Texas Instruments LMG342XEVM-04X, User Manual

Page: 1 / 32

User’s Guide
LMG342XEVM-04X User Guide
ABSTRACT
The LMG342XEVM-04X features two LMG342XR0X0 600-V GaN FETs with an integrated driver and protection
in a half-bridge configuration with all the required bias circuit and logic/power level shifting. Essential power
stage and gate-driving, high-frequency current loops are fully enclosed on the board to minimize power loop
parasitic inductance for reducing voltage overshoots and improving performance. The LMG342XEVM-04X is
configured for a socket style external connection for easy interface with external power stages to run the
LMG342XR0X0 in various applications. Refer to the LMG342XR0X0 data sheet before using this EVM.
Table of Contents
1 General TI High Voltage Evaluation User Safety Guidelines ............................................................................................. 3
1.1 Safety and Precautions...................................................................................................................................................... 4
2 Introduction ............................................................................................................................................................................. 5
2.1 LMG342XEVM-04X Daughter Card................................................................................................................................... 5
2.2 Mother Boards.................................................................................................................................................................... 9
2.3 Typical Applications............................................................................................................................................................ 9
2.4 Features............................................................................................................................................................................. 9
3 LMG342XEVM-04X Schematic ............................................................................................................................................. 10
4 Mother Board Schematic ...................................................................................................................................................... 11
5 Recommended Footprint ..................................................................................................................................................... 13
6 Test Equipment ..................................................................................................................................................................... 14
7 Test Procedure When Paired With LMG342X-BB-EVM ...................................................................................................... 15
7.1 Setup................................................................................................................................................................................ 15
7.2 Start-Up and Operating Procedure.................................................................................................................................. 16
7.3 Test Results...................................................................................................................................................................... 17
7.4 Shutdown Procedure........................................................................................................................................................ 18
7.5 Additional Operating Notes.............................................................................................................................................. 18
8 Test Procedure When Paired With LMG34XX-BB-EVM ..................................................................................................... 19
8.1 Setup................................................................................................................................................................................ 19
8.2 Start-Up and Operating Procedure.................................................................................................................................. 21
8.3 Shutdown Procedure........................................................................................................................................................ 22
8.4 Additional Operation Notes.............................................................................................................................................. 22
9 Bill of Materials ..................................................................................................................................................................... 23
10 Revision History ................................................................................................................................................................. 26
List of Figures
Figure 2-1. LMG342XEVM-04X Block Diagram.......................................................................................................................... 6
Figure 2-2. Front Side View of the EVM...................................................................................................................................... 7
Figure 2-3. Back Side View of the EVM....................................................................................................................................... 8
Figure 3-1. LMG342XEVM-04X Schematic............................................................................................................................... 10
Figure 4-1. LMG342X-BB-EVM Schematic................................................................................................................................ 11
Figure 4-2. LMG34XX-BB-EVM Schematic............................................................................................................................... 12
Figure 5-1. Recommended Footprint for LMG342XEVM-04X .................................................................................................. 13
Figure 7-1. LMG342X-BB-EVM Motherboard With LMG342XEVM-04X .................................................................................. 15
Figure 7-2. Connector and LEDs on the LMG342X-BB-EVM.................................................................................................... 16
Figure 7-3. Switch-Node Voltage Measurement with High-Bandwidth Probe and Pigtail Ground Connection.......................... 16
Figure 7-4. 85 V/ns at 400 V/20 A............................................................................................................................................. 17
Figure 7-5. 100 V/ns at 400 V/20 A........................................................................................................................................... 17
Figure 7-6. 30 V/ns at 400 V/20 A............................................................................................................................................. 18
Figure 7-7. 150 V/ns at 400 V/5 A............................................................................................................................................. 18
www.ti.com Table of Contents
SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022
Submit Document Feedback
LMG342XEVM-04X User Guide 1
Copyright © 2022 Texas Instruments Incorporated