Introduction

A Class D audio amplifier is basically a switching amplifier or PWM amplifier. There are a number of different classes of amplifiers. This class of amplifiers is a switching or PWM amplifier as mentioned above. This class of amplifiers is the main focus of this application note. In this type of amplifier, the switches are either fully on or fully off, significantly reducing the power losses in the output devices. Efficiencies of 90-95% are possible. The audio signal is used to modulate a PWM carrier signal which drives the output devices, with the last stage being a low pass filter to remove the high-frequency PWM carrier frequency.

Catalog

Ⅰ TPA3110D2 Description

The TPA3110D2 is a 15-W (per channel) efficient, Class-D audio power amplifier for driving bridged-tied stereo speakers. Advanced EMI Suppression Technology makes it possible to achieve EMC standards while using low-cost ferrite bead filters at the outputs. An adjustable power limiter and a DC detection circuit are SpeakerGuardTM speaker protection circuitry features. The user can set a "virtual" voltage rail lower than the chip supply with the adjustable power limiter to restrict the current going through the speaker. When input capacitors are destroyed or there are input shorts, the DC detect circuit checks the frequency and amplitude of the PWM signal and turns off the output stage.

Stereo speakers can be driven by the TPA3110D2 at a low 4. The TPA3110D2, with a 90% efficiency rating, does not require an external heat sink when playing music.

Additionally, the outputs are completely shielded from shorts to GND, VCC, and output-to-output. An auto-recovery feature is part of the heat protection and short-circuit protection.

Ⅱ TPA3110D2 Pinout

Figure1-TPA3110D2 Pinout

Figure1-TPA3110D2 Pin function

Ⅲ TPA3110D2 Features

• 15-W/ch into an 8-Ω Loads at 10% THD+N From a 16-V Supply
• 10-W/ch into 8-Ω Loads at 10% THD+N From a 13-V Supply
• 30-W into a 4-Ω Mono Load at 10% THD+N From a 16-V Supply
• 90% Efficient Class-D Operation Eliminates Need for Heat Sinks
• Wide Supply Voltage Range Allows Operation From 8 V to 26 V
• Filter-Free Operation
• SpeakerGuard™ Speaker Protection Includes Adjustable Power Limiter Plus DC Protection
• Flow Through Pin Out Facilitates Easy Board Layout
• Robust Pin-to-Pin Short Circuit Protection and Thermal Protection With Auto Recovery Option
• Excellent THD+N / Pop-Free Performance
• Four Selectable, Fixed Gain Settings
• Differential Inputs

Ⅳ TPA3110D2 CAD Model

Symbol

Figure2-Symbol

Footprint

Figure3-SFootprint

3D model

Figure4-3D model

Ⅴ TPA3110D2 Parameters

Ⅵ TPA3110D2 Simplified Application Schematic

Figure5-TPA3110D2 Simplified Application Schematic

Ⅶ TPA3110D2 Application

• Televisions
• Consumer Audio Equipment

Ⅷ TPA3110D2 Evaluation Module

The TPA3110D2 Evaluation Module (EVM) is a hardware platform designed by Texas Instruments (TI) to evaluate and demonstrate the features and capabilities of the TPA3110D2, which is a stereo, efficient, digital amplifier power stage for driving speakers.

The TPA3110D2 is part of TI's audio amplifier portfolio and is known for its energy efficiency and high-quality audio reproduction. It uses Class-D amplifier technology, which allows for higher efficiency compared to traditional linear amplifiers. This makes it suitable for various audio applications where power efficiency is crucial, such as portable speakers, soundbars, and automotive audio systems.

Ⅸ How To Use TPA3110D2 on Evaluation Module?

The Texas Instruments TPA3110D2 dual-channel filterless class D amplifier IC is separated by the TPA3110D2 module. The module contains all the necessary peripheral components for this IC to operate properly.

The module itself is produced by several companies, hence its pinout and layout are not standardized. Almost always, the inputs and outputs are labeled. The figure below provides an illustration.

Figure6-TPA3110D2 on Evaluation Module

The input is made up of the R, L, and GND pins. Despite having two differential inputs, each pin's negative counterpart is grounded on the IC. A separate audio amplifier can be used for each R and L input. They are made to connect to stereo audio outputs, like those from TRR sockets, though.

The IC can be powered by a 9V battery at the lower end because it can accept voltages between 8 and 24 volts. However, a supply voltage of at least 16V is needed to deliver the full 15W per channel output power.

The module divides the IC's two sets of outputs into R+, R-, L+, and L-. There is a differential output on each "R" and "L" channel that can be directly connected to the two pins of a speaker.

Some modules also have a heatsink to lower operating temperatures while using all of their power. To avoid overheating, it is also advised to run the module with proper airflow.

Ⅹ TPA3110D2 PDF

TPA3110D2 Datasheet