 cells alkaline battery applications.

Features like greater than 87% efficiency and small PCB area make

the PAM8408 Class-D amplifier ideal for portable applications. The

output uses a filter-less architecture minimizing the number of

external components and PCB area whilst providing a high

performance, simple and lower cost system.

The PAM8408 built in auto recovery SCP (short circuit protection) and

thermal shutdown.

The PAM8408 is available in SO-16L package.

Features

•

3W Output at 10% THD with a 4Ω Load and 5V Supply

•

2.4W Output at 1% THD with a 4Ω Load and 5V Supply

•

2.5V to 6.0V VDD Operating

•

Fully Differential Input

•

Filter-less, Low Quiescent Current and Low EMI

•

Low THD+N

•

32-Step Memory Up/Down Volume Control from -80dB to 24dB

•

Superior Low Noise: 60uV

•

Minimize Pop/Clip Noise

•

Auto Recovery Short Circuit Protection

•

Thermal Shutdown

•

Pb-Free SO-16L Package

Pin Assignments

SO-16L

LOUTP

LOUTN

UP

VDD

ROUTP

VDD

ROUTN

GND

15

9

10

11

12

13

14

16

GND

RINN

GND

DOWN

LINN

SD

1

2

3

4

5

6

7

8

RINP

LINP

Applications

•

PC Speaker

•

Wireless Speaker

•

Home Sound Systems

•

Active Speakers

•

Docking Stations

Typical Applications Circuit

6 GND

GND 13

5 DOWN

7 LINN

VDD 16

8 LINP

GND 12

1 RINP

ROUTN 14

2 RINN

ROUTP 15

LOUTP 10

VDD 9

4 UP

3 SD

LOUTN 11

PAM8408

01

.

uF

C6

4Ω

1uF

C2

RINN

01

. uF

C8

LINP

SHDN

ON

01

.

uF

C5

RINP

01

.

uF

C7

LINN

4Ω

1uF

C2