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Test Setup
4 Test Setup
4.1 Test and Configuration Software
To change any of the default configuration parameters on the EVM through PMBus, obtain the
Power Designer
software.
4.1.1 Description
The TI Fusion Digital Power Designer is the graphical user interface (GUI) used to configure and monitor the
Texas Instruments TPSM8D6C24 power converter installed on this evaluation module. The application uses the
PMBus protocol to communicate with the controller over serial bus by way of a TI USB adapter described in
Section
4.2.6.
4.1.2 Features
Some of the tasks the user can perform with the GUI include:
•
Turn on or off the power supply output, either through the hardware control line or the PMBus operation
command.
•
Monitor real-time data. Items such as input voltage, output voltage, output current, die temperature, and
warnings and faults that are continuously monitored and displayed by the GUI.
•
Configure common operating characteristics such as the following:
– V
trim and margin
OUT
– UVLO
– Soft-start time
– Warning and fault thresholds
– Fault response
– On/off modes
This software is available for download at http://www.ti.com/tool/fusion_digital_power_designer.
4.2 Test Equipment
4.2.1 Voltage Source
The input voltage source V
A
to support 35-A load with 5-V input (or 16 A
DC
GND to T1 (PVIN) and T2/T3 (PGND). If the output voltage of the EVM is increased, the power supply may need
to supply more current.
4.2.2 Oscilloscope
An oscilloscope is recommended for measuring output noise and ripple. Output ripple must be measured using a
tip-and-barrel method.
4.2.3 Multimeters
TI recommends using two separate multimeters: one meter to measure V
4.2.4 Output Load
A variable electronic load is recommended for the test setup. To test the full load current this EVM supports, the
load should be capable of sinking at least 35 A.
4.2.5 Fan
During prolonged operation at high loads, it can be necessary to provide forced air cooling with a small fan
aimed at the EVM. Maintain the surface temperature of the devices on the EVM below their rated temperature.
4.2.6 USB-to-GPIO Interface Adapter
A communications adapter is required between the EVM and the host computer. This EVM is designed to use
TI's USB-to-GPIO adapter. Purchase this adapter at http://www.ti.com/tool/usb-to-gpio.
6
TPSM8D6C24EVM-2V0 User's Guide
must be a 0-V to 18-V variable DC source capable of supplying a minimum of 8
IN
to support a combined 70-A load). Connect input VIN and
DC
Copyright © 2021 Texas Instruments Incorporated
TI Fusion Digital
and the other to measure V
IN
SLUUCK6 – DECEMBER 2021
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.
OUT
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