Description

1.2 Description

The TPA301 audio power amplifier evaluation module is a complete, low-pow- er single-channel audio power amplifier. It consists of the TI TPA301 350-mW low-voltage audio power amplifier IC along with a small number of other parts mounted on a circuit board that is approximately one and a quarter inches square (Figure 1–1).

Figure 1–1. The TI TPA301 Audio Amplifier Evaluation Module

 

Shutdown

+5 V

GND

 

 

 

 

 

 

 

 

C6

 

 

R5

S1

 

 

C3

C5

 

 

 

 

 

 

 

 

DL

R1

 

 

 

 

 

 

 

 

 

 

OUT–

C2

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

 

U1

R2

 

 

C4

 

 

 

 

 

OUT+

 

 

 

 

 

 

C1

 

 

R3

 

 

Lit.#

 

–3

 

 

SLOP 115

 

 

 

 

 

IN+

 

 

 

 

 

R4

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

 

EVM

 

TPA301

 

 

 

Single in-line header pins are mounted to the underside of the module circuit board to allow the EVM to be plugged into the TI plug-n-play audio amplifier evaluation platform, or to be wired directly into existing circuits and equipment when used stand-alone.

The platform has room for a pair of TPA301 evaluation modules and is a convenient vehicle for demonstrating TI’s audio power amplifier and related evaluation modules. The EVMs simply plug into the platform, which auto- matically provides power to the modules, interconnects them correctly, and connects them to a versatile array of standard audio input and output jacks and connectors. Easy-to-use configuration controls allow the platform and EVMs to quickly model many possible end-equipment configurations.

There is nothing to build, nothing to solder, and nothing but the speakers included with the platform to hook up.

1.3 TPA301 EVM Specifications

Supply voltage range, VDD

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 V to 5.5 V

Supply current, IDD

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

250 mA, max

Continuous output power, PO: 8-Ω

BTL, VDD =5 V:

. . . . 350 mW

32-Ω

BTL, VDD =5 V:

. . . . . 75 mW

Audio input voltage, VI

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. 2 Vpp, max

Minimum load impedance, RL . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . 8 Ω

Introduction 1-3

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Texas Instruments manual Description, TPA301 EVM Specifications
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TPA301 specifications

Texas Instruments TPA301 is a highly efficient, low-power audio amplifier designed for portable audio applications. This device is particularly well-suited for mobile phones, tablets, and other compact audio systems where space is limited but sound quality remains a priority. The TPA301 sits at the intersection of advanced audio technology and user-friendliness, making it a go-to choice for designers seeking a high-performance solution.

One of the main features of the TPA301 is its Class D architecture, which offers superior energy efficiency compared to traditional Class AB amplifiers. This means that less power is wasted as heat, allowing for longer battery life in portable devices. The TPA301 delivers up to 1.5W per channel into an 8-ohm load at low-distortion levels, ensuring that consumers experience clear audio reproduction, even at high volumes.

Furthermore, the TPA301 integrates several advanced technologies, including a built-in digital signal processor (DSP) that enables sophisticated audio processing capabilities. This DSP allows for features like active noise cancellation and equalization, enhancing the listening experience by tailoring the audio output according to the environment. The device also supports various audio inputs, including I2S, PCM, and TDM formats, providing design flexibility for developers.

The TPA301 is designed with a focus on compactness and thermal management, featuring a small package size that makes it ideal for space-constrained applications. Additionally, its low quiescent current contributes to minimal power consumption when the amplifier is in standby mode, making it a perfect fit for portable gadgets where battery longevity is critical.

Another notable characteristic of the TPA301 is its robust protection features, including over-temperature protection, short-circuit protection, and under-voltage lockout. These safety mechanisms ensure reliable operation under various conditions, protecting both the amplifier and connected speakers from damage.

In summary, Texas Instruments TPA301 stands out as an efficient, compact audio amplifier designed specifically for portable applications. Its combination of Class D efficiency, built-in DSP capabilities, wide audio format support, and comprehensive protection features make it an excellent choice for designers aiming for high-quality audio in a small footprint. Whether in smartphones or tablets, the TPA301 ensures consumers enjoy an unparalleled audio experience.
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