مدار مجتمع (آی سی) آی‌سی صوتی ویژه

Product Attributes

Introduction

BD37531FV is a sound processor with a built-in 3-band equalizer designed for automotive audio systems. It features a stereo input selector for switching between single-ended and ground-isolated inputs, input gain control, master volume control, loudness control, and 5-channel attenuator volume control. In addition, ROHM's proprietary "Advanced Switch Circuit" minimizes various switching noises — such as those occurring during no-signal, 20Hz low-frequency, and large-signal input conditions. The "Advanced Switch" also simplifies microcontroller integration, contributing to the development of high-quality automotive audio systems.

Features

• Switching noise reduction for input gain control, mute, master volume, attenuator volume, bass, mid, treble, and loudness via advanced switching circuitry.
• Built-in differential input selector supporting multiple single-ended/differential input combinations.
• Built-in ground-isolated amplifier input, ideal for external stereo input.
• Built-in input gain controller minimizing volume switching noise for portable audio inputs.
• Reduced external component count with built-in 3-band equalizer filter and loudness filter. Q factor, gain Gv, center frequency fo for the 3-band equalizer, and loudness gain Gv are freely adjustable via I²C bus control.
• Bass, mid, and treble gain adjustable ±20dB in 1dB steps.
• Subwoofer output terminal included. Front, rear, and subwoofer audio signal output selectable via I²C bus control.
• Power-efficient BiCMOS process design with reduced current consumption. Quality advantage in thermal control of internal voltage regulator.
• Separate input and output pin layout enables unidirectional signal flow, simplifying PCB routing and reducing board size.
• I²C bus compatible with 3.3V/5V control.

Applications

• Automotive audio systems
• Mini component stereo systems
• Micro component stereo systems
• Televisions