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充电头网2022-08-12 14:34广东深圳电酷网络科技有限公司,优质数码领域创作者
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前言
如今的笔记本电脑随着USB-C接口的普及，纷纷向着轻薄化发展，与之对应的就是传统的USB-A口以及视频输出接口都被砍掉，在需要外接扩展时相当不便。针对这一痛点，联想推出了一款USB-C接口的扩展器，支持三个USB-A口扩展和一个VGA接口输出，填补笔记本接口种类缺少的短板。
值得一提的是，这款扩展器的VGA输出，极大的方便了使用投影机的用户。通常投影机安装在棚顶，且使用周期很长，通过使用扩展VGA接口，能让老设备更好的顺应现代设备的发展，节省开支。下面充电头网就对这款扩展器进行拆解，看看内部使用了哪家的方案。
联想thinkplus四合一扩展器开箱
包装盒正面印有thinkplus品牌、产品外观以及名称——thinkplus USB-C 4-in-1便携扩展器。
背面印有产品名称、型号、商家信息。
包装内含扩展器以及保修卡。
thinkplus这款控制器采用PC材质塑料外壳，表面磨砂处理，整体修长扁平。
机身正面印有thinkplus品牌。
背面贴有产品铭牌，型号为4X90W86497，支持5V1.5A输出。
扩展器自带USB-C线，用户无需额外购买，此外侧身设有理线槽，方便收纳携带，同时还起到USB-A口的防尘密封作用。
理线槽内还有三个USB-A接口，每个接口均支持USB 3.1 Gen1（5Gbps）标准以及最大7.5W输出。
机身一端还有一个VGA接口，支持最大1920*1080@60Hz。
测得扩展器长度为105.01mm。
宽度为40.05mm。
厚度为15.17mm。
产品拿在手上的大小直观感受。
净重约为52g。
联想thinkplus四合一扩展器拆解
对联想thinkplus这款便携扩展器有了基本了解后，下面继续对其进行拆解，看看用料做工如何。
撬开卡扣固定的侧面盖板，即可轻松的拆开外壳，取出内部的PCBA模块。
内部PCBA模块一览，长条形契合外壳设计。
USB-C线缆为排线设计，更加纤薄，便于使用。排线连接处贴有导电布和胶带用于屏蔽。正面焊接三个USB-A口，集线器芯片，USB PD控制器，稳压芯片和VGA接口。
背面可以看到三个USB-A接口均为沉板焊接，降低厚度，背面还焊接一颗芯片用于DP信号转换成VGA输出。
FPC排线连接处粘贴导电布屏蔽，并粘贴高温胶带绝缘。
排线与排线座通过胶水固定，防止不慎跌落松动脱落。
控制芯片来自REALTEK瑞昱半导体，型号RTS5452，用于USB-C接口DP ALT控制，输出视频信号和USB3.0。
用于USB接口扩展的集线器芯片来自REALTEK瑞昱半导体，型号RTS5411S，是一款4口USB3.2Gen1集线器，用于三个USB-A口扩展。同时还支持充电功能，支持BC1.2以及苹果和三星等充电模式。
一颗存储器来自博雅，型号BY25D40AST1G，是一颗256KB的存储器，用于存储RTS5411S配置信息。
RTS5411外置的12.000MHZ无源晶振，用于提供时钟。
REALTEK瑞昱半导体RTD2166用于将DP信号转换成VGA输出，满足老式设备的视频输入需求。
1117芯片用于为RTD2166供电。
一颗存储器来自博雅，型号BY25D40AST1G，是一颗256KB的存储器，用于存储配置信息。
用于USB-A接口的限流芯片来自矽力杰，丝印CO，实际型号为SY6280，是一颗2A电流的负载开关，支持可编程的电流限制，支持过热保护，采用SOT23封装，适用于USB设备过流保护功能。
另外一颗SY6280特写。
用于USB-A口供电的滤波电容，为1210封装的MLCC。
另外一颗MLCC滤波电容特写。
USB-A口数据线连接TVS进行静电保护。
USB-A口沉板焊接固定。
外壳上钢印J10623。
VGA接口特写，沉板焊接降低厚度。
全部拆解完毕，来张全家福。
充电头网拆解总结
联想thinkplus扩展器自带USB-C接线，方便连接笔记本使用，扩展器支持三个USB-A和一个VGA接口输出，方便笔记本外接键鼠，连接老式投影机和显示器使用，为新老设备无缝衔接。扩展器采用超薄设计，厚度仅15mm，便于日常外出携带。
充电头网通过拆解了解到，联想这款扩展器内部采用了REALTEK瑞昱半导体的解决方案，RTS5452用于USB-C接口控制，内置RTS5411S用于USB-A接口扩展，RTD2166用于DP转VGA输出。USB-A接口均采用矽力杰SY6280进行过流保护，并焊接TVS阵列用于静电保护，确保稳定可靠使用。
RTS5411S
USB3.2 GEN1 4-PORT HUB WITH BILLBOARD AND HID EMBEDDED CONTROLLER
General Description
The RTS5411S is an advanced USB3.2 Gen1 4-port Hub controller that integrates USB3.2 Gen1 and USB2.0 Transceivers, MCU, SIE, regulator, and charger circuits into a single chip. The RTS5411S fully backward supports the USB2.0 and USB1.1 specification, and can be operated in SuperSpeed USB, Hi-Speed, Full-Speed, and Low-Speed.
The RTS5411S provides a battery charging function for each downstream port. As well as supporting the USB Battery Charging specification rev1.2, the RTS5411S also provides a charging function for various portable devices. Not only downstream ports can be used as chargers, the RTS5411S’ upstream port also supports two special functions regarding the BC1.2 specification. The first charger function of the RTS5411S’ upstream port is called 'ACA-Dock’ mode. When a device that supports the ACA-Dock feature of the BC1.2 specification is connected to an ACA-Dock, it acts as a host to various USB peripherals, such as a hub, keyboard, mouse, printer, etc., while simultaneously this device will be receiving a charge.
The second charger function of the RTS5411S’ upstream port is called the 'charger detection’ function. The RTS5411S supports an auto-detection and switch mechanism; it can recognize the type of BC1.2 device connected to the upstream port, including CDP, DCP, and SDP, and charge the connected device in the correct mode.
The RTS5411S can update its firmware with an external SPI flash via a flexible ISP channel. The ISP function allows configuration of multiple features and settings. The ISP function is easy to use with just one USB cable and the RTS5411S’ download tool.
The features and settings of the RTS5411S can also be configured via the SMBUS interface or internal eFUSE.
The RTS5411S has various interfaces to communicate with other components, such as GPIO, I2C, and SMBUS.
The RTS5411S supports a special power saving function (Delink mode). This can reduce power consumption when there is no device connected to the hub even though the upstream port of the RTS5411S is attached to the downstream port of the host or hub.
Features
Supports Universal Serial Bus 3.2 Specification Revision 1.0Four downstream ports for SuperSpeed USB, Hi-Speed, Full-Speed, and Low-Speed traffic
Backward support for USB specification Revision 2.0, 1.1, 1.0
MTT (Multiple Transaction Translator)
One TT (Transaction Translator) for each downstream port
Better data throughput when multiple downstream ports act on FS concurrently
Supports SMBUS to customize configurationsSMBUS address is configurable by external SPI Flash or internal eFUSE
Supports I2C to configure other chips on the same platform
Supports USB Battery Charging Specification Revision 1.2 and other portable devicesDCP Mode of BC1.2
CDP Mode of BC1.2
ACA-Dock functions of BC1.2
Charger detection function for an upstream port’s charger that supports BC1.2
D+/D- Divider Modes, 2.0V/2.7V, 2.7V/2.0V, and 2.7V/2.7V
D+/D- 1.2V Mode
The upstream port of the RTS5411S can detect whether the DSP it is connected to is a SDP, CDP, or DCP. When the RTS5411S is connected to a charging port, it is allowed to draw more current from the DSP
Supports Gang mode and Individual mode for downstream ports
Supports USB2.0 LPM-L1 function
Supports USB3.2 Gen1 U1/U2/U3 power saving mode
Integrated Fast 8051 microprocessor
Supports one HID device
Supports one Billboard device
Supports Pending HP timer, PM timers, and U1/U2/LFPS exit latency as defined in the USB3.2 specification
Supports 12MHz Crystal clock
Integrated 3.3V output LDO; the input range supports from 4.5V to 5.5V
Integrated 1.2V output switching regulator; the input range supports from 3.1V to 5.5V
Supports LED control functions; indicates Downstream Port transfer activity and over-current conditions
Supports eFUSE to configure functions or configurations such as non-removable port, gang mode, etc.
Supports the 'Delink’ function for extreme power savingIf there is no device attached to the RTS5411S’ downstream ports, the RTS5411S will disconnect itself from the downstream port of the host or hub controller for further power saving. The connection of the upstream port will be established automatically once there is a device attached to its downstream ports.
76-pin QFN (9 x 9 mm) package
Applications
Notebook, Desktop PCs
Docks, Dongles
Monitors
USB HUB
