Start-Up And Operating Procedure; Table 8-1. Test Point Functional Description; Table 8-2. List Of Terminals - Texas Instruments LMG352XEVM-04X User Manual

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8.1.1 List of Test Points
Key test points on this EVM are designed for oscilloscope probes with short ground springs. Using short ground
springs instead of alligator ground leads will minimize measurement error and produce a cleaner signal with the
fast switching GaN devices used on this EVM. The data in this user guide uses this measurement method.
NAME
VAUX
ACMGND
5V
AGND1
PWM
LDEAD1
AGND3
HDEAD1
AGND4
LOW
HIGH
AGND2
12V
PGND1
HVIN
PGND2
HVOUT
PGND3
SW1
For this EVM version, not all the test points are available on the motherboard due to the size of the daughter
card. To probe the switching node, TI recommends using a pigtail on the daughter card on PGND pin. A probe
could use the PGND pigtail and SW test point on the daughter card to complete the measurement.
8.1.2 List of Terminals
TERMINAL
J1
J5
J6
J3
J4
J2

8.2 Start-Up and Operating Procedure

The following procedure is recommended to enable the LMG352XEVM-04X with the LMG352XEVM-04X:
1. Power up the 12-V bias supply. Ensure the top right green "Aux Enable" LED is illuminated.
2. Enable PWM on the function generator.
3. Power up the high voltage input supply. Ensure the red "HV Enable" LED is illuminated when the input supply
is above 20 V.
SNOU178A – OCTOBER 2020 – REVISED FEBRUARY 2021
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Table 8-1. Test Point Functional Description

DESCRIPTION
12-V bias input connection before filter
Ground for 12-V bias input before filter
5-V bias
Analog ground for logic
Single input PWM signal
Low-side PWM signal before dead time generation
Analog ground for logic
High-side PWM signal before dead time generation
Analog ground for logic
Low-side PWM signal with dead time
High-side PWM signal with dead time
Analog ground for logic
12-V bias after filter
Power ground
DC input voltage
Power ground
DC output voltage
Power ground
Switch node voltage

Table 8-2. List of Terminals

NAME
VIN
VOUT
12V AUX
PWM INPUT
LOGIC
HB Card PIN
Copyright © 2021 Texas Instruments Incorporated
Test Procedure When Paired With LMG34XX-BB-EVM
DESCRIPTION
Input DC voltage input
Output DC voltage output
12-V bias voltage input
Single 0-V to 5-V PWM input for gate
Header to connect PWM, FAULT logic
Connector to interface LMG352XEVM-04X board
LMG352XEVM-04X User Guide 21