PVCC

PVCC

GAIN1

6

AVCC

7

8

AGND

9

GVDD

OUTNL

BSNL

BSNR

OUTNR

23

22

21

20

TPA3110D2-Q1

FAULT

2

LINP

3

4

LINN

5

GAIN0

PVCCL

BSPL

OUTPL

PGND

27

26

25

24

PLIMIT

10

RINN

11

12

RINP

13

NC

PGND

OUTPR

BSPR

PVCCR

19

18

17

16

PBTL

14

PVCCR

15

GND

29

PowerPAD

SD

1

PVCCL

28

PVCC

100 F

0. 1 F

1000 pF

100 F

0. 1 F

1000 pF

Audio

Source

Control

System

100 k

10

1 k

FB

FB

0.22 F

1000 pF

0.22 F

1000 pF

1 F

m

1 F

m

0. 22 F

FB

FB

1000 pF

1000 pF

0. 22 F

10 k

10 k

1 F

m

1 F

m

1 F

m

1 F

m

1 F

m

TPA3110D2-Q1

SLOS794B – SEPTEMBER 2012 – REVISED SEPTEMBER 2015

www.ti.com

8 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

8.1 Application Information

The TPA3110D1-Q1 device is an automotive class-D audio amplifier. It accepts either a stereo single ended or

differential analog input, amplifies the signal, and drives up to 15W across two bridge tied loads, usually stereo

speakers. Because an analog input is needed, this device is often paired with a codec or audio DAC if the audio

source is digital.

The four digital input/output pins, GAIN0, GAIN1, SD, and FAULT, can be pulled up to PVCC. When connecting

these terminals to PVCC, a 100 k

Ω-resistor must be put in series to limit the slew rate. One of four gain settings

is used depending on the configuration of GAIN0 and GAIN1. The SD pin is used to put the device in shutdown

or normal mode. The FAULT pin is used to indicate if a DC detect or short circuit fault was detected. The next

few sections explains design considerations and how to choose the external components.

8.2 Typical Application

Figure 36. Stereo Class-D Amplifier With BTL Output and Single-Ended Inputs With Power Limiting

18

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