مدار مجتمع (آی سی) آی‌سی صوتی ویژه

Product Attributes

Introduction

BD37531FV is a sound processor with built-in 3-band equalizer for car audio. A stereo input selector is available that functions to switch single end input and ground isolation input, input-gain control, main volume, loudness and 5ch fader volume. Moreover, “Advanced switch circuit”, which is an original ROHM technology, can reduce various switching noise (ex. No-signal, low frequency like 20Hz & large signal inputs). Also, “Advanced switch” makes microcomputer control easier and constructs a high quality car audio system.

Features

• Reduced switching noise of input gain control, mute, main volume, fader volume, bass, middle, treble, loudness by using advanced switch circuit
• Built-in differential input selector that can make various combination of single-ended / differential input.
• Built-in ground isolation amplifier inputs, which is ideal for external stereo input.
• Built-in input gain controller reduces volume switching noise of a portable audio input. Decreased number of external components due to built-in 3-band equalizer filter and loudness filter. It is possible to freely control the Q, Gv, fo of the 3-band equalizer, and Gv of the loudness through the I2C BUS control. A gain adjustment quantity of ±20dB with a 1 dB step gain adjustment is possible for the bass, middle and treble. Equipped with terminals for the subwoofer outputs. Also, the audio signal outputs of the front, rear and subwoofer can be chosen using the I2C BUS control.
• Energy-saving design resulting in low current consumption is achieved utilizing the BiCMOS process. It has the advantage in quality over scaling down the power heat control of the internal regulators. Input pins and output pins are organized and separately laid out to keep the signal flow in one direction which consequently, simplify pattern layout of the set board and decrease the board dimensions.
• It is possible to control I2C BUS with 3.3V / 5V.

Applications

• It is optimal for car audio systems.
• It can also be used for audio equipment of mini Compo, micro Compo, TV, etc.