LINP

LINN

RINP

RINN

SD

SD

Fault

Fault

PLIMIT

PBTL

PVCC

8to26V

1 F

m

OUTNL

FERRITE

BEAD

FILTER

OUTPL

15W

FERRITE

BEAD

FILTER

FERRITE

BEAD

FILTER

8W

OUTR+

OUTR-

OUTL+

OUTL-

Audio

Source

TPA3110D2

GAIN0

GAIN1

OUTNR

FERRITE

BEAD

FILTER

OUTPR

15W

8W

FERRITE

BEAD

FILTER

FERRITE

BEAD

FILTER

TPA3110D2

www.ti.com

SLOS528B – JULY 2009 – REVISED JULY 2010

15-W FILTER-FREE STEREO CLASS-D AUDIO POWER AMPLIFIER with

SPEAKERGUARD™

Check for Samples: TPA3110D2

1

FEATURES

APPLICATIONS

•

Televisions

2

•

15-W/ch into an 8-

Ω Loads at 10% THD+N

From a 16-V Supply

•

Consumer Audio Equipment

•

10-W/ch into 8-

Ω Loads at 10% THD+N From a

DESCRIPTION

13-V Supply

•

30-W into a 4-

Ω Mono Load at 10% THD+N

The TPA3110D2 is a 15-W (per channel) efficient,

Class-D audio power amplifier for driving bridged-tied

From a 16-V Supply

stereo

speakers.

Advanced

EMI

Suppression

•

90% Efficient Class-D Operation Eliminates

Technology enables the use of inexpensive ferrite

Need for Heat Sinks

bead filters at the outputs while meeting EMC

•

Wide Supply Voltage Range Allows Operation

requirements. SpeakerGuard™ speaker protection

from 8 V to 26 V

circuitry includes an adjustable power limiter and a

DC detection circuit. The adjustable power limiter

•

Filter-Free Operation

allows the user to set a "virtual" voltage rail lower

•

SpeakerGuard™ Speaker Protection Includes

than the chip supply to limit the amount of current

Adjustable Power Limiter plus DC Protection

through the speaker. The DC detect circuit measures

•

Flow Through Pin Out Facilitates Easy Board

the frequency and amplitude of the PWM signal and

Layout

shuts off the output stage if the input capacitors are

damaged or shorts exist on the inputs.

•

Robust Pin-to-Pin Short Circuit Protection and

Thermal Protection with Auto Recovery Option

The TPA3110D2 can drive stereo speakers as low as

4

Ω. The high efficiency of the TPA3110D2, 90%,

•

Excellent THD+N / Pop-Free Performance

eliminates the need for an external heat sink when

•

Four Selectable, Fixed Gain Settings

playing music.

•

Differential Inputs

The outputs are also fully protected against shorts to

GND, VCC, and output-to-output. The short-circuit

protection

and

thermal

protection

includes

an

auto-recovery feature.

Figure 1. TPA3110D2 Simplified Application Schematic

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

SpeakerGuard, PowerPad are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2009–2010, 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.