4. Installation
UCX series – User's Manual
21
Applied firmware package: v1.1.0b7 | LDC software: v2.5.4b3
4.4.1.
Power Data Objects (USB-C)
Power Data Object (PDO) defines a power capability:
▪
Nominal voltage and maximum current
▪
A Source must have at least one PDO
▪
The Sink chooses one of the Sources PDOs
via CC communication
Powering Handshake
Dual-Role Power
#new
With USB-C the connector is the same on all products. Laptops, certain tablets and smartphones can be
both a charger and a charged device (not simultaneously). Source/Sink defines the power role the port is
currently operating in.
GND
RX2+ RX2-
VBUS sBU1 D-
D+ CC VBUS
TX1- TX1+
GND
GND
TX2+ TX2-
VBUS CC D+
D- sBU2 VBUS
RX1- RX1+
GND
GND
GND
GND
CC
GND
VBUS
VBUS
VBUS
VBUS
Detecting a valid Source-to-Sink connect
ion
I support: [email protected], 9V@3A
and 20V@3A
I request 20V@3A
Okay, I’ve set my output to 20V@3A
VBUS=0V (Vsafe)
VBUS=20V
CC
CC
CC
VBUS=5V
Source (SRC)
supply power over VBUS
Sink (SNK)
consuming power from VBUS
Dual-Role Power (DRP)
can operate as either
a Source or a Sink
Source-only
Sink-only
Dual-Role Power
Source-only
Non-functional
Functional
DRP = Sink
Sink-only
Functional
Non-functional
DRP = Source
Dual-Role Power
DRP = Sink
DRP = Source
DRPs negotiate
4.5.
USB-C Cable Recommendation
Please find the below recommendation for the applied cables:
▪
Use Full-featured USB Type-C cables made by reliable brands.
▪
USB2.0 cables miss the Superspeed channels, neither DP video nor USB3 transmission works with
them.
▪
Type-C cables certified for USB 3.x Gen1-Gen2 (5Gbps or 10Gbps) and Displayport Alternate mode
HBR2-HBR3 (5.4Gbps or 8.1Gbps) applications are recommended.
▪
Thunderbolt cables are not backwards compatible to USB3.x or Displayport unless the manufacturer
explicitly states so.
▪
Passive, 20Gbps Thunderbolt 3 cables which are also specified for USB3.x are a good, but more
expensive choice.
▪
5A charging capability is not required. All USB Type-C cables should support at least 3A (up to 60W)
charging.
▪
When more than 2m long cable is needed, please contact the sales (
) for the
cable recommendation.
