Test Setup; Test And Configuration Software; Test Equipment - Texas Instruments TPS546D24SEVM-2PH User Manual

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 TPS546D24S 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 you 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 V
and fault thresholds, fault response, and on and off modes.

4.2 Test Equipment

4.2.1 Voltage Source
The input voltage source V
ADC to support 80-A load with 5-V input. Connect input VIN and GND to T1 and T2. If the output voltage of the
EVM is increased, the power supply can need to be capable of supplying more current.
4.2.2 Multimeters
TI recommends using two separate multimeters: one meter to measure V
4.2.3 Output Load:
TI recommends a variable electronic load for the test setup. To test the full load current this EVM supports, the
load must be capable of sinking at least 80 A.
4.2.4 Oscilloscope
When using an oscilloscope to measure the switching node voltage or voltage ripple, measure using a Tip-and-
Barrel method as Figure 4-1
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 or USB-to-GPIO2 Adapter. Purchase this adapter at http://www.ti.com/tool/usb-to-gpio2.
4.2.7 Recommended Wire Gauge
• Input VIN and GND to T1 and T2 (GND) (12-V input) – The recommended wire size is AWG #12, with the
total length of wire less than 2 feet (1 foot input, 1 foot return).
• Output T3 and GND T5 (0.8-V output) – The minimum recommended wire size is AWG #10, with the total
length of wire less than 2 feet (1 foot output, 1 foot return). A thicker wire gauge can be required to minimize
the voltage drop the wires.
10 TPS546D24S 2-Phase SWIFT
User's Guide
must be a 0-V to 20-V variable DC source capable of supplying a minimum of 16
IN
shows, or better.
™
Step-Down Converter Evaluation Module
Copyright © 2023 Texas Instruments Incorporated
trim and margin, UVLO, soft-start time, warning
OUT
and the other to measure V
IN
www.ti.com
TI Fusion Digital
.
OUT
SLUUCQ1 – MARCH 2023
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