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Linear - Amplifiers - Audio: TDA8563Q/N2/S10,11 Application Field and Working Principle

The TDA8563Q/N2/S10,11 are audio linear amplifiers that are intended for use in applications like TV systems, radios and PC motherboards. With low stand-by current and high output power, the TDA8563Q/N2/S10,11 audio amplifiers are designed with a MESFET input stage and a Class-AB output stage. These amplifiers can provide 19 dB gain before the onset of distortion and offer a maximum power rating of 20W.

The TDA8563Q/N2/S10,11 amplifiers use a MESFET (Metal Semiconductor Field Effect Transistor) for its input stage to amplify the input signal. The MESFET is essentially a voltage-controlled transistor whose conductivity increases with an increase in gate voltage. The gate of the MESFET is connected to the amplifier\'s input. When a signal is applied to the input of the amplifier, the MESFET\'s gate voltage changes and the voltage passed between the drain and source varies to amplify the signal.

The output stage of the TDA8563Q/N2/S10,11 amplifiers consists of two N-Channel MOSFET transistors. These transistors are used for amplification and for the output of the amplified signal. The amplified signal is then passed to the load which can be a loudspeaker or another device. The combination of the MESFET and the two N-Channel MOSFET transistors in the output stage leads to the high gain and power output of the TDA8563Q/N2/S10,11 audio amplifiers.

The TDA8563Q/N2/S10,11 amplifiers are also equipped with an automatic stand-by circuit that reduces the stand-by current when the amplifier is not in use. This prevents the device from overheating and maximizes its lifespan. Additionally, the amplifiers have low distortion figures and can be used in applications where high audio fidelity is required. It also comes with thermal protection that prevents it from operating beyond its maximum power ratings.

The TDA8563Q/N2/S10,11 audio amplifiers are ideal for applications where low stand-by current, high output power and low distortion figures are required. It is suitable for use in TV systems, radios and PC motherboards. Its thermal protection and automatic stand-by circuit provides higher reliability and longer lifespan.

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