Test Setup; Test And Configuration Software; Test Equipment - Texas Instruments TPS546C25EVM-1PH User Manual

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2 Hardware

2.1 Test Setup

2.1.1 Test and Configuration Software

To change any of the default configuration parameters on the EVM through PMBus, obtain the
Power Designer software.
2.1.1.1 Description
The TI Fusion Digital Power Designer is the graphical user interface (GUI) configures and monitors the Texas
Instruments TPS546C25 power converter installed on this evaluation module. The TPS546C25 device is early
sampling the GUI is available from the product line. Contact local support for a copy of the GUI. The application
uses the PMBus protocol to communicate with the controller over serial bus by way of a TI USB adapter
described in Section 2.1.2.6.
2.1.1.2 Features
Some of the tasks performed 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 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.

2.1.2 Test Equipment

2.1.2.1 Voltage Source
The input voltage source V
to support a 35A load with a 5V input. Connect input VIN and GND to J2. If the output voltage of the EVM is
increased, the power supply must be able to supply more current.
2.1.2.2 Multimeters
TI recommends using two multimeters: one meter to measure V
2.1.2.3 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 able to sink at least 35A.
2.1.2.4 Oscilloscope
When using an oscilloscope to measure the switching node voltage or voltage ripple, measure using the
Tip-and-Barrel method as
2.1.2.5 Fan
During prolonged operation at high loads, provide forced air cooling with a small fan aimed at the EVM. Maintain
the surface temperature of the devices on the EVM below the rated temperature.
2.1.2.6 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.
2.1.2.7 Recommended Wire Gauge
• Input VIN and GND to J2 (12V input) – The recommended wire size is AWG #12, with the total length of
wire less than 2 feet (1 foot input, 1 foot return). Use test points labeled PVIN_SNS and PGND_SNS to for a
sense connection to the input voltage source.
• Output J3 (1.2V 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). To minimize the voltage, a thicker wire gauge is required to drop the
wires.
SLUUCZ1 – JULY 2024
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must be a 0V to 18V variable DC source that can supply a minimum of 12ADC
IN
Figure 2-1 shows for a better ripple measurement.
Copyright © 2024 Texas Instruments Incorporated
trim and margin, UVLO, soft-start time, warning
OUT
and the other to measure V
IN
TPS546C25EVM-1PH 4V to 18V, 35A, Buck Converter with PMBus and
Hardware
TI Fusion Digital
.
OUT
3
Telemetry Evaluation Module