AN7522N

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Audio amplifiers are necessary components in all kinds of sound systems, whether for home or professional use. The AN7522N is an audio power amplifier IC designed for use in audio applications. It is a high output current, high voltage and low noise amplifier suitable for various sound systems. This article will discuss the application fields and working principle of the AN7522N.

The AN7522N is available in a 14-pin plastic-encapsulated package (DIL) and requires external transistors for operation. This IC has a wide range of applications, such as power amplifiers for hi-fi, car and professional audio systems, control amplifiers for amplifiers, remote controls, audio subsystems and other applications. The AN7522N offers high performance and efficiency, due to its high operating voltage range (8V to 35V) and its low quiescent power consumption. There is also an onboard speaker protection circuit, which is great news for users who want to protect their speakers from potential damage caused by loud noises.

The AN7522N uses a class B NPN bipolar transistor output stage with bridge configuration. This configuration allows the IC to provide both high voltage (up to ±40V) and high current of up to 5A. The operating points for the output stage are controlled by the two analog inputs, and the cutoff frequency is adjustable. The IC also has a protection circuit for thermal monitoring, short-circuit protection, and over-voltage protection. This makes the AN7522N an ideal choice for the user who needs reliable and robust performance.

The AN7522N works on the principle of biasing and voltage feedback. The bias voltage is set by two resistors located on either side of the IC. As the voltage feedback loop is moved, the bias voltage is also adjusted, thereby allowing for precise adjustment of the output stage. This allows the IC to precisely control the current and voltage output of the IC, which ensures reliable operation.

The AN7522N is a highly reliable and efficient audio power amplifier IC, which offers a wide range of applications. Its high voltage and current capability, along with its low noise and onboard protection circuitry, make it an ideal choice for audio systems. Its adjustable bias point and voltage feedback loop allow for precise voltage and current adjustments, thereby ensuring reliable operation.

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