5 EVM Configuration Using the Fusion GUI
The TPS546B24A IC leaves the factory pre-configured. The factory default settings for the parameters can be
found in the data sheet. If configuring the EVM to settings other than the factory defaults, use the software
described in
. It is necessary to have the input voltage applied to the EVM prior to launching the
software so that the TPS546B24A can respond to the GUI and the GUI can recognize the device. The default
configuration for the EVM to stop converting is set by the EN/UVLO resistor divider to a nominal input voltage of
4.75 V; therefore, if it is necessary to avoid any converter activity during configuration, an input voltage less than
4.75 V should be applied. TI recommends an input voltage of 3.3 V.
5.1 Configuration Procedure
1. Adjust the input supply to provide 3.3 V
DC
, current limited to 1 A.
2. Apply the input voltage to the EVM. See
for connections and test setup.
3. Launch the Fusion GUI software. See the screen shots in
4. Configure the EVM operating parameters as desired.
By default, the pinstrap resistors configure U1_P1 as the loop controller and U1_P2 as the loop follower.
6 Test Procedure
6.1 Line and Load Regulation and Efficiency Measurement Procedure
1. Set up the EVM as
describe.
2. Set the electronic load to draw 0 A
DC
.
3. Increase V
IN
from 0 V to 12 V using voltage meter to measure input voltage.
4. Use the other voltage meter to measure output voltage V
OUT
.
5. Vary the load from 0 to 40 A
DC
. V
OUT
should remain in regulation as defined in
6. Vary V
IN
from 5 V to 18 V. V
OUT
should remain in regulation as defined in
.
7. Decrease the load to 0 A.
8. Decrease V
IN
to 0 V.
EVM Configuration Using the Fusion GUI
14
TPS546B24A 2-Phase SWIFT™ Step-Down Converter Evaluation Module
User's Guide
SLUUC48A – FEBRUARY 2020 – REVISED FEBRUARY 2022
Copyright © 2022 Texas Instruments Incorporated