IN-

IN+

PGND

OUT+

OUT-

ToBattery

SDA

SCL

EN

MasterEnable

TPA2028D1

Digital

BaseBand

Analog

Baseband

or

CODEC

PVDD

10 F

m

C

1 F

(Optional)

IN

m

I CClock

2

I CData

2

TPA2028D1

www.ti.com

SLOS660 – JANUARY 2010

3-W Mono Class-D Audio Amplifier with Fast Gain Ramp SmartGain™ AGC/DRC

Check for Samples: TPA2028D1

1

FEATURES

DESCRIPTION

23

•

Fast AGC Start-up Time: 5 ms

The TPA2028D1 is a mono, filter-free Class-D audio

power amplifier with volume control, dynamic range

•

Pin-out Compatible with TPA2018D1

compression (DRC) and automatic gain control

•

Filter-Free Class-D Architecture

(AGC). It is available in a 1,63 mm x 1,63 mm wafer

•

3 W Into 4

Ω at 5 V (10% THD+N)

chip-scale package (WCSP).

•

880 mW Into 8

Ω at 3.6 V (10% THD+N)

The

DRC/AGC

function

in

the

TPA2028D1

is

•

Power Supply Range: 2.5 V to 5.5 V

programmable

via

a

digital

interface.

The

DRC/AGC function can be configured to automatically

•

prevent distortion of the audio signal and enhance

•

Programmable DRC/AGC Parameters

quiet passages that are normally not heard. The

•

DRC/AGC can also be configured to protect the

•

Selectable Gain from –28 dB to 30 dB in 1-dB

speaker from damage at high power levels and

compress the dynamic range of music to fit within the

Steps (when compression is used)

dynamic range of the speaker. The gain can be

•

Selectable Attack, Release and Hold Times

selected from –28 dB to +30 dB in 1-dB steps. The

•

4 Selectable Compression Ratios

TPA2028D1 is capable of driving 3 W at 5 V into 4

Ω load or 880 mW at 3.6 V into 8 Ω load. The device

•

Low Supply Current: 1.8 mA

features hardware and software shutdown controls

•

Low Shutdown Current: 0.2 mA

and also provides thermal and short-circuit protection.

•

High PSRR: 80 dB

The TPA2028D1 has faster AGC gain ramp during

•

AGC Enable/Disable Function

start-up than TPA2018D1.

•

Limiter Enable/Disable Function

In addition to these features, a fast start-up time and

small package size make the TPA2028D1 an ideal

•

Short-Circuit and Thermal Protection

choice for cellular handsets, PDAs and other portable

•

Space-Saving Package

applications.

–

1,63 mm × 1,63 mm Nano-Free™ WCSP

(YZF)

SIMPLIFIED APPLICATION DIAGRAM

APPLICATIONS

•

Wireless or Cellular Handsets and PDAs

•

Portable Navigation Devices

•

Portable DVD Player

•

Notebook PCs

•

Portable Radio

•

Portable Games

•

Educational Toys

•

USB Speakers

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

Fast Gain Ramp SmartGain, Nano-Free are trademarks of Texas Instruments.

3

PRODUCTION DATA information is current as of publication date.

Copyright © 2010, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.