Texas Instruments SLOU082 manual Input Connections, Output Connections, Controls and Indicators

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Using The TPA032D03 Class-D EVM Stand-Alone

3.7.2Input Connections

The class-D amplifier input signals can be connected in either of two ways: differential or single-ended. For differential operation, connect the signal source to the positive and negative inputs (IN+ and IN± module pins). For single-ended operation, the input signal line should be connected to the IN+ module pin and the signal source ground wire should be connected to the IN± module pin.

The EVM headphone amplifier inputs are single-ended, and the signal source should be connected to the RHP and LHP module pins. For best results, the ground of the signal source should be connected to the module GND pins at the EVM headphone 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.

3.7.3Output Connections

The speaker should be connected between the OUT+ and the OUT± module pins. Inserting a plug into the EVM headphone jack switches the EVM to the headphone mode and shuts down the class-D amplifier section.

3.7.4Controls and Indicators

The mute, mode, and shutdown functions may be controlled externally via the module Mute, Mode, and SD pins. An active-low input to the module Mute pin mutes the selected amplifier. An active-low input to the module Mode pin switches the EVM to the class-D mode and shuts off the headphone amplifier. An active-low input to the module SD pin shuts down the device. A signal of 2 V or higher, allows normal operation.

Note that the mute, mode, 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 at FAULT0 (TP1) and FAULT1 (TP2). These are open-drain outputs with 100-kΩresistors connected to VDD (5 V). A fault table is shown in Section 3.2.1 and in the device data sheet.

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Details

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Contents Users Guide Important Notice Preface Related Documentation From Texas InstrumentsPage Contents Figures TablesIntroduction Feature Highlights Description Maximum TPA032D03 Class-D EVM SpecificationsTypical Quick Start JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8Precautions Audio PowerQuick Start List for Platform Platform PreparationsQuick Start List for Stand-Alone Details ±1. The TI Plug-N-Play Audio Amplifier Evaluation Platform Plug-N-Play Platform Power Requirements and Connections Inputs Plug-N-Play Platform Inputs and OutputsOutputs Control and Indicator Circuits TPA032D03 Class-D EVM Test Points2 S2 Ð Mute Switch Module Switches1 S1 Ð Shutdown Switch 3 J1 Ð Headphone Jack Mode SwitchUsing The TPA032D03 Class-D EVM Stand-Alone Power ConnectionsInput Connections Controls and IndicatorsOutput Connections TPA032D03 Class-D EVM Bill of Materials ±4. TPA032D03 Class-D EVM Bill of MaterialsTPA032D03 Class-D EVM Schematic TPA032D03 class-D EVM schematic is shown in ±4±5. TPA032D03 Class-D EVM Top Assembly 10 TPA032D03 Class-D EVM PCB Layers±7. TPA032D03 Class-D EVM Top Layer ±9. TPA032D03 Class-D EVM Third Layer Details

SLOU082 specifications

Texas Instruments SLOU082 is a technical document primarily focused on the TPS7A47 device, which is an enhanced, low-noise linear voltage regulator designed for world-class performance in sensitive analog applications. This document explains the features, technologies, and characteristics that set the TPS7A47 apart in the industry.

One of the main features of the TPS7A47 is its ultra-low output noise, boasting a remarkable specification of just 1.2 μVRMS across a bandwidth of 10 Hz to 100 kHz. This characteristic makes it an ideal choice for high-precision, low-noise applications such as RF and audio signal processing, where minimizing noise is crucial for system performance. Additionally, the device offers a wide output voltage range from 1.4 V to 20 V, providing flexibility in various applications.

The TPS7A47 operates with a maximum output current of 1 A, enabling it to support multiple loads efficiently. Its dropout voltage is impressively low, particularly at light load conditions, ensuring high-efficiency performance in battery-powered applications. This aspect significantly extends battery life, making it suitable for portable devices.

Another highlight is the PowerPAD package offered for the TPS7A47, which enhances thermal performance and simplifies PCB design. The integration of thermal protection ensures the regulator operates safely under various conditions, preventing potential damage due to overheating.

The TPS7A47 also includes features such as reverse current protection, which prevents current from flowing back into the input when the output voltage exceeds the input voltage. This feature enhances reliability and extends the longevity of the device in various circuit configurations.

In terms of control, the TPS7A47 utilizes a low-dropout architecture, ensuring steady voltage regulation with minimal input-to-output voltage differential. It also supports a wide range of capacitor types, which allows for flexibility in component selection in layout design.

Overall, the Texas Instruments SLOU082 document on the TPS7A47 provides detailed insights into one of the most effective voltage regulation solutions available today. With exceptional noise performance, a versatile voltage range, robust thermal management, and reliability characteristics, the TPS7A47 is an exemplary choice for engineers and designers aiming to achieve high-performance analog systems.
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