Evaluating Split Rail Input; Table 4-3. Jp3 And Jp4 Selections; Table 4-4. Jp1 And J2 Selections; Table 4-5. Connector Functions - Texas Instruments TPSM8D6C24EVM-2V0 User Manual

Test Setup
Shunt Position Selection
CNTL_INPUT PMBus adapter control signal
UVLO Resistor divider to PVIN
DISABLE EN/UVLO short to ground
Table 4-4 lists the options for the AVIN pin selections on JP1 and JP2.
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.
Connector
J1
J2
T1
T2, T3
T4
T5
T6, T8

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.
8 TPSM8D6C24EVM-2V0 User's Guide

Table 4-3. JP3 and JP4 Selections

Table 4-4. JP1 and J2 Selections

Table 4-5. Connector Functions

Name Description
Micro-USB Power Micro USB connector to power EVM from a 5-V USB source
PMBus PMBus socket for TI FUSION adapter
PVIN VIN+ connector
PGND VIN– connector
AVIN External AVIN connector
VOUT_A VOUT+ connector
PGND VOUT– connector
Copyright © 2021 Texas Instruments Incorporated
www.ti.com
SLUUCK6 – DECEMBER 2021
Submit Document Feedback