应用领域：智能家电

方案类型：原型方案

主控芯片：USB2514

方案概述

无线音箱为打造家庭影院、解决布线难的问题而设计，MCHP无线音频传输距离200米，同步高宝真音质，触摸按键、USB便携设备充电灯功能。

核心优势

传输距离长

低功耗

低温度

具有支持充电功能 BC 1.2 ，1.1 无压缩

高保真音质

USB2514

Not Recommended for new designs

Microchip's USB251xB is a family of versatile, cost-effective, and power-efficient USB 2.0 hub controllers. Leveraging Microchip's innovative MultiTRAK™ technology that delivers industry-leading data throughput in mixed-speed USB environments, the USB251xB family is a USB port expansion solution for applications that demand ultra low power and a small footprint without compromising on performance.

Well-suited for consumer and mobile applications, all members of the USB251xB family are available in a space-saving package. The common 36-pin package shared among the 2/3/4 port hub controllers measures only 6x6 mm and provides an ultra small footprint for space-constrained designs while allowing scalable port expansion from two to four ports.

Over 30 programmable features including Microchip's unique PortMap, PortSwap, and PHYBoost are designed to aid system designers in simplifying PCB layout and optimizing bill-of-material cost. Every downstream port of the USB251xB hubs can be enabled to support USB Battery Charging 1.1 specification as a Charging Downstream Port (CDP). A CDP provides universal battery charging capability to a compliant mobile phone or portable electronic device using a standard USB port.

The USB251xB supports an extended operating temperature range of 0° to 85°C. The USB251xBi is designed to meet -40° to 85°C industrial temperature requirements.

*The USBCheck online design review service is subject to Microchip's Program Terms and Conditions and requires a myMicrochip account.

USB2514特性

Highlights

High performance, ultra low-power, small footprint hub controller IC with 2, 3, or 4 downstream ports (indicated by the “x” in the part number)

Fully compliant with the USB 2.0 specification

Enhanced OEM configuration options available through either a single serial I2C® EEPROM, or SMBus slave port

MultiTRAK™ - High-performance multiple transaction translator which provides one transaction translator per port

PortMap - Flexible port mapping and disable sequencing

PortSwap - Programmable USB differential-pair pin locations ease PCB design by aligning USB signal lines directly to connectors

PHYBoost - Programmable USB signal drive strength for recovering signal integrity using 4-level driving strength resolution

USB2514Features

USB251xB/xBi products are fully footprint compatible with USB251x/xi/xA/xAi products as direct drop-in replacements

Cost savings include using the same PCB components and application of USB-IF Compliance by Similarity

Full power management with individual or ganged power control of each downstream port

Fully integrated USB termination and pull-up/pulldown resistors

Supports a single external 3.3 V supply source; internal regulators provide 1.2 V internal core voltage

Onboard 24 MHz crystal driver, ceramic resonator, or external 24/48 MHz clock input

Customizable vendor ID, product ID, and device ID

4 kilovolts of HBM JESD22-A114F ESD protection (powered and unpowered)

Supports self- or bus-powered operation

Support the USB Battery Charging specification Rev. 1.1 for Charging Downstream Ports (CDP)

36-pin QFN (6x6 mm) RoHS compliant package

USB251xBi products support the industrial temperature range of -40°C to +85°C

USB251xB products support the extended commercial temperature range of 0°C to +85°C

Target Applications

Mobile PC Docking Stations

LCD Monitors/TVs

PC Motherboards

Gaming Consoles

Multi-Function Printers

Cable/DSL Modems

Set-Top Boxes

DVD/CD-ROM/DVR

HDD Enclosures

Keyboards

KVM Switches

Server Front Panels

Point-of-Sale (POS) Systems

IP Telephony

Automobile/Home Audio Systems

Industrial

参数名称：数值

Upstream Port：USB 2.0

USB Speed：High Speed

Downstream Ports：4

MGMT I/F：I2C

Op Voltage (V)：3.3

MultiTRAK Tech：Yes

PortMap：Yes

PortSwap：Yes

TrueSpeed：Yes

PHYBoost：Yes

Temp. Range Min.：-40

Temp. Range Max.：85

USB2514 Full Speed USB 2.0 4 Port Hub Customer Evaluation Board

Part Number: EVB-USB2514B-FS

The SMSC USB2514 is a Low-Power Full-Featured Full-Speed USB 2.0 compliant hub with four down-stream ports. The EVB-USB2514B-FS Evaluation Board demonstrates a standalone application for the hub. It is designed to robustly demonstrate the unique features of this device using a low-cost PCB implementation with individual port power control. The Evaluation Board is Full-Speed 12Mbits/s and Low-Speed 1.5Mbits/s compatible with self-powered operation available.

Features

The EVB-USB2514B-FS Evaluation Board demonstrates a standalone application for the hub.

便携音箱

便携音箱一般是指目前市场上支持或者能够读取SD、TF等等这些内存处理器的音箱。很多音箱品牌都有生产插卡音箱，插卡音箱除了有便携音箱之外，现在还有好多的多媒体2.1音箱也具备了读卡的功能。

便携音箱特点

1 ，可以直接播放你的SD/MMC卡、U盘,的MP3格式音频文件。不需要切换，记起自动读取。享受移动音乐与强大的多媒体音乐音箱 ，完美的手机的音乐播放器，支持MP3 ，的MP4 ，笔记本电脑，PC.

2 ，专为音乐手机和笔记本电脑的3.5mm标准接口连接器，如客户的要求，可以提供配套的接口连接器，，同时适用于MP3/4，PC，iPod。音箱自带3.5mm(适用Nokia N95等)多功能音频插头。可把3.5mm(Nokia N95)音频插头接入相应转接头转变为NokiaN73/N70专用音频插头、Nokia N6300专用音频插头，因此款音箱适用于所有的音乐播放器。

3，无需消耗手机电量，自身携带可充电锂电池，是一款专业的便携音乐设备。内置可充电锂电池可工作2至5个小时，充电时间由2至3小时。 　带FM收音，插上U盘或SD卡后，播放时可以显示第几首歌哦(不可以显示歌词)。

便携式设计是简化音箱连接和使用的有效途径，给人更加简洁的感觉，所以不管便携迷你音箱还是桌面迷你音箱，都有很多款式采用一体设计。

便携音箱发展趋势

便携音箱首先开始于2009年，从诞生至今也就4年时间。在这里，我们不去追述便携音箱的发展历史。而从技术结合的角度，来梳理便携音箱的发展脉络，并引出便携音箱未来发展的思考而后便携音箱取得了巨大的发展，如今便携音箱市场品牌林立，各种品牌之间竞争异常激烈，但是不同的品牌之间产品的同质化程度越来越严重，所以未来便携音箱的发展除了走品牌化的道路之外，更多必须寻求一种新的发展方向，比如内容服务模式、外观特异化等。追求一种新的发展方向成为每一个便携音箱品牌的必由之路。