5.1k
R14
GND
CC1
5.1k
R16
GND
CC2
1
2
3
J13
5-146278-3
1
2
3
J14
5-146278-3
Ra
Rd
Ra
Rd
TP15
TP16
1.0k
R17
1.0k
R15
TPS25810EVM-745 Features
6
TPS25810EVM-745 Features
The TPS25810EVM-745 allows for all the features of the TPS25810 to be tested with and without a USB
Type-C cable and external device. Below are the most common types of situations that can happen with
the TPS25810EVM-745 and within each section is an explanation of how to test each situation with and
without external components. Keep in mind how the test jumpers J13 and J14 (which control CC1 and
CC2 respectively) connect to the TPS25810 and the resistors. See
to see how they are
connected.
Figure 7. Schematic Showing How CC1 and CC2 are Connected to Jumpers J14 and J15 Respectively
CAUTION
When connecting a physical USB Type-C cable into the port of the EVM make
sure to disconnect the jumpers (J13, J14) and disconnect any loads on the
jumper J7 (which is connected to OUT pin) in order to avoid interference on the
CC lines.
6.1
No Connection to EVM
When nothing is connected to the output of the EVM then the TPS25810 will not output any power over
the OUT lines. In this mode, the TPS25810 will only consume 5
μ
A.
In terms of replicating this on the EVM, make sure that nothing is connected to jumpers J13, J14, and J7
which control what is connected to CC1, CC2, and OUT respectively.
6.2
Connecting a DFP Device
The TPS25810 is a downstream facing port (DFP) controller and continuously monitors the CC lines to
see if an upstream facing port (UFP) device is connected. The way it determines if an UFP device is
connected is if the CC lines are connected to a specific set of resistors values. When connecting one DFP
device to another DFP device, both devices will continue to monitor the CC lines for a valid connection
and will not turn on the output lines. This can be tested on the EVM by connecting a DFP device to the
TPS25810EVM-745 or by connecting 2 TPS25810EVM-745 together through the USB port.
6.3
Connecting a UFP Device
There are two types of UFP devices that can be connected to a DFP device: a powered UFP device or a
nonpowered UFP device. As soon as a UFP device is connected to the EVM, the UFP# LED will light up.
The way the TPS25810 detects a UFP device is by sensing if only one of the CC lines is connected to a
Ra resistor value. And if the UFP device is powered than the other CC line should be connected to a Rd
resistor value. The TPS25810EVM-745 will also report via the USB Type-C cable’s polarity/orientation with
the POL# signal and LED. To test these two types of UFP devices along with their different cable
polarities on the EVM set the CC1, CC2, and OUT jumpers based on
also shows how
POL# and UFP# LEDs will behave based on the jumper connections.
8
TPS25810EVM-745 User's Guide
SLVUAI0A – September 2015 – Revised September 2015
Copyright © 2015, Texas Instruments Incorporated
