AN17820B

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AN17820B, a linear amplifier, is a versatile audio power amplifier IC that has a wide range of applications and is reliable to use. It can be used in many applications such as speaker amplifiers, telecommunications modules, home theatre systems, and sound-reinforcement systems.

The AN17820B is a mono audio power amplifier that features a maximum power output of 120 W with a 48 V supply voltage. It features high efficiency and low distortion, enabling it to drive high speaker output power levels with minimal power wastage. Its frequency response range is from 20 Hz to 20 kHz, giving it good audio reproduction and range in signal frequency.

The AN17820B is designed as an electric bridge amplifier with a voltage amplifier stage and an output stage for dissipating power in the form of heat. It is designed around a patented modulation technique that minimises thermal-dissipation shut down. This enables maximum output power to be obtained with minimum power loss and low idle current. The device also features dynamic protection from over voltage, short circuit, and thermal shut down.

The AN17820B has two separate input signals, one for low frequency and one for high-frequency signals, enabling it to easily reproduce a wide range of frequencies. The signal is then filtered and amplified, with the gain controlled by the two potentiometers on the board. The output signal can be adjusted using the two potentiometers to give the desired sound volume and quality. Each potentiometer is provided with an over-current protection element to keep the circuit safe during operation.

The AN17820B amplifies sound signals in a linear fashion. It uses the classical linear amplifier circuit to boost low-level input signals and produce a high-level output signal that is undistorted and has low noise. The amplifier uses a variable gain circuit in which the gain can be adjusted based on the input signal level. This variable gain allows the device to produce enough gain to drive high-power speakers, while maintaining low distortion levels.

The AN17820B operates in compliance with the safety requirements defined in the IEC/EN 61000-3-2 standard. It is designed to have a low tendency for interference, therefore it requires minimal shielding for both the input and output stages. The amplifier also features low power consumption and is power efficient, making it an ideal choice for low-power applications.

The AN17820B is an ideal choice for power amplifying audio signals. Its wide range of applications, reliable operation, and low power consumption make it a reliable and cost-effective solution for audio amplification. With its linear amplifying design, it can produce high-quality audio signals with minimal distortion and noise.

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