PVCC

PVCC

GAIN1

6

AVCC

7

8

AGND

9

GVDD

23

22

21

20

TPA3110D2-Q1

FAULT

2

LINP

3

4

LINN

5

GAIN0

27

26

25

24

PLIMIT

10

RINN

11

12

RINP

13

NC

19

18

17

16

PBTL

14

15

GND

29

PowerPAD

SD

1

28

PVCC

100 F

0. 1 F

1000 pF

100 F

0.1

F

1000 pF

Audio

Source

Control

System

100 k

10

100 kW

(1)

1 k

FB

FB

0. 47 F

1000 pF

0.47 F

1000 pF

AVCC

1 F

m

1 F

m

1 F

m

1 F

m

OUTNL

BSNL

BSNR

OUTNR

PVCCL

BSPL

OUTPL

PGND

PGND

OUTPR

BSPR

PVCCR

PVCCR

PVCCL

AVCC

TPA3110D2-Q1

www.ti.com

SLOS794B – SEPTEMBER 2012 – REVISED SEPTEMBER 2015

Typical Application (continued)

(1)

A 100-k

Ω resistor is needed if the PVCC slew rate is more than 10 V/ms.

Figure 37. Stereo Class-D Amplifier With PBTL Output and Single-Ended Input

8.2.1 Design Requirements

The typical requirements for designing the external components around the TPA3110D1-Q1 include efficiency

and EMI/EMC performance. For most applications, only a ferrite bead is needed to filter unwanted emissions.

The ripple current is low enough that an LC filter is typically not needed. As the output power increases, causing

the ripple current to increase, an LC filter can be added to improve efficiency. An LC filter can also be added in

cases where additional EMI suppression is needed.

In addition to discussing how to choose a ferrite bead and when to use an LC filter, the following sections also

discuss the input filter and power supply decoupling. The input filter must be chosen with the input impedance of

the amplifier in mind. The cut-off frequency should be chosen so that bass performance is not impacted. Power

supply decoupling is important to ensure that noise from the power line does not impact the audio quality of the

amplifier output.

Copyright © 2012–2015, Texas Instruments Incorporated

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