ST USB Power Delivery User Manual
USB Power Delivery and Type-C
Overview |
Architecture |
Product Portfolio |
Solution |
USB Type-C Overview
USB Power Delivery specification introduces USB Type-C receptacle, plug and cable; they provide a smaller, thinner and more robust alternative to existing USB interconnect. Main features are:
•Enable new and exciting host and device form-factors where size, industrial design and style are important parameters
•Work seamlessly with existing USB host and device silicon solutions
•Enhance ease of use for connecting USB devices with a focus on minimizing user confusion for plug and cable orientation
USB Type-C Overview
Type-C Features
•Enable new and exciting host and device form-factors where size, industrial design and style are important parameters
•Work seamlessly with existing USB host and device silicon solutions
•Enhance ease of use for connecting USB devices with a focus on minimizing user confusion for plug and cable orientation
•Simple Power Delivery implementation (BMC)
Mode of Operation |
Nominal |
Maximum |
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Voltage |
Current |
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USB 2.0 |
5 V |
500 mA |
Default current, based on definitions in the base |
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USB 3.1 |
5 V |
900 mA |
specifications |
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USB BC 1.2 |
5 V |
Up to 1.5 A |
Legacy charging |
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USB Type-C @ 1.5 A |
5 V |
1.5 A |
Supports high power devices |
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USB Type-C @ 3.0 A |
5 V |
3 A |
Supports higher power devices |
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USB PD |
Configurable |
Configurable |
Directional control and power level management |
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up to 20 V |
up to 5 A |
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The Re-Evolution of USB
USB has evolved from a data interface capable of supplying limited power to a primary provider of power with a data interface
Power
Delivery
Type-C
Alternate
Mode
USB IF
More Power with USB Power Delivery (100W)
More Flexibility with a new reversible USB-C connector
More Protocols
(Display Port, HDMI, VGA, Ethernet…)
More Speed with USB 3.1 (10 Gbit/s)
USB PD Power Profiles
as of today …. per USB PD release 2.0
USB PD New Profiles proposal
Type-C Pin Outs Functions
Receptacle
High Speed Data Path |
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USB 2.0 |
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High Speed Data Path |
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(RX for USB 3.1, or reconfigured |
(TX for USB 3.1, or reconfigured |
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Interface |
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in Alternate Mode) |
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in Alternate Mode) |
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A1 |
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A2 |
A3 |
A4 |
A5 |
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A7 |
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A12 |
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GND |
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TX1+ |
TX1- |
VBUS |
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CC1 |
D+ |
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D- |
SBU1 |
VBUS |
RX2- |
RX2+ |
GND |
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GND |
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RX1+ |
RX1- |
VBUS |
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SBU2 |
D- |
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D+ |
CC2 |
VBUS |
TX2- |
TX2+ |
GND |
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B12 |
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B11 |
B10 |
B9 |
B8 |
B7 |
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B6 |
B5 |
B4 |
B3 |
B2 |
B1 |
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Secondary |
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Cable Bus |
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Cable |
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Configuration Channel |
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Bus |
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Power |
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Ground |
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Two pins on the USB Type-C receptacle, CC1 and CC2, are used in the discovery, configuration and management of connections across USB type-C cable
Type-C Pin Outs Functions
Plug
High Speed Data Path |
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USB 2.0 |
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High Speed Data Path |
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(RX for USB 3.1, or reconfigured |
(TX for USB 3.1, or reconfigured |
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Interface |
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in Alternate Mode) |
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in Alternate Mode) |
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A12 |
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A11 |
A10 |
A9 |
A8 |
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A6 |
A5 |
A4 |
A3 |
A2 |
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GND |
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RX2+ |
RX2- |
VBUS |
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SBU1 |
D- |
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D+ |
CC |
VBUS |
TX1- |
TX1+ |
GND |
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GND |
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TX2+ |
TX2- |
VBUS |
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VCONN |
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SBU2 |
VBUS |
RX1- |
RX1+ |
GND |
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B1 |
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B2 |
B3 |
B4 |
B5 |
B6 |
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B7 |
B8 |
B9 |
B10 |
B11 |
B12 |
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Secondary |
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Cable Bus |
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Cable |
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Configuration Channel |
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Bus |
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Power |
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Ground |
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On a standard USB Type-C cable, only a single CC wire within each plug is connected through the cable to establish signal orientation
The other CC pin is repurposed as VCONN for powering electronics Also, only one set of USB 2.0 D+/D- wires are implemented
Architecture
Architecture and key words
Provider
Device Policy Manager
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Source |
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port |
Policy Engine |
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Power |
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Protocol Layer |
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Source(s) |
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Cable |
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Physical Layer |
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Detection |
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BMC |
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BFSK |
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USB Port |
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Type A/B Plug |
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CC |
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VBUS |
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identification |
(Type-C only) |
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VBUS
Consumer
Device Policy Manager
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Sink |
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Policy Engine |
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port |
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Power |
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Protocol Layer |
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Sink |
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Cable |
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Physical Layer |
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Detection |
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BFSK |
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BMC |
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USB Port |
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VBUS |
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CC |
Type A/B Plug |
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(Type-C only) |
identification |
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CC
Communication across the channel uses Biphase Mark Coding (BMC) over CC in Type C connector
USB Type-C CC Connections
DFP - |
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UFP - Sink |
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Source |
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4 possible CC |
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Connection |
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Detection |
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configurations |
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and muxes |
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control |
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Connection
Detection
•Detect attach/detach of USB ports, e.g. a DFP to a UFP
•Resolve cable orientation and twist connections to establish USB data bus routing
•Establish DFP and UFP roles between two attached ports
•Discover and configure VBUS
•USB Power Delivery Communication
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