Texas Instruments TPA102 MSOP manual Module Gain, Shutdown

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The TPA102 MSOP Audio Power Amplifier Evaluation Module

3.2.2Module Gain

The TPA102 MSOP evaluation module has a set gain of 4 (inverting) for each channel. However, the gain can be adjusted to a maximum of approximately 10 (inverting) by changing the value of feedback resistors (R2 and R4, Figure 3–3). Use the following equation to determine the value of RF:

Gain +– RF

RI

The TPA102 amplifier IC, like most other amplifiers, exhibits its best distortion and noise performance at lower gain levels. In addition, higher gain levels require a small compensation capacitor to ensure stability (see the TPA102 amplifier IC data sheet, TI literature number SLOS213).

Gain versus total harmonic distortion (THD) and gain versus signal-to-noise ratio (SNR) should be considered in each application. Both the module input signal level and the TPA102 MSOP module gain should be adjusted to obtain the lowest overall distortion level for a particular overall gain. A quick rule of thumb (everything else being equal): the module input signal level should be as high as possible without clipping or overloading the TPA102 input, and the TPA102 gain should be kept as low as possible.

3.2.3Shutdown

When the shutdown terminal of the TPA102 amplifier IC is taken high, the IC ceases operation and enters a very low power state (65 ∝ A, Typ). This is accomplished by applying a control signal to the module SD pin or by pressing the Shutdown switch, S1, on the module. When the control signal goes low or is removed (or the switch is released), amplifier operation resumes.

The plug-n-play platform can generate the mute signal for the module either when a plug is inserted into the platform headphone output jack or when the plug is removed, as selected by a platform jumper (JP7).

Details 3-5

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Contents User’s Guide Important Notice Related Documentation-From Texas Instruments PrefaceFCC Warning Contents Tables FiguresIntroduction Features Description TPA102 Msop EVM SpecificationsIntroduction EVM JP6 JP7 JP8 Quick StartPower Input Audio PrecautionsPlatform preparations Quick Start List for PlatformQuick Start List for Stand-Alone Details TI Plug-N-Play Audio Amplifier Evaluation Platform TPA102 Msop EVM TPA102 Msop Audio Power Amplifier Evaluation ModuleTPA102 Amplifier IC 1 TPA102 Audio Amplifier ICShutdown Module GainEVM Insertion Installing and Removing EVM BoardsSignal Conditioning Signal RoutingShutdown Polarity Control Power Requirements Inputs Inputs and Outputs1 TPA102 Msop EVM Connected as a Stereo Headphone Amplifier Using the TPA102 Msop EVM Stand-AloneTPA102 Msop EVM Parts List

TPA102 MSOP specifications

The Texas Instruments TPA102 is a highly efficient class-D audio amplifier designed specifically for portable applications, making it an ideal choice for devices like smartphones, tablets, and other battery-operated electronics. One of its standout features is its ability to deliver powerful output while maintaining a small footprint, thanks to its MSOP (Micro Small Outline Package) design. This compact packaging allows designers to implement the TPA102 in space-constrained environments without sacrificing performance.

A key characteristic of the TPA102 is its efficient power consumption. The amplifier is capable of delivering substantial output power with minimal distortion, which is critical for ensuring high-quality audio playback. It supports a wide range of supply voltages, typically from 2.5V to 5.5V, making it versatile for various applications. With a typical output power of 1W into an 8-ohm load, the TPA102 excels in delivering clean audio signal without considerable heat generation, which is particularly beneficial in battery-powered devices where thermal management can be a challenge.

The TPA102 incorporates several innovative technologies that contribute to its performance. One such technology is the elimination of output filter components, which simplifies the design and reduces the overall cost. Additionally, the device features integrated protection mechanisms that prevent overheating and short-circuiting, thereby enhancing reliability. This combination of efficiency and durability makes the TPA102 suitable for rugged and demanding audio applications.

Another impressive aspect of the TPA102 is its low total harmonic distortion (THD), which ensures that the audio signal remains clear and true to the original input. Coupled with an excellent signal-to-noise ratio, the TPA102 is designed to provide an immersive listening experience in various audio setups.

Moreover, the TPA102 supports multiple operating modes, including shutdown mode that significantly reduces power consumption when the device is not in use. This feature is especially beneficial in portable applications where battery life is a crucial consideration.

In summary, the Texas Instruments TPA102 MSOP audio amplifier stands out for its compact size, efficient power consumption, and high-quality audio output. With advanced features and robust protection mechanisms, it is a reliable choice for designers seeking to develop cutting-edge audio solutions in portable devices.
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