STA508

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STA508 Application Field and Working Principle

STA508 is an audio power amplifier IC designed for professional audio use. It is a three stage monolithic amplifier, designed to operate in bridge-tied load (BTL) output configuration with two power stages connected in the bridge configuration. The STA508 is based on a two-transistor differential amplifier circuit, and is suitable for use in small speakers and other high-power applications.

The STA508 is designed to drive audio signals into a 4 ohm load and has an output of 20 watts (RMS per channel) at a bandwidth of 20 Hz - 20 kHz. The amplifier has an internal protection circuit which guards against over-voltage and over-current events, and will automatically shut down in case of faults. The STA508 also features a thermal protection circuit which monitors the temperature of the power stages, preventing them from running too hot. The STA508 is also protected against overload and short circuit conditions.

The STA508 is a Class-D amplifier, which means it has a higher efficiency than other types of amplifiers, such as Class-A or Class-AB. The efficiency is achieved by switching the transistors on and off at rapid speeds in order to convert the input signal into an amplified output (hence, Class-D). As a result, the amplifier runs cooler and requires less power consumption.

In order to achieve its high efficiency, the STA508 uses pulse-width modulation (PWM) to control the output voltage. This is done by taking the input signal and digitally encoding it, before converting it back into an analog signal that can be used to drive the speaker. The STA508 has a signal-to-noise ratio of 90 dB and a distortion rating of less than 0.1%. It can operate on a supply voltage of 15 VDC to 18 VDC.

The STA508 is used in many audio applications, from car audio systems to guitar amplifiers and professional PA systems. It is highly reliable, efficient and flexible, making it ideal for a range of applications. The STA508 is a popular choice for amplifying audio signals, and provides a cost-effective solution for audio power amplification.

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