BD3481FS-E2

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Base Part Number:	BD3481

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Audio Special Purpose: BD3481FS-E2 application field and working principle

The BD3481FS-E2 is an audio special purpose integrated circuit designed to meet high-quality audio playback requirements. As a specialized device, this IC is used in a wide range of applications, including digital audio players, car audio systems, digital television receivers, multimedia systems, and more. Here we will discuss the application field and working principle of BD3481FS-E2.

Application Field

This IC is designed to provide a high-quality audio output with minimal power consumption. The device can be used to drive a wide range of audio devices, including headphones and earphones. It is also suitable for producing high-quality sound from amplifiers and speakers.The BD3481FS-E2 features two integrated audio chips that work together to generate stereo full-range sound for a wide variety of audio applications. This audio device is capable of generating a maximum output power of 2 watts with a minimum load impedance of 8 ohms, making it suitable for use in amplifiers and other audio components.The device features four digital input ports, two of which are able to accept a variety of digital audio sources. Moreover, the IC supports the I2S and TDM formats, making it suitable for the latest generation of digital audio systems.

Working Principle

The BD3481FS-E2 works by converting digital audio sources into analog electric signals. The device converts the digital audio signals into left and right channel signals and amplifies them before they are eventually output as audio.The analog signals are converted by a converter circuit, which consists of two operational amplifiers and a differential amplifier. The operational amplifiers amplify the input signals while the differential amplifier is responsible for the summed audio output.The BD3481FS-E2 also features a PLL circuit to stabilize the device’s clock frequency. The PLL circuit is also responsible for generating a low-jitter clock signal for audio sources.The device also includes an auto-mute feature, which allows it to reduce distortion and background noise when no audio signal is detected. This is achieved by automatically switching the device off and on when no audio signal is detected for a predefined period of time.

Conclusion

The BD3481FS-E2 is a specialized audio integrated circuit designed to provide high-quality audio playback with minimal power consumption. This audio device features two integrated audio chips, a converter circuit, a PLL circuit and an auto-mute function, making it suitable for a variety of audio applications. This device is ideal for driving headphones, earphones, speakers, and other audio components.

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