Texas Instruments TPA2008D2 manual Power Requirements

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Power Requirements

2.4 Power Requirements

The TPA2008D2 audio power amplifier evaluation module can operate from any voltage between approximately 4.5 V and 5.5 V; however, the TPA2008D2 amplifier IC on the module is characterized for operation at 5 V. For best performance (highest output power with lowest distortion), the module should be operated at 5 V.

The TI plug-n-play audio amplifier evaluation platform with a voltage regulator EVM installed on it can provide a regulated VDD supply from a wide variety of unregulated VCC voltage inputs between 5.5 V and 12 V, including an onboard 9 -V battery. Alternatively, an external regulated power source can be used to supply VDD voltage to the platform and the TPA2008D2 evaluation module installed on it.

Although the TPA2008D2 amplifier IC draws approximately 1 A from the power supply during continuous full power output, peak current draw can be as high as 2 A. Any power supply connected to the platform should be capable of providing 2 A of current to avoid clipping of the output signal during peaks. Current consumption driving speakers at normal listening levels is typically 0.1 A or less.

The platform is equipped with overvoltage and reverse-polarity supply voltage input protection in the form of fused crowbar circuits.

-VDD voltage applied to platform screw terminals J6 MUST NOT exceed the absolute maximum rating for the TPA2008D2 amplifier IC installed on

the evaluation module (6 V) or damage to the IC may result. In no case

should VDD voltage of the incorrect polarity or in excess of 6.1 V be applied to screw terminals J6 of the platform, or the power protection circuit on the VDD line will trip.

-VCC voltage applied to the platform MUST NOT exceed the maximum voltage input specified for the voltage regulator module installed in socket

U6 (12 V for the SLVP097), or damage to the voltage regulator module

may result. In no case should VCC voltage applied to the platform exceed 15 V, or the overvoltage protection circuit on the VCC bus will trip.

Operation 2-7

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Contents User’s Guide Important Notice EVM Important Notice EVM Warnings and Restrictions Information About Cautions and Warnings PrefaceRelated Documentation From Texas Instruments Contents Tables FiguresIntroduction Feature Highlights Description To 5.5 TPA2008D2 EVM SpecificationsEVM JP4 JP5 JP6 JP7 JP8 OperationSupply Power PrecautionsPlatform preparations Quick Start List for PlatformEvaluation Module Preparations Quick Start List for Stand-AloneQuick Start for Stand-Alone Operation Power Requirements Operation Reference TPA2008D2 Filter-Free Class-D EVM Schematic Diagram TPA2008D2 EVM SchematicTPA2008D2 EVM PCB Layers TPA2008D2 EVM Top AssemblyTPA2008D2 EVM Parts List TPA2008D2 EVM Parts ListDC Volume Control DC Volume TableReference

TPA2008D2 specifications

The Texas Instruments TPA2008D2 is a highly efficient, integrated audio amplifier designed to meet the demands of a variety of audio applications. This device is particularly well-suited for portable electronic devices, such as smartphones, tablets, and portable speakers, where space and power efficiency are critical considerations.

One of the standout features of the TPA2008D2 is its Class-D architecture, which allows for greater efficiency compared to traditional Class-AB amplifiers. With a maximum output power of up to 3.2 W per channel when operating from a 5 V power supply, it delivers high-quality audio performance while minimizing heat generation. This efficiency is crucial for battery-operated devices, as it prolongs battery life while providing ample power for driving speakers.

The TPA2008D2 also boasts a low quiescent current, which further enhances its power efficiency. The device operates with a wide supply voltage range, from 2.5 V to 5.5 V, making it highly versatile for various applications. Its small size and low profile package make it easy to integrate into compact designs, allowing manufacturers to create sleek products without compromising on audio quality.

In addition to its impressive power efficiency, the TPA2008D2 features built-in protections, including over-temperature protection and short-circuit protection. These safety features provide reliability and longevity, ensuring that the device can withstand varying operating conditions without failure.

Another notable technology employed in the TPA2008D2 is its advanced feedback mechanism, which ensures optimal performance across various loads and helps maintain audio clarity and fidelity. The amplifier supports a variety of input types, providing flexibility for design engineers when integrating it into different systems.

The design of the TPA2008D2 includes differential inputs, which help to eliminate noise and improve the overall sound quality. The inclusion of a gain setting allows users to customize the amplifier to suit specific application requirements, making it an adaptable solution for designers.

In summary, the Texas Instruments TPA2008D2 is a feature-rich audio amplifier that combines power efficiency, compact size, and reliability, making it a perfect choice for portable audio applications. With its Class-D design, advanced protection features, and flexibility in input and gain options, it continues to be a favored solution among audio designers seeking high performance in a small package.
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