AN17822A

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An17822A is an audio linear amplifier designed for applications requiring low power dissipation and high operating voltages. It is a direct replacement for the earlier Bizzy Bee and has been modified to provide a higher signal-to-noise ratio and improved power dissipation. The AN17822A is a class B linear amplifier that offers good dynamic range and low distortion. It provides a wide voltage range, allowing it to be used in both line-level and low-level applications.

The internal architecture of the AN17822A is based on a differential amplifier topology that is optimized to provide low-noise performance. The amplifier uses a pair of PNP Darlington transistors to provide the current gain. The PNP transistors are biased at a slightly reduced turn-on voltage compared to the Bizzy Bee in order to improve the overall efficiency. The load current is controlled by a precision voltage shunt, which is adjustable via a trim potentiometer. The adjustable trim potentiometer allows for the dynamic range to be adjusted for different applications.

The AN17822A amplifier offers a wide voltage range from ±18V to ±60V and is protected against overvoltage, undervoltage, thermal runaway, and short circuit conditions. In order to minimize power dissipation, the AN17822A operates as a class B amplifier where the quiescent voltage is set using the trim potentiometer. The amplifier is designed to maintain a low output offset voltage, even under extreme load conditions. As a result, the AN17822A can be used in both line- and low-level applications.

The AN17822A is a great choice for low-power, high-voltage applications. Its variable gain structure provides excellent audio fidelity and its trim potentiometer allows users to fine-tune the gain for different applications. The amplifier is also well-suited for high-signal-to-noise and low distortion applications. Furthermore, the AN17822A is protected against short circuits, overvoltages, and thermal runaway.

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