TDA8589J/N1,112

TDA8589J/N1,112 is a linear Class-D amplifier IC which is specifically designed for audio applications. It is a device from a family of integrated Class-D amplifiers developed to be used in a variety of audio systems, such as sound systems, sound-recording and playback systems, meetings and conferences, etc.

Class-D amplification is a type of amplifying technique which uses pulse-width modulation (PWM) as a form of power modulation to produce a higher output power efficiency than conventional linear audio amplification techniques. The main purpose of using Class-D is to achieve a greater power efficiency while reducing the size of the amplifier.

The TDA8589J/N1,112 is designed to provide an Audio Class-D amplifier solution in a 3-pin package. It is based on an integrated circuit composed of a power amplifier, a PWM controller and a junction regeneration circuit.

The amplifier has a wide input voltage range of 1.4V to 5V, with a maximum output power of 3.2W into 8 Ohms at 13V. It features a low quiescent current, low noise and distortion, good transient response, a wide operating temperature range and a high efficiency.

This Class-D audio amplifier IC is also designed to meet the requirements of various audio applications with regard to lower GSM noise, low noise and distortion, high linearity and high efficiency at higher frequencies. In addition, it has a built-in high-side output current limiter, a short-circuit protection circuit and a thermal protection circuit.

As for the working principle, the TDA8589J/N1,112 uses a traditional approach to Class-D audio amplification by combining a power amplifier with an analog self-biased PWM controller and an audio feedback loop. The power amplifier is based on a bipolar junction transistor (BJT) technology. The PWM controller is driven by an external control signal and is used to convert a linear audio signal into a high-efficiency PWM signal.

The output stage of the power amplifier is composed of a low-side FET, called a P-FET, and a high-side FET, called an N-FET. The low-side FET is enabled and disabled by the PWM signal while the high-side FET is connected to the feedback circuit and is enabled or disabled by the output voltage of the power amplifier. In this way, the output voltage of the TDA8589J/N1,112 will be proportional to the input audio signal.

The TDA8589J/N1,112 possesses all the essential features for an Audio Class-D amplifier solution and is suitable for a variety of audio-related applications. It is a highly reliable device that provides excellent performance in terms of power efficiency, low noise and distortion level, good linearity and high efficiency at higher frequencies. Additionally, it also offers a built-in high-side output current limiter, short-circuit protection and thermal protection circuits for maximum protection against overloads.