10 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.

10.1 Application Information

These typical connection diagrams highlight the required external components and system level connections

for proper operation of the device. Each of these configurations can be realized using the Evaluation Modules

(EVMs) for the device. These flexible modules allow full evaluation of the device in the most common modes of

operation. Any design variation can be supported by TI through schematic and layout reviews. Visit e2e.ti.com

for design assistance and join the audio amplifier discussion forum for additional information.

10.2 Typical Applications

10.2.1 TPA2015D1 With Differential Input Signals

IN-

IN+

GAIN

ENB

END

GND

VBAT

SW PVOUT PVDD

OUT+

OUT-

AGC

2.2 H

m

6.8 F - 22 F

m

m

TPA2015D1

Differential

Audio Inputs

Gain Control

AGC Control

Boost Enable

Class-D Enable

2.2 F - 10 F

m

m

Connected to Supply

Figure 10-1. Schematic with Differential Input Signals

10.2.1.1 Design Requirements

For this design example, use the parameters listed in Table 10-1.

Table 10-1. Design Parameters

DESIGN PARAMETER

EXAMPLE VALUE

Power Supply

5 V

Enable Inputs

High > 1.3 V

Low < 0.6 V

Speaker

8 Ω

10.2.1.2 Detailed Design Procedure

10.2.1.2.1 Boost Converter Inductor Selection

Working inductance decreases as inductor current and temperature increases. If the drop in working inductance

is severe enough, it may cause the boost converter to become unstable, or cause the TPA2015D1 to reach its

current limit at a lower output voltage than expected. Inductor vendors specify currents at which inductor values

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TPA2015D1

SLOS638C – NOVEMBER 2011 – REVISED JUNE 2022

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Product Folder Links: TPA2015D1