Texas Instruments TPA005D12 manual Input Connections, Output Connections, Controls and Indicators

Page 33

Using The TPA005D12 Class-D EVM Stand-Alone

3.5.2Input Connections

The class-D amplifier input signals can be connected in either of two ways: differential or single-ended. For differential operation, connect the two lines from the signal source to the positive and negative inputs of each channel (RIN+/RIN± and LIN+/LIN± module pins). For single-ended operation, the input signal lines should be connected to the RIN+ and LIN+ module pins and the signal source ground wires should be connected to the RIN± and LIN± module pins.

For best results, the ground of the signal source should be connected to the GND pins at the EVM inputs to provide a return path for the current. The input signal and ground wires should be twisted to reduce inductance and noise pickup if the lead lengths are long and the cable is not shielded.

3.5.3Output Connections

The right speaker should be connected between the Rout+ and the Rout± module pins, and the left speaker should be connected between the Lout+ and the Lout± module pins to comply with the isolated output requirements for BTL operation.

3.5.4Controls and Indicators

The mute and shutdown functions may be controlled externally via the module mute and SD pins. An active-low input mutes the selected amplifier or shuts down the device. A signal of 2 V or higher, or a float condition, allows normal operation.

Note that the mute and shutdown signals applied to the EVM control input pins must be able to supply enough current to overcome the pullup resistor on the module (100 kΩ).

The fault indicator circuit can be monitored by attaching a pullup resistor to the open-drain outputs of FAULT0 (TP2) and FAULT1 (TP3). The voltage should not exceed 5 V and the current must be limited to less than 1 mA. A fault table is shown in Section 3.2.5 and the device data sheet.

Details 3-19

Page 32 Page 34
Image 33
Page 32 Page 34
Contents Users Guide Important Notice Related Documentation From Texas Instruments PrefacePage Contents Tables FiguresIntroduction Feature Highlights Description TPA005D12 Class-D EVM Specifications MaximumTypical OFF Quick StartAudio Power PrecautionsPlatform Preparations Quick Start List for PlatformQuick Start List for Stand-Alone Details ±1. The TI Plug-N-Play Audio Amplifier Evaluation Platform TPA005D12 Class-D Audio Power Amplifier Evaluation Module TP9 GND VDD2 TP3 1 TPA005D12 Class-D Stereo Audio Amplifier ICOverview of Class-D Audio Amplifiers ±5. Class-D Functional DiagramBridge-Tied Load BTL Operation ±6. Class-D Input and Output WaveformsClass-D Differential Inputs Control and Indicator Circuits±2. TPA005D12 Class-D EVM Test Points 6 TPA005D12 Class-D EVM Test PointsClass-D Amplifier Design Considerations Installing and Removing EVM Boards EVM InsertionEVM Removal Module Switches 2.2 S2 Ð Mute Switch2.1 S1 Ð Shutdown Signal Routing Signal ConditioningHeadphone Output Jack Shutdown Headphone Jack Control SignalsMute/Mode Polarity Select JP8 Mute/Mode Select JP6JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 Power RequirementsInputs and Outputs InputsOutputs Monitor Controls and Indicators Input ConnectionsOutput Connections ±11. Class-D Amplifier Frequency Response at 4 Ω TPA005D12 Class-D EVM Performance Characteristics±12. Class-D Amplifier Distortion versus Output Power at 4 Ω ± % Crosstalk Frequency TPA005D12 Class-D EVM Interconnects ±5. TPA005D12 Class-D EVM Bill of Materials TPA005D12 Class-D EVM Bill of Materials±18. TPA005D12 Class-D EVM Schematic Diagram TPA005D12 Class-D EVM Schematic10 TPA005D12 Class-D EVM PCB Layers ±19. TPA005D12 Class-D EVM Top Assembly±21. TPA005D12 Class-D EVM Top Layer ±23. TPA005D12 Class-D EVM Third Layer Details

TPA005D12 specifications

The Texas Instruments TPA005D12 is a highly regarded digital audio power amplifier that is engineered for high-performance applications. It is part of TI's TPA series, which is known for its efficient power delivery and superior sound quality. The TPA005D12 is designed to drive passive speakers while ensuring minimal power loss and efficient heat management.

One of the standout features of the TPA005D12 is its ability to provide 5 watts of continuous output power per channel into an 8-ohm load with a low total harmonic distortion (THD) rating. This makes it suitable for use in a variety of audio applications, including computer speakers, soundbars, and portable audio systems. The amplifier operates from a single supply voltage, ranging typically from 4.5V to 14V, allowing for flexible integration into different power supply environments.

The TPA005D12 adopts Class-D amplification technology, which significantly enhances power efficiency compared to traditional linear amplifiers. Class-D amplifiers convert the input audio signal into a series of pulse-width modulated signals, resulting in increased power savings and reduced heat generation. This not only improves the overall energy efficiency but also contributes to a longer operational lifespan for devices utilizing this technology.

Additionally, the TPA005D12 features an integrated thermal and short-circuit protection mechanism, which helps safeguard the amplifier from potential damage due to excessive temperatures or electrical faults. This reliability factor is crucial for manufacturers looking to create robust consumer electronics.

Another important characteristic is its integrated low-noise power supply rejection ratio (PSRR), which helps maintain sound clarity and reduces the impact of power supply noise on audio quality. The TPA005D12 also supports differential input signals, which can improve common-mode noise rejection and further enhance audio performance.

The device is offered in a compact package suitable for space-constrained applications, enabling easy integration into various designs. With a combination of low cost, high efficiency, and excellent audio performance, the Texas Instruments TPA005D12 stands out as a top choice for developers and engineers seeking reliable audio amplification solutions. Whether in home entertainment systems or personal audio devices, the TPA005D12 is designed to deliver exceptional sound quality with a minimal footprint.
Top Page Image Contents