原标题：ST STUSB4500 USB供电(PD)控制器解决方案

　　ST公司的STUSB4500是单独可用的USB Type-C™供电(PD)控制器,能实现专用算法,允许不用MCU支持进行供电和电源的协调(自动运行模式),可以在两个USB Type-C端口间进行检测,容易在源和沉建立有效连接,能确定所接触器件是源还是调试附件,能解决电缆取向和双绞线连接到USB数据路由选择(MUX控制).主要用在机顶盒,硬盘驱动,摄像机和照相机,物联网(IoT),无人机,电池供电的设备,LED照明,以及健康和手持设备.本文介绍了STUSB4500主要特性,功能框图,应用电路图以及评估板STEVAL- ISC005V1主要特性,功能框图,电路图,材料清单和PCB设计图.

　　The STUSB4500 is a USB power delivery controller that addresses sink devices. It implements a proprietary algorithm to allow the negotiation of a power delivery contract with a source without MCU support (auto-run mode). PDO profiles are configured in an integrated non-volatile memory.

　　The device supports dead battery mode and is suited for sink devices powered from dead battery state and requiring high power charging profile to be fully operational.

　　Thanks to its 20 V technology, it implements high voltage features to protect the CC pins against short-circuits to VBUS up to 22 V and to support high voltage on the VBUS pins directly connected to the VBUS power path up to 28 V.

　　The STUSB4500 is a USB Type-C™ and power delivery controller IC for sink applications. It is able to negotiate apower delivery contract with a source without MCU support (auto-run mode). It relies on proprietary algorithmsand configurable PDO (power data objects) thanks to an integrated non-volatile memory. It supports dead batterymode to allow a system to be powered from an external source directly. Combined with its capability to negotiatedirectly a power contract, the STUSB4500 is the ideal controller device for autonomous systems requiring highpower charging profile to be fully operational.

　　The STUSB4500 major role is to:

　　1. Detect the connection between two USB Type-C ports (attach detection)

　　2. Establish a valid source-to-sink connection

　　3. Determine the attached device mode: source or debug accessory

　　4. Resolve cable orientation and twist connections to establish USB data routing (MUX control)

　　5. Negotiate a USB power delivery (PD) contract with a PD capable source device

　　6. Configure the incoming VBUS power path and the charging paths accordingly

　　7. Monitor the VBUS power path and manage the VBUS voltage transitions

　　8. Handle the high voltage protections

　　The STUSB4500 also provides:

　　• Dead battery mode

　　• PDO (power data object) customization through NVM

　　• Internal and/or external VBUS discharge paths

　　• Dual high power charging path support

　　• Debug accessory mode detection

　　• Customization of the device configuration through NVM to support specific applications

　　STUSB4500主要特性:

　　Auto-run Type-C™ and USB PD sink controller

　　Dead battery mode support

　　Up to 3 sink PDO configurable profiles

　　Dual high power charging path support

　　Integrated VBUS switch gate drivers (PMOS)

　　Integrated VBUS voltage monitoring

　　Internal and/or external VBUS discharge paths

　　Short-to-VBUS protections on CC pins (22 V)

　　High voltage capability on VBUS pins (28 V)

　　Dual power supply (VSYS and/or VDD ):

　　VSYS = [3.0 V; 5.5 V]

　　VDD = [4.1 V; 22 V]

　　Debug accessory mode support

　　Temperature range: -40 ℃ up to 105℃

　　ESD: 3 kV HBM - 1.5 kV CDM

　　Certified:

　　USB Type-C™ rev 1.2

　　USB PD rev 2.0 (TID #1000133)

　　Interoperable with USB PD rev 3.0

　　STUSB4500应用:

　　• Set-top-box, hard disk drives, camcorders, cameras

　　• IoT, drones, accessories and battery powered devices

　　• LED lighting and industrial

　　• Healthcare and handheld devices

　　• Any Type-C sink device

　　图1.STUSB4500功能框图

　　评估板STEVAL-ISC005V1

　　The STEVAL-ISC005V1 evaluation board is a ready-to-use USB PD sink based on STUSB4500. It handles the USB PD negotiation with a source to enable one or more charging paths.

　　An L7985 device ensures step-down conversion from the negotiated VBUS sink input to output a 5 V regulated supply which optionally allows powering an MCU evaluation board or any other system.

　　Several LEDs report power availability on each of the 4 available outputs.

　　The USB PD sink port is pre-configured with three different PDOs to address a broad range of applications (5 V, 15 V and 20 V).

　　PDOs can be easily customized thanks to a graphical user interface (GUI).

　　评估板STEVAL-ISC005V1主要特性:

　　USB PD port (sink)

　　STUSB4500 USB Power Delivery controller, certified for:

　　USB type-C™ (rev1.2)

　　USB PD (rev2.0)

　　TID: 1000133

　　Compliant with USB PD (rev3.0)

　　5 V on-board DC-DC

　　VBUS power switches and discharge path

　　Support to up to 3 power data objects (PDO)

　　Short-to-VBUS protections on CC pins (22 V) and VBUS pins (28 V)

　　Customizable start-up profiles

　　Multiple output paths

　　Compatible with NUCLEO-F072RB development board for configuration and debug interface

　　CE certified

　　RoHS and China RoHS compliant

　　图3.评估板STEVAL-ISC005V1外形图

　　图4.评估板STEVAL-ISC005V1功能框图

　　图5.评估板STEVAL-ISC005V1和NUCLEO-F072RB开发板连接图

　　图6.评估板STEVAL-ISC005V1电路图(1):STUSB4500

　　图7.评估板STEVAL-ISC005V1电路图(2):LED

　　图8.评估板STEVAL-ISC005V1电路图(3):+5V产生

　　图9.评估板STEVAL-ISC005V1电路图(4):用来I2C接入的USB-Nucleo接口

　　评估板STEVAL-ISC005V1材料清单:

　　图10.评估板STEVAL-ISC005V1 PCB设计图(1):尺寸