BD5446EFV中文资料支持数字输入的D类扬声器放大器数据手册ROHM规格书

描述 Description

BD5446EFV是针对超薄电视等省空间、节能用途而开发的，支持20W+20W数字输入的立体声D类扬声器放大器。采用顶尖的BCD (Bipolar, CMOS and DMOS)工艺技术，将输出功率段的导通电阻和接线电阻所产生的内部损失减至极限，实现了87% (10W+10W 输出, 8Ω负载时)的高效率。并采用小型背面散热型功率封装，具备低功耗、低发热量，无需散热片即可实现总体最大40W输出。是同时满足音响类系统大幅小型化、薄型化以及强感染力、高音质播放两方面需求的产品。

特性 Features

・ BD5446EFV has two system of digital audio interface. (I2S/LJ format, SDATA: 16 / 20 / 24bit, LRCLK: 32kHz / 44.1kHz / 48kHz, BCLK: 64fs (fixed), SYS_CLK: 256fs (fixed))
・ Within the wide range of the power supply voltage, it is possible to operate in a single power supply. (10~26V)
・ It contributes to miniaturizing, making to the thin type, and the power saving of the system by high efficiency and low heat.
・ S/N of the system can be optimized by adjusting the gain setting among 8 steps. (20~34dB / 2dB step)
・ It has the output power limitation function that can be adjusted to an arbitrary output power.
・ The decrease in sound quality because of the change of the power supply voltage is prevented with the feedback circuitry of the output. In addition, a low noise and low distortion are achieved.
・ It provides with the best stereo DAC output for the headphone usage. As a result, the output of the selection of the digital input in two systems is possible.
8) Eliminates pop noise generated when the power supply goes on/off, or when the power supply is suddenly shut off. High quality muting performance is realized by using the soft-muting technology.
9) BD5446EFV is a highly reliable design to which it has various protection functions. (High temperature protection, Under voltage protection, Output short protection, Output DC voltage protection and Clock stop protection)

应用 Application

·Portable Data Terminal
·Meter for Medical Treatments Portable
·血压计
·Single Board Computer
·数据管理设备（远程保健用）
·超声波诊断设备
·Monitor for Medical
·家庭影院
·超声波诊断设备（便携式）
·LED 照明
·CPAP
·内置电脑
·TV