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USB-C端口–取代您的下一辆汽车中的所有充电端口

由  Oscar Freitas 发布  - 09-18-2020 

2019冠状病毒(COVID-19)搁置或取消了我们的许多旅行计划。一方面,有人想知道航空旅行是否会完全关闭。对于其他人来说,公路旅行成为他们的首选旅行方式,因为与航空旅行相比,公路旅行接触COVID-19更有限。过去,汽车无法提供充电功能,因此需要将所有设备充满电后再出行。现在,在某些汽车中,您可以有用于电话的低功率USB Standard-A端口或从可用的12V适配器电源插座通过长蛇形USB中功率适配器电缆连接到您的设备。但这仍然只能满足您的手机和平板电脑的少量需求。如果您的笔记本电脑也需要充电怎么办?

USB-CTM(也称为USB Type C可解决这问题,提供为笔记本电脑以及耗电的5G手机、可能在整个行程中运行GPS的平板电脑充电的能力。如果您的娱乐设备有Apple Carplay,则为手机充电的同一前置USB-C端口也可以承载Carplay数据或Android Auto。或者,如果您更喜欢蓝牙数据和USB-C充电,那一切都在您的控制之内。坐在后座上,需要给设备充电吗?单个USB-C充电端口散布在整个汽车上,电源直接从车辆电池转换为USB-C供电(PD)电源,范围从5V到21V,以微小的20 mV增加。每个USB-C端口可用的功率可以扩展到100W,足以在一个小时左右的时间内为笔记本电脑充满电。当前的具有快速充电功能的智能手机可以在15分钟内实现100%充电,具体取决于USB-C方案中使用的设计和产品。

但是对于系统设计人员而言,您从哪里开始设计汽车USB充电器模块?当然,您可以先阅读1030页的USB Type-C和USB PD规范,但这令人生畏且非常耗时,此外,您可能需要深入研究任何引用的规范才能理解其中的内容。加入USB标准组织太耗时。此外,这些规范也在不断发展和更新。尽管您可能对消化所有规格信息感到压力山大,但安森美半导体可以提供帮助,因为这是我们所擅长的。

安森美半导体提供所有电子和参考设计来帮助设计高功率USB-C PD端口,从而提供了一种简单的方案。从12V电池开始,降压-升压DC – DC稳压器提供5V,可在连接后启动USB-C通信,USB PD控制器管理USB-C端口以处理连接电话、平板电脑和笔记本电脑所需的所有握手,获取各自的电压和电流,以实现最佳的电池充电。安森美半导体还提供所有MOSFET、用于反向电池保护的保护器件、过压、过流和过热保护、电池短路保护,并将它们组合为参考设计。

FUSB3307评估板是这种60 W参考设计的一个很好的例子,如下所示。FUSB3307是USB PD 3.0源控制器,提供了可编程电源(PPS)支持上述快速充电算法。通过一个5mΩ的微小电阻检测输出充电电流,并直接控制NCV81599 Buck-Boost控制器的反馈。

图1. FUSB3307评估板

它是完全独立的方案,兼容USB PD和USB-C。所有保护都设计导入以易于设计。可以将4.5 V至32 V的输入电压转换为3.3 V至21 V的USB PD电压。如果需要5A的电流能力,则无需额外的电子器件,因为现有系统会询问电缆以确保5A能力,然后提供5A Source能力。

安森美半导体不仅是汽车电子的一个主要供应商,而且还是USB PD规范充电一章的作者。我们会密切关注规范,并定制方案以满足您的设计需求。利用安森美半导体的所有器件,我们确保一切都能无缝地协同工作,并为您提供系统支持。

请查看FUSB3307评估板,以了解更多信息以及如何轻松、快速地将其应用到设计中。请继续了解我们的USB-C方案,以及它们如何满足您在汽车和其他各种应用中的下一个设计和方案需求。

更多USB-C资源:

请务必订阅我们的博客,并在社交媒体上关注我们,以获得有关我们的技术、方案和公司新闻的最新信息!

**本文提及的实际公司和其他产品的名称以及标记可能是其各自所有者的商标。**

标签:Automotive, Networking and Telecommunications, Portable and Wireless
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