1

FEATURES

APPLICATIONS

DESCRIPTION

APPLICATION CIRCUIT

_

+

IN-

IN+

PWM

H-

Bridge

Internal

Oscillator

ToBattery

GND

Bias

Circuitry

+

-

Differential

Input

TPA2031D1

SHUTDOWN

A1

A2

A3

B1

B2

B3

C1

C2

C3

IN+

GND

GND

IN-

1,55mm

9-BALL

WAFERCHIPSCALE

YZF PACKAGE

TPA2031D1DIMENSIONS

(TOPVIEWOFPCB)

Note:PinA1ismarkedwitha “0” for

Pb-free(YZF).

1,40mm

1,55mm

1,40mm

TPA2031D1

2.5-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER

• Ideal for Wireless or Cellular Handsets and

2

• Pin-to-Pin Compatibility with TPA2010D1

PDAs

• 32 ms Start-up Time Eliminates CODEC

Click/Pop noise

• Maximum Battery Life and Minimum Heat

The TPA2031D1 is a 2.5-W high efficiency filter-free

–

Efficiency With an 8-

Ω Speaker:

class-D audio power amplifier in a 1,45 mm × 1,45

–

88% at 400 mW

mm wafer chip scale package (WCSP) that requires

–

2.8-mA Quiescent Current

only three external components.

–

0.5-

µA Shutdown Current

Features

like

88%

efficiency,

–75-dB

PSRR,

• Only Three External Components

PCB area make the TPA2031D1 class-D amp ideal

–

Optimized PWM Output Stage Eliminates

for cellular handsets. 32 ms start-up time allows the

LC Output Filter

TPA2031D1

to

share

the

same

GPIO

–

Improved PSRR (–75 dB) and Wide Supply

enable/shutdown control as the CODEC without

Voltage (2.5 V to 5.5 V) Eliminates Need for

passing through the CODEC turn-on pop.

a Voltage Regulator

In cellular handsets, the earpiece, speaker phone,

–

Fully Differential Design Reduces RF

and melody ringer can each be driven by the

Rectification and Eliminates Bypass

TPA2031D1. The TPA2031D1 allows independent

Capacitor

gain while summing signals from separate sources,

and has a low 36

µV noise floor, A-weighted.

–

Improved CMRR Eliminates Two Input

Coupling Capacitors

• Wafer Chip Scale Packaging (WCSP)

–

NanoFree™ (YZF)

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

NanoFree is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2008, 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.