www.ti.com
Using the TPS65987-90EVM
7
SLVUBF3A – May 2018 – Revised August 2018
Submit Documentation Feedback
Copyright © 2018, Texas Instruments Incorporated
TPS65987-90 Evaluation Module
3
Using the TPS65987-90EVM
This section discusses how to power the EVM, configure the firmware, and how to debug.
3.1
Powering the TPS65987-90EVM
The main power supply for the EVM is the barrel jack (J9), which accepts 19 V to 20 V via a barrel jack
adapter. The EVM can also be powered with an external power supply on SYS_PWR (pin 1 of J4, J5, J6,
or J7). The input voltage can range from 5 V to 20 V, but configure the appropriate power profile for
PP_HV in the firmware using the configuration tool. The EVM can also be powered as a sink through a
USB Type-C cable from a source adaptor, EVM, or device.
3.2
Firmware Configurations
Out of the box, the TPS65987-90EVM is configured to emulate a single port laptop computer. This
configuration can be used to source or sink power known as (DRP), and this configuration sets DFP_D
(Downward Facing Port). on DP expansion connector a DP_EXPANSION (source) EVM can be connected
to test Display port alternate mode. If different configurations are required to test your system, use the
TPS65987_8 Application Configuration Tool (GUI)
to create a configuration or load a different
configuration template.
3.3
Debugging the EVM
The following checks can help resolve issues when connecting the EVM to another EVM or USB Type-C
device and no status LEDs are on:
•
Make sure that a firmware image is loaded on the TPS65987-90EVM, using the
TPS65987_8
Application Configuration Tool (GUI)
.
•
Make sure the CC lines are toggling for dual-role port functionality.
•
Make sure the following system supplies:
–
P3V3 = 3.3 V
–
P5V0 = 5 V
–
Barrel jack / SYS_PWR = 20 V (when plugged in)
–
VAR_DCDC = 5 V (when barrel jack is plugged in without a USB Type-C attached cable or device)
–
V
BUS
= 5 V, 9 V, 15 V, or 20 V (when USB Type-C port is attached to another EVM or device)