Texas Instruments SLOU082 manual Module Switches, 1 S1 Ð Shutdown Switch, 2 S2 Ð Mute Switch

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Plug-N-Play Platform Inputs and Outputs

3.6 Module Switches

The TPA032D03 mono class-D audio amplifier evaluation module is equipped with two pushbutton switches that allow the module shutdown and mute functions to be manually activated.

3.6.1S1 Ð Shutdown Switch

To have the module amplifier IC enter the shutdown mode, press the Shutdown switch (S2) on the module. S2 connects the amplifier IC SHUTDOWN pin to ground, forcing it into a low-power state. This function can be controlled by an external control input to the SD module pin.

The shutdown mode reduces the amplifier IC current consumption to less than 1 ∝A compared to approximately 2.5 mA in the mute mode. The EVM

shutdown current is based on VCC, VDD, R2, R5, and R6, and capacitor leakage currents, but will typically be 97 ∝A ±5% for VCC = 12 V and VDD = 5

V. The plug-n-play platform typically draws 60 mA of current.

3.6.2S2 Ð Mute Switch

Pushbutton switch S1 on the TPA032D03 class-D EVM allows manual muting of the amplifier IC. S1 connects the amplifier IC MUTE pin to ground, muting the output. The EVM Mute control input pin also allows external control of this function.

In the mute mode, the amplifier IC lowside output transistors are turned on, shorting the load to ground. This reduces the EVM current to 2.5 mA.

3.6.3J1 Ð Headphone Jack Mode Switch

EVM headphone jack J1 is equipped with an internal switch that grounds the amplifier MODE pin until a plug is inserted into the jack. When a plug is inserted into the headphone jack, the IC MODE pin goes high and the IC headphone amplifier goes active and the class-D amplifier shuts off.

3-6

Details

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Contents Users Guide Important Notice Preface Related Documentation From Texas InstrumentsPage Contents Figures TablesIntroduction Feature Highlights Description Typical TPA032D03 Class-D EVM SpecificationsMaximum 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 Outputs Plug-N-Play Platform Inputs and OutputsInputs Control and Indicator Circuits TPA032D03 Class-D EVM Test PointsModule Switches 1 S1 Ð Shutdown Switch2 S2 Ð Mute Switch 3 J1 Ð Headphone Jack Mode SwitchUsing The TPA032D03 Class-D EVM Stand-Alone Power ConnectionsOutput Connections Controls and IndicatorsInput 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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