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User's Guide
LMG342XEVM-04X User Guide
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.
1 General TI High Voltage Evaluation User Safety Guidelines .............................................................................................
1.1 Safety and Precautions......................................................................................................................................................
2
Introduction.............................................................................................................................................................................5
2.1 LMG342XEVM-04X Daughter Card...................................................................................................................................
Boards....................................................................................................................................................................9
Applications............................................................................................................................................................9
2.4 Features.............................................................................................................................................................................
3 LMG342XEVM-04X Schematic.............................................................................................................................................
Schematic......................................................................................................................................................11
5 Recommended Footprint.....................................................................................................................................................
6 Test Equipment.....................................................................................................................................................................
7.1
Setup................................................................................................................................................................................15
7.2 Start-Up and Operating Procedure..................................................................................................................................
Results......................................................................................................................................................................17
Procedure........................................................................................................................................................18
7.5 Additional Operating Notes..............................................................................................................................................
8 Test Procedure When Paired With LMG34XX-BB-EVM.....................................................................................................
8.1
Setup................................................................................................................................................................................19
8.2 Start-Up and Operating Procedure..................................................................................................................................
Procedure........................................................................................................................................................22
8.4 Additional Operation Notes..............................................................................................................................................
9 Bill of Materials.....................................................................................................................................................................
10 Revision History.................................................................................................................................................................
Figure 2-1. LMG342XEVM-04X Block Diagram..........................................................................................................................
Figure 2-2. Front Side View of the EVM......................................................................................................................................
Figure 2-3. Back Side View of the
Figure 3-1. LMG342XEVM-04X Schematic...............................................................................................................................
Figure 4-2. LMG34XX-BB-EVM Schematic...............................................................................................................................
Figure 5-1. Recommended Footprint for LMG342XEVM-04X ..................................................................................................
Figure 7-1. LMG342X-BB-EVM Motherboard With LMG342XEVM-04X ..................................................................................
Figure 7-4. 85 V/ns at 400 V/20 A.............................................................................................................................................
Figure 7-5. 100 V/ns at 400 V/20 A...........................................................................................................................................
Figure 7-6. 30 V/ns at 400 V/20 A.............................................................................................................................................
Figure 7-7. 150 V/ns at 400 V/5 A.............................................................................................................................................
SNOU176A - OCTOBER 2020 - REVISED JANUARY 2022
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ABSTRACT
Table of Contents
LMG342X-BB-EVM......................................................................................................15
List of Figures
EVM.......................................................................................................................................8
Schematic................................................................................................................................11
LMG342X-BB-EVM....................................................................................................16
Copyright © 2022 Texas Instruments Incorporated
Table of Contents
Connection..........................16
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Summary of Contents for Texas Instruments LMG342XEVM-04X
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Page 1: Table Of Contents
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. - Page 2 Table 2-3. Power Pin Function Description..........................6 Table 8-1. Test Point Functional Description..........................21 Table 8-2. List of Terminals................................ Table 9-1. Bill of Materials for LMG342XEVM-04X ........................23 Table 9-2. Bill of Materials for LMG342X-BB-EVM........................Trademarks All trademarks are the property of their respective owners.
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Page 3: General Ti High Voltage Evaluation User Safety Guidelines
• Limitation for Safe Use: – EVMs are not to be used as all or part of a production unit. SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 LMG342XEVM-04X User Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 4: Safety And Precautions
For safety, use of isolated test equipment with overvoltage and overcurrent protection is highly recommended. LMG342XEVM-04X User Guide SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 5: Introduction
Introduction 2 Introduction The LMG342XEVM-04X operates as a half-bridge daughter card that can be either part of a larger custom designed system or paired with the mother board. TI provides two mother boards (LMG342X-BB-EVM and LMG34XX-BB-EVM) to interface with LMG342XEVM-04X. LMG342X-BB-EVM can support up to 4-kW, and LMG34XX-BB-EVM can provide up to 1.7-kW. -
Page 6: Figure 2-1. Lmg342Xevm-04X Block Diagram
EVM. 2.1.1 FAULT and OC The FAULT and OC pins of the LMG342XEVM-04X are active low when an undervoltage lockout occurs on an auxiliary voltage rail, when an overtemperature event occurs, or when an overcurrent/short-circuit event occurs on the LMG342XR0X0. -
Page 7: Figure 2-2. Front Side View Of The Evm
LMG342XEVM-04X. 2.1.3 Bootstrap Mode The LMG342XEVM-04X card can be modified to operate in bootstrap mode, where the 12-V bias voltage is used to power both LMG342XR0X0 devices. This mode can be achieved by the following modifications to the EVM: 1. Remove R1. - Page 8 Introduction www.ti.com Figure 2-3. Back Side View of the EVM LMG342XEVM-04X User Guide SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
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Page 9: Mother Boards
There is an option to disable the PWM input to the daughter card in the event of a fault signal from the LMG342XEVM-04X. When the FAULT Protect jumper is placed in the EN mode, PWM is disabled when either LMG342XR0X0 has an active fault. This disable is not latching, so PWM immediately resumes when the fault clears. -
Page 10: Lmg342Xevm-04X Schematic
4.7uF 4.7uF SN6505BDBVR 4.7uF SN6505BDBVR ISO_RET_H_B ISO_RET_L_B Max. 1A current on the FET PGND AGND AGND Figure 3-1. LMG342XEVM-04X Schematic LMG342XEVM-04X User Guide SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 11: Mother Board Schematic
0.1uF 0.1uF PGND5 PGND PGND AGND AGND AGND AGND1 PGND4 PGND 3267 PGND1 PGND PGND2 PGND Figure 4-1. LMG342X-BB-EVM Schematic SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 LMG342XEVM-04X User Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 12: Figure 4-2. Lmg34Xx-Bb-Evm Schematic
282834-2 AGND1 AGND PGND PGND Green PGND2 AGND ACMGND AGND2 Copyright © 2016, Texas Instruments Incorporated Figure 4-2. LMG34XX-BB-EVM Schematic LMG342XEVM-04X User Guide SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 13: Recommended Footprint
5 Recommended Footprint When the EVM daughter card is used in a custom design system, the recommended footprint to interface with the LMG342XEVM-04X daughter card is shown below. Figure 5-1. Recommended Footprint for LMG342XEVM-04X SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022... -
Page 14: Test Equipment
50 kHz to 200 kHz in hard-switching converters. Note TI provides a custom interposer board that must be used when the LMG342XEVM-04X is paried with the LMG34XX-BB-EVM. The interposer board is not needed with LMG342x-BB-EVM. Oscilloscope: Capable of at least 200 MHz operation. A 1 GHz or greater oscilloscope and probes with short ground springs are required for accurate measurements. -
Page 15: Test Procedure When Paired With Lmg342X-Bb-Evm
The inductor on LMG342X-BB-EVM is capable of around 3-kW operation. For higher power levels, use an external inductor. TI recommends the following procedure to set up the LMG342X-BB-EVM with the LMG342XEVM-04X: 1. Connect the LMG342XEVM-04X to LMG342X-BB-EVM as shown in Figure 7-1. -
Page 16: Start-Up And Operating Procedure
(up to 480V). As the voltage is ramping up, the HV LED will turn on and become brighter. Figure 7-3. Switch-Node Voltage Measurement with High-Bandwidth Probe and Pigtail Ground Connection LMG342XEVM-04X User Guide SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 17: Test Results
Figure 7-4. 85 V/ns at 400 V/20 A Load Current(10A/div) Slew rate: 100V/ns Switch Node Voltage(100V/div) Figure 7-5. 100 V/ns at 400 V/20 A SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 LMG342XEVM-04X User Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 18: Shutdown Procedure
Fault protection on the LMG342X-BB-EVM is not latching, therefore PWM will resume if a fault clears and the LMG342X-BB- EVM is still operational. LMG342XEVM-04X User Guide SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 19: Test Procedure When Paired With Lmg34Xx-Bb-Evm
LMG342XEVM-04X connected to the LMG34XX-BB-EVM. Note TI provides a custom interposer board that must be used when the LMG342XEVM-04X is paired with the LMG34XX-BB-EVM. The interposer board is not needed with LMG342x-BB-EVM. Figure 8-1. LMG342XEVM-04X Connected to the LMG34XX-BB-EVM SNOU176A –... -
Page 20: Figure 8-2. Recommended Connection Points
Figure 8-2. Recommended Connection Points PCB Notes: • A: Probe points for gate drive logic • B: 100-mil header for PWM input, PWM signals to LMG342XEVM-04X and FAULT output • C: BNC connector for PWM input • D: 12-V bias supply input •... -
Page 21: Start-Up And Operating Procedure
Connector to interface LMG342XEVM-04X board 8.2 Start-Up and Operating Procedure The following procedure is recommended to enable the LMG342XEVM-04X with the LMG342XEVM-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. -
Page 22: Shutdown Procedure
Fault protection on the LMG34XX-BB-EVM is not latching, therefore PWM will resume if a fault clears and the LMG34XX-BB- EVM is still operational. LMG342XEVM-04X User Guide SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... -
Page 23: Bill Of Materials
Bill of Materials 9 Bill of Materials Table 9-1. Bill of Materials for LMG342XEVM-04X DESIGNATOR DESCRIPTION PART NUMBER C1, C11 CAP, CERM, 10 µF, 25 V,+/- 10%, X7R, AEC-Q200 Grade 1, 1206 TMK316AB7106KLHT C2, C12 CAP, CERM, 0.22 µF, 16 V,+/- 10%, X7R, AEC-Q200 Grade 1, 0402... -
Page 24: Table 9-2. Bill Of Materials For Lmg342X-Bb-Evm
Bill of Materials www.ti.com Table 9-1. Bill of Materials for LMG342XEVM-04X (continued) DESIGNATOR DESCRIPTION PART NUMBER RES, 2.05, 1%, 0.25 W, AEC-Q200 Grade 0, 1206 CRCW12062R05FKEA R3, R12, R18 RES, 0, 5%, 0.1 W, AEC-Q200 Grade 0, 0402 ERJ-2GE0R00X R5, R14, R17 RES, 20 k, 5%, 0.1 W, AEC-Q200 Grade 0, 0402... - Page 25 SN74LVC3G14DCUTG4 1A SIMPLE SWITCHER® Power Module with 20V Maximum Input LMZ12001EXTTZ/NOPB Voltage for Military and Rugged Applications, 7 pin TO-PMOD SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 LMG342XEVM-04X User Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated...
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Page 26: Revision History
Added the Test Results section........................• Revised the Test Procedure When Paired With LMG34XX-BB-EVM section...........19 • Updated Table 9-1 ............................LMG342XEVM-04X User Guide SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated... - Page 27 STANDARD TERMS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms set forth herein.
- Page 28 www.ti.com Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: FCC NOTICE: This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and software developers to write software applications for use with the end product.
- Page 29 www.ti.com Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à...
- Page 30 www.ti.com EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices.
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Page 31: Evm
Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2019, Texas Instruments Incorporated... - Page 32 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. TI objects to and rejects any additional or different terms you may have proposed. IMPORTANT NOTICE Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2022, Texas Instruments Incorporated...
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