PAM8905

Document number: DS37026 Rev. 2 - 2

2 of 9

www.diodes.com

May 2015

© Diodes Incorporated

PAM8905

A Product Line of

Diodes Incorporated

1.9W Class-D Audio Amplifier with Integrated

Boost Converter and Battery Tracking AGC

Pin Descriptions

Pin Name

Pin Number

Description

PVDD

A1

Boost Converter Output and Class D Amplifier Power Supply

OUT+

B1

Amplifier Positive Audio Output

OUT-

C1

Amplifier Negative Audio Output

PGND

D1

Class-D Power Ground

SW

A2

Boost Convertor Switching

AGC

B2

AGC Inflection Point Select

Connect to VBAT, GND or Float. Voltage at AGC pin is only read at device power-up.

A power cycle is required to change inflection points.

EN

C2

Device Enable

Set to logic high to enable

AGND

D2

Analog Ground

BGND

A3

Boost Converter Power Ground

VBAT

B3

Supply Voltage

IN+

C3

Positive Audio Input

IN-

D3

Negative Audio Input

Block Diagram

+

-

PWM

Modulator

UVLO

Startup

Protec tion

OSC

Gate

Driv e

Gate

Driv e

SCP

OTP

DCP

VREF

IN+

IN-

OUT+

OUT-

Bias

EN

AGC

PGND

Boos t Conv ertor

PVDD

SW

AGND

BGND

AGC