Texas Instruments LM5123EVM-BST, User Manual

Page: 6 / 27

Table 2-3. Programmable Jumper Connections (continued)
Jumper Pins Description Default Connection
J11 Pin 1 to Pin 2 Bypass D1 to tie either the V
IN
or V
OUT
nets to the BIAS pin X
Open Either V
IN
or V
OUT
is supplied through D1 to the BIAS pin
J12 Pin 1 to Pin 2 V
IN
is supplied to the BIAS pin. This is the default connection X
Pin 2 to Pin 3 V
OUT
is supplied to the BIAS pin
J13 Pin 1 to Pin 2 Connect an auxiliary power supply can be used to supply
power to the BIAS pin. J11 should be open if this is populated
Pin 2 to Pin 3 Connect the VCC and V
IN
pin
Open X
J14 Pin 1 to Pin 2 Configures light load switching operation to be FPWM X
Pin 2 to Pin 3 Configures light load switching operation to be diode emulation
Open Configures light load switching operation to be skip
TP6 Positive input to the VAUX net
TP7 Negative input to the VAUX net
TP8 Positive input to the TRK pin of the LM5123-Q1
TP9 Negative input to the TRK pin of the LM5123-Q1
Table 2-4 indicates the dedicated voltage probe points of the EVM. These points are used to make
measurements on the EVM.
Table 2-4. Probe Points
Sense Point Name Description
TP1 VIN+ Sense point for the positive input voltage
TP2 VOUT+ Sense point for the positive output voltage
TP3 SW Sense point for the switch node of the boost
controller
TP4 GND Sense point for the negative output voltage
TP5 VIN- Sense point for the negative input voltage
J3 PGND Power ground connection
J6 PGND Power ground connection
J8 Probe point for many of the LM5123 control signals
1 BIAS
2 PGOOD
3 UVLO
4 COMP
5 SS
6 AGND
EVM Setup www.ti.com
6 LM5123EVM-BST Evaluation Module SNVU737A – DECEMBER 2020 – REVISED DECEMBER 2021
Submit Document Feedback
Copyright © 2021 Texas Instruments Incorporated