USB C型和电源传输



USB Type-C连接器USB Type-C连接器现在被许多设备使用。无论最终应用是什么,采用USB-C线缆都有很多原因。因为其接口双面可插,因此可以随意插入设备;正反面随便插。其充电功率可达100 W(从5V/0.5A到20v/5.0 A),还允许将传统的Type-A和Type-B端口的功能合并到一个端口,甚至可以动态地改变作用。


无论用于何种用例,除了满足USB I/F要求外,还必须具有特定于应用的特性,确保以正确的防护等级保障操作安全。因为Type-C连接器背后的每一种实现都是特定于应用的,ST提供一些参考设计以加快开发时间。详细阅读本文“接下来介绍USB-C,在视频中了解STUSB45及其参考设计”或者社区中的问题“从电源插头或DC端口迁移到USB type-C的方法和原因是什么?”。

USB PD Type C Product Selector

Questions / Answers around USB-C and Power Delivery

Why USB-C connectors become more popular?

With the recent introduction of USB-C connectors supporting up to 100W of power, universal charging becomes a reality for users, especially the younger generation, seeking more portability and connectivity as well as to take care of their environmental footprint.

Why adopting USB-C as charging plug?

For devices up to 100W (20V 5A), the USB Power Delivery standard now offers a charging connector alternative to any input power plug (USB micro-B or DC barrel for instance). Main advantages and benefits are:

  • Smarter design: Thanks to its thickness and robustness, the type-C connector makes the product shape smarter than with a legacy DC barrel.
  • Universality: Additionally, in most cases, it makes the device compliant with universal AC adapters.
  • Cost saving: For vendors, no need any longer to include in the box a dedicated AC adapter for every device.
  • More convenient: For users, no need to carry multiple AC adapters when traveling. A cable works for all.
  • Eco-friendly: For the planet, less electronic wastes.

For SOURCE applications (AC adapter, power hubs, etc.), please check our portfolio here.

For SINK applications (battery powered or not), please check our portfolio here.

How to migrate from micro-B port to USB-C?

ST provides developers with a comprehensive solution to help them migrate their applications from USB Type Micro-B to Type-C ports based on our standalone STUSB4500L USB Type-C port controller.

With integrated VBUS switch gate drivers (PMOS), this certified USB-C 1.4 Power Sinking Device can be supplied directly by VBUS. In this case, power is provided directly by the source, avoiding any leakage from local batteries when the USB-C port is not used.

To help developers get started with their design, our STUSB4500 evaluation board (EVAL-SCS002V1) can be used as a small footprint reference design for fast migration of any USB mini-B, micro-B or STD-B application to USB-C. Schematics and source code examples are also available.

How to migrate from custom power plug or DC barrel to USB-C?

To help with their implementation, developers can use our standalone STUSB4500 USB PD controller for power sinking devices. The STUSB4500 is tiny, safe, certified, and easily customizable. It can be powered only from VBUS, therefore not sinking any current locally, preserving the battery lifetime.

Our EVAL-SCS001V1 reference design ensures a fast and easy migration from DC barrel to Type-C ports. An STUSB4500 evaluation board (STEVAL-ISC005V1) is also available to help developers get started. Schematics and source code examples can also be downloaded.

usb power delivery controller