Texas Instruments TPSM8D6C24, User Manual, Page: 8 / 38

Table 4-4. JP1 and J2 Selections
Shunt Position Selection
AVIN AVIN pin connected to AVIN input through 10-Ω resistor. Use this selection when testing with a split rail input.
PVIN AVIN pin connected to PVIN through 10-Ω resistor
Table 4-5 lists the EVM connector functions.
Table 4-5. Connector Functions
Connector Name Description
J1 Micro-USB Power Micro USB connector to power EVM from a 5-V USB source
J2 PMBus PMBus socket for TI FUSION adapter
T1 PVIN VIN+ connector
T2, T3 PGND VIN– connector
T4 AVIN External AVIN connector
T5 VOUT VOUT+ connector
T6, T8 PGND VOUT– connector
4.4 Evaluating Split Rail Input
The default configuration of the EVM is for single rail input. Split rail input enables operation with 3.3-V PVIN. For
split rail operation, configure the jumpers on the EVM as follows:
1. Move the jumper JP1 and JP2 to AVIN position to disconnect the AVIN pin from the PVIN pins.
2. Apply the AVIN input to T4. 4-V or greater AVIN is required to bring the VDD5 voltage high enough to enable
conversion.
3. If operation with 3.3-V PVIN is needed and the CNTL jumpers (JP3 and JP4) are in UVLO position,
the resistor divider at the EN/UVLO will need to be changed. Alternately, move the CNTL jumpers to
CNTL_INPUT position and use the control signal to enable conversion or use the ON_OFF_CONFIG and
OPERATION commands to enable conversion.
5 EVM Configuration Using the Fusion GUI
The TPSM8D6C24 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
Section 4.1 . It is necessary to have the input voltage applied to the EVM prior to launching the
software so that the TPSM8D6C24 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
3.5 V, therefore, if it is necessary to avoid any converter activity during configuration, an input voltage less than
3.5 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 Section 4.2 for connections and test setup.
3. Launch the Fusion GUI software. See the screen shots in Section 10 for more information.
4. Configure the EVM operating parameters as desired.
6 Test Procedure
6.1 Line and Load Regulation and Efficiency Measurement Procedure
1. Set up the EVM as Section 4.2 and Section 6.2 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 70 A
DC
. V
OUT
should remain in regulation as defined in Table 2-1 .
6. Vary V
IN
from 5 V to 16 V. V
OUT
should remain in regulation as defined in Table 2-1 .
7. Decrease the load to 0 A.
8. Decrease V
IN
to 0 V.
Test Setup www.ti.com
8 TPSM8D6C24 2-Phase Power Module Evaluation Module User's Guide SLUUCL8A – DECEMBER 2021 – REVISED FEBRUARY 2022
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