PT2004

2.2W x 2 Class-D Audio Power Amplifier

DESCRIPTION

The PT2004 is a CLASS-D power amplifier designed

for audio equipments, maximum output power can

reach up to 2.2W x 2 (VDD=5V, RL=4Ω, THD=10%).

The PT2004 composed of exclusively designed

CLASS-D circuitry (patented) by PTC, along with the

most advanced semi-conductor fabricate technology.

When compared to the traditional CLASS-AB

amplifiers, the PT2004’s shows much higher efficiency

(> 80%), low heat dissipation, and also performs

superior audio quality.

The PT2004’s external circuitry is simple and easily

accessible, and consists of flawless self-protection

capabilities. The chip’s packaging is small, thus it

occupies an insignificant amount of space on the

circuit board; therefore, making it the predominant

choice when it comes to audio amplifiers.

APPLICATIONS

• Mobile phone

• Portable Media Player

• Personal Navigation Device

• Hands-free phone

FEATURES

• CMOS Technology

• Stereo differential analogue input

• Maximum output power 2.2W(4Ω) × 2 @ THD=10%

• Output low-pass LC filter is not necessary

• Low EMI radiation, CISPR 22 regulation Compliant

• 4 level voltage gain selection

• Contains shutdown function for individual channel

• Fast start-up time (3.5ms) when shutdown awake up

• Built-in short circuit protection

• Built-in over-temperature protection

• High efficiency (85%, 8Ω load), low heat dissipation

• Wafer level WLCSP 16 balls package

BLOCK DIAGRAM

PT2004 internal block diagram (diagram shows single channel only)

A1

R4

R3

INL+

INL-

A2

Vref

SQ -WAVE

Generator

Vref

A3

Vref

Comp

Gate

Driver

PVDD

OUTL+

PGND

PVDD

OUTL-

PGND

And

Control

Logic

G1

SDR

Power

Management

R1

R2

G0

SDL

Vref

AGND

AVDD

300K

300K