TPA4861DG4

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The TPA4861DG4 is a highly efficient and low power audio linear amplifier that is part of the TPA48xxDG4 family from Texas Instruments. This amplifier is optimized for use in high power applications. It is a low-voltage single-ended input, two-stage linear amplifier with a low noise figure, allowing the audio to be reproduced accurately and faithfully. It yields a typical small-signal bandwidth of 10 MHz and a large-signal bandwidth of 5 MHz, providing a wide dynamic range for any power audio application.

The TPA4861DG4 operates in Class AB mode and is designed to be used in a variety of linear amplifier applications. It features a low noise figure, low distortion, and excellent linearity. The TPA4861DG4 is rated for output power of 250 mW (14 dB) at 3.0V supply voltage, and it is designed so that it can be used in multiple stages. It also features adjustable gain, adjustable input and output impedance, and a wide power supply range. This makes it ideal for a variety of audio applications, such as subwoofer amplifiers, PA systems, and car audio systems.

The TPA4861DG4\'s two-stage linear amplifier architecture includes an input stage and a push-pull output stage. The input stage is a differential and Class AB amplifier with a low-voltage gain of 17 dB, allowing for high input and output impedance. The push-pull output stage consists of NPN and PNP transistors, which in combination with the input stage, provides high-power Class AB audio amplification with low distortion. The push-pull output stage is also responsible for providing the power gain of 14 dB and a typical power supply efficiency of 80%.

The TPA4861DG4 is designed to accurately reproduce any audio signal with minimal distortion and noise. It is ideal for use in high-power amplifier applications, such as subwoofer amplifiers and PA systems. Its wide power supply range (1.8V to 5V) allows for flexibility in design, and its adjustable gain and low noise figure make it a great choice for any linear amplifier application.

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