TDA8920BJ/N2,112

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Audio amplifiers are components that are used to increase the magnitude of an electrical signal to drive loudspeakers. Audio amplifiers are used in a variety of sound system applications, ranging from small portable pocket radios to large public address systems. The TDA8920BJ/N2,112 is a high-performance class-B audio power amplifier, specifically designed for single-ended bridge-tied load (BTL) applications. In this article, we will discuss the application field of TDA8920BJ/N2,112, as well as its working principle.

Application Field

The TDA8920BJ/N2,112 is an audio power amplifier that is designed for single-ended bridge-tied load (BTL) applications. Specifically, the amplifier can be used for active Loudspeaker boxes, such as HIFI, car audio, home cinema, and portable multimedia players. The Class-B output stage of the amplifier ensures minimal distortion and noise, while providing ample power output to drive large loudspeakers. The TDA8920BJ/N2,112 is also designed for low-voltage operation, making it ideal for compact battery-powered audio systems.

Working Principle

The TDA8920BJ/N2,112 is a high-performance class-B audio power amplifier. The amplifier\'s unique topology utilizes an output stage capable of driving up to 40 W into 4-8 ohms. The Class-B output stage uses two complementary output transistors, which allows for a higher output current capability of up to 5 A. This also reduces distortion and eliminates any crossover issues at the output nodes.

The amplifier utilizes a feedback loop to control the output voltage, voltage swing, and total harmonic distortion (THD). This is achieved by employing two separate loops for the positive and negative halves of the signal. The positive loop controls the positive voltage swing and the negative loop controls the negative voltage swing. The amplifier also utilizes an internal low-pass filter to reduce the dynamic output impedance. This ensures a low output impedance and allows for minimal distortion under heavy loading.

The amplifier also employs an external gain control mechanism, which allows for the output voltage to be adjusted up to 24 dB. This allows for precise control of the level of distortion as well as the output voltage, allowing for a precise and distortion-free sound. The amplifier is also capable of driving lower impedance loads due to its low output impedance.

Conclusion

The TDA8920BJ/N2,112 is a high-performance class-B audio power amplifier, specifically designed for single-ended bridge-tied load (BTL) applications. The amplifier is capable of delivering up to 40 W of power into 4-8 ohms and has a precise gain control mechanism to adjust the output voltage. The amplifier also utilizes an internal low-pass filter and two feedback loops to control the output voltage and current, as well as reduce distortion and eliminate any crossover issues at the output nodes. This makes the TDA8920BJ/N2,112 ideal for active loudspeaker boxes, car audio, home cinema, and portable multimedia players.

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