Texas Instruments TPA0202 manual Depop Circuitry, BTL Operation

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The TPA0202 Audio Power Amplifier Evaluation Module

Figure 3±4. TPA0202 Amplifier IC

MUX

 

MUX

 

MUX

SE/BTL

The IC includes two separate amplifier channels, each of which can operate in either the bridged-tied load (BTL) mode or the single-ended mode as selected by the SE/BTL pin. In the BTL mode, the two output lines of each channel operate 180° out-of-phase with each other for increased power. The speaker load is connected directly across OUT+ and OUT±, and neither line is connected to ground. BTL operation provides many benefits, including quadruple the output power of single-ended operation and no need for bulky output coupling capacitors. In the single-ended mode, the speaker load is connected between the OUT+ terminal, through an output coupling capacitor, to system ground. For more information, see the TPA0202 amplifier IC data sheet, TI Literature Number SLOS205.

3.2.2Depop Circuitry

The TPA0202 amplifier IC contains internal circuitry to minimize the various turn-on transients that might appear at the output during the transition from power off, shutdown, or mute to normal operation. Output turn-on transients can be virtually eliminated by sequencing the control inputs to the IC such that the TPA0202 amplifier is held in the single-ended output mode for a short time after the mute control pin is released (see paragraph 3.3.2.7).

3.2.3BTL Operation

To operate in the bridge-tied load output mode, the module SE/BTL control input terminal must be held low. The module output signal from OUT+ must go through the speaker load and be returned directly to OUT±, and NOT to system ground. This requires that the OUT± line be isolated not only from system ground, but also from the OUT± lines of any other amplifiers in the system. The platform provides such isolated output lines from the amplifier EVM sockets directly to separate left and right speaker connectors.

Details 3-5

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Contents Users Guide Important Notice Related Documentation From Texas Instruments PrefaceIf You Need Assistance Contents Tables FiguresIntroduction Feature Highlights ±1. The TI TPA0202 Audio Amplifier Evaluation Module DescriptionTPA0202 EVM Specifications EVM JP6 JP7 JP8 Quick StartAudio Input PrecautionsPlatform preparations Quick Start List for Platform±4. Typical TPA0202 EVM Jumper Settings ±3. Quick Start Module Map Quick Start List for Stand-AloneControl Inputs Details ±1. The TI Plug-N-Play Audio Amplifier Evaluation Platform ±2. TPA0202 EVM TPA0202 Audio Power Amplifier Evaluation Module1 TPA0202 Audio Amplifier IC ±3. TPA0202 EVM Schematic DiagramBTL Operation Depop CircuitryInputs and Gain SIngle-Ended OperationInstalling and Removing EVM Boards EVM InsertionEVM Removal ±5. TPA0202 EVM Jumpers and Switches 2 TPA0202 Module Jumper Settings and Switches2.4 S4 Ð Output Mode Jumper 2.2 S2 Ð Mute Switch2.1 S1 Ð Shutdown Jumper 2.3 S3 Ð Input Select Jumper2.8 S8 Ð Junction Temperature Measurement Jumper 2.7 S7 Ð SE Output Mode Switch2.5 S5 Ð VDD Bridge Jumper 2.6 S6 Ð Autosense JumperSignal Routing Signal ConditioningHeadphone Output Jack Mute/Mode Headphone Jack Control SignalsMute/Mode Polarity Select JP8 Mute/Mode Select JP6Power Requirements Inputs and Outputs InputsOutputs 1 TPA0202 EVM Connected for BTL Output Using The TPA0202 EVM Stand-Alone±10. TPA0202 EVM Connected for Stereo Single-Ended Output 2 TPA0202 EVM Connected for Single-Ended Output±1. TPA0202 EVM Parts List TPA0202 Audio Power Amplifier Evaluation Module Parts List

TPA0202 specifications

The Texas Instruments TPA0202 is a high-performance Class-D audio amplifier designed for a variety of portable audio applications. Renowned for its efficiency and sound quality, the TPA0202 is an ideal choice for battery-operated devices such as mobile phones, tablet computers, and other handheld devices. With the continuous push for better audio experiences in compact formats, the TPA0202 stands out with its impressive specifications and features.

One of the key characteristics of the TPA0202 is its power efficiency. Operating at a high efficiency rate of up to 90%, this Class-D amplifier minimizes heat generation, allowing it to deliver more power to the audio output while extending battery life. This efficiency is especially crucial for portable devices, where battery performance is a key consideration.

The TPA0202 supports an output power of 2 watts per channel into 4 ohms, making it capable of driving small speakers or headphones with excellent sound quality. The device features a built-in differential input stage that enhances noise immunity, thereby ensuring cleaner audio reproduction. It also supports a wide supply voltage range from 3V to 5.5V, contributing to its versatility in different applications.

In terms of audio quality, the TPA0202 boasts low total harmonic distortion (THD) and exceptional linearity, resulting in rich, clear audio output. Additionally, it comes equipped with selectable gain settings, allowing designers to tailor the amplifier to various output requirements and system designs.

The amplifier also integrates various protection features, including thermal shutdown, short-circuit protection, and undervoltage detection, ensuring robust operation under different conditions. The TPA0202 is also simple to implement in designs, with a minimal external component requirement, further enhancing its appeal to engineers seeking quick and efficient solutions for audio amplification needs.

Moreover, the compact package size of the TPA0202 allows for easy integration into space-constrained designs. With its combination of high efficiency, excellent audio quality, and protective features, the Texas Instruments TPA0202 continues to be a compelling choice for developers looking to enhance audio performance in portable and battery-operated devices. Whether for consumer electronics or in more specialized applications, the TPA0202 delivers reliable and impressive sound amplification, making it a go-to component for modern audio solutions.
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