TPA0112PWP

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TPA0112PWP Application Field and Working Principle

The TPA0112PWP Integrated Class D Amplifier from Texas Instruments is a low cost, low power audio power amplifier designed for portable and multimedia applications, for small to medium sized speakers.

The device is a high efficiency, low noise, stereo amplifier with a power handling capability of 1.2 Watts into a 4 Ohm load. The operations are ensured by its integrated logic circuitry, which provides automatic shutdown and protection, controlled by the external bias voltage. This also includes temperature, overload, and short circuit protection.

Applications

The TPA0112PWP is used in many different applications such as computer speakers, MP3 players, digital audio systems, portable charging devices, and automotive audio systems. The audio amplifier is suitable for portable devices such as digital cameras, mobile phones and PDA’s with their own power sources.

Working Principle

The TPA0112PWP from Texas Instruments is capable of delivering high efficiency, low distortion, and high unity gain stability. The device also comes equipped with a built in 20 Vpp voltage sense amplifier for controlling the output level, allowing for automatic programming of output levels and clip distortion detection. The device also has an integrated protection controller for the input and output stages.

The TPA0112PWP uses a linear current-feedback technique that was designed to reduce the power consumption of the stereo amplifier. This technique requires less power than the traditional voltage-feedback technique, resulting in a lower Heat-Sink, component and layout area. The operational amplifier also includes a power save mode which helps reduce the amplifier’s power consumption further. The power save mode provides an adjustable termination resistance at the output of the amplifier and allows the power efficiency to be maximized.

The amplifier also has an integrated transmit/receive amplifier which enables the amplifier to drive stereo headsets. The TPA0112PWP also includes an adjustable gain control. The gain of the amplifier is adjustable between 19 dB and 47 dB. This allows the user to tailor the amplifier’s performance to their specific application.

Conclusion

The TPA0112PWP from Texas Instruments is a high efficiency, low noise, low power, Class D audio power amplifier designed for portable and multimedia applications. The device is suitable for many different applications including computer speakers, MP3 players, digital audio systems, portable charging devices, and automotive audio systems. The device also has integrated logic circuitry which provides automatic shutdown and protection, controlled by the external bias voltage.

The amplifier also has an integrated transmit/receive amplifier which enables the amplifier to drive stereo headsets, as well as an adjustable gain control. The gain of the amplifier is adjustable between 19 dB and 47dB, allowing the user to tailor the amplifier’s performance to their specific application. The amplifier also includes a power save mode which reduces the power consumption by maximizing the efficiency.

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