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EVM User's Guide: LMG1020EVM-006
Using the LMG1020EVM-006
Alberto Doronzo, Daniel Ruiz
1 Introduction
The LMG1020 device is a single, low-side driver designed for driving GaN FETs and logic-level MOSFETs
in high-frequency applications including LiDAR, time-of-flight, facial recognition, and any power converters
involving low side drivers. The LMG1020EVM-006 is designed to evaluate the LMG1020. This EVM consists
of one Gallium Nitride (GaN) enhancement mode FET driven by one LMG1020 and the drain of the GaN FET
is connected to an unpopulated resistive load representing a typical laser diode load for LiDAR (Light Detection
And Ranging) applications.
This User's Guide shows a circuit and the list of materials describing how to power the board up and how to
configure the board. The EVM is designed to accelerate the evaluation of the LMG1020.
This EVM is not intended to be used as a standalone product but is intended to evaluate the switching
performance of LMG1020.
This User's Guide describes correct operation and measurement of the EVM, as well as the EVM construction
and typical performance.
SNOU150D – JANUARY 2018 – REVISED APRIL 2025
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Copyright © 2025 Texas Instruments Incorporated
Introduction
Using the LMG1020EVM-006
1
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Summary of Contents for Texas Instruments LMG1020
- Page 1 The LMG1020EVM-006 is designed to evaluate the LMG1020. This EVM consists of one Gallium Nitride (GaN) enhancement mode FET driven by one LMG1020 and the drain of the GaN FET is connected to an unpopulated resistive load representing a typical laser diode load for LiDAR (Light Detection And Ranging) applications.
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Page 2: Typical Applications
The input pulse signal is used to pulse the current through the load (not populated out-of-the-box), to achieve 1-ns to 2-ns wide current pulses, which are the state-of-the-art target for LiDAR systems. The EVM features a LMG1020, driving a single EPC2019 FET referenced to ground and with the drain connected to the unpopulated resistive load. - Page 3 The LMG1020EVM also includes the SN74LVC1G08, a single 2-input positive AND gate which provides the following features: • Buffer for the LMG1020 input • Used to shorten input pulse width by using a R-C filter on one input of the AND gate...
- Page 4 • Limitation for Safe Use: – EVMs are not to be used as all or part of a production unit. Using the LMG1020EVM-006 SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated...
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Page 5: Safety And Precautions
For safety, use of isolated test equipment with overvoltage and overcurrent protection is highly recommended. SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Using the LMG1020EVM-006 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated... -
Page 6: Electrical Performance Specifications
Determined by the thermal dissipation; depending on the magnitude of the current pulse and duty cycle. The thermal limitation of the resistor load, R5–R8, when populated is explained in more detail in Section Using the LMG1020EVM-006 SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated... - Page 7 Figure 6-1. Schematic View of Unpopulated Load Resistors R5–R8 SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Using the LMG1020EVM-006 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated...
- Page 8 R8). Remove resistor load before Anode using laser diode Cathode Anode Figure 6-2. Populate Load Resistors R5–R8 Out-of-the-Box and Depopulate Before Testing Laser Diode Using the LMG1020EVM-006 SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated...
- Page 9 LMG1020YFFR 4.99k PGND 20pF 100nF SN74LVC1G08DCKR Figure 7-1. Power Stage Schematic (DNP = Do Not Place, Not Present On Board) SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Using the LMG1020EVM-006 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated...
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Page 10: Evm Kit Contents
High voltages that may cause injury exist on this evaluation module (EVM). Please ensure all safety procedures are followed when working on this EVM. Never leave a powered EVM unattended. Using the LMG1020EVM-006 SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated... -
Page 11: Test Point
Connected to PGND, the common for the input supply of the power stage, internally PGND star-connected to GND Connected to IN+ pin of the LMG1020, this is the positive logic input. Figure 9-2. Recommended Use for Ground Spring Clip Test Points SNOU150D – JANUARY 2018 – REVISED APRIL 2025... - Page 12 Input voltage connection terminals (MAX: 75 V , 0.2 A) Connector for function generator input, connected through a buffer to the Input signal positive input of the LMG1020 Using the LMG1020EVM-006 SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Submit Document Feedback...
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Page 13: Test Procedure
1-2 ns visible on the IN+ test point. To bypass the pulse shortener populate R3 with a 0-Ω resistor and remove R9 and R10 to disconnect the AND gate input and output respectively. SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Using the LMG1020EVM-006 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated... -
Page 14: Shutdown Procedure
To bypass it, the DNP resistor R3 has to be placed and resistor R10 has to be removed. • Out-of-the-box the resistor load, R5 - R8, is not populated (DNP). Using the LMG1020EVM-006 SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated... - Page 15 3-5nH), the oscillation observed is at 250MHz, which would imply a gate loop inductance of ~40pH. This is therefore pickup noise. SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Using the LMG1020EVM-006 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated...
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Page 16: Evm Assembly Drawing And Pcb Layout
12 EVM Assembly Drawing and PCB Layout Figure 12-1. LMG1020EVM-006 Top Layer and Components Figure 12-2. LMG1020EVM-006 Bottom Layer and Components Using the LMG1020EVM-006 SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated... -
Page 17: List Of Materials
Changes from Revision C (May 2020) to Revision D (April 2025) Page • Changed part U1 from LP2981A-50DBVR to LP2981AIM5-5.0/NOPB..............9 • Changed part U1 from LP2981A-50DBVR to LP2981AIM5-5.0/NOPB............17 SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Using the LMG1020EVM-006 Submit Document Feedback Copyright © 2025 Texas Instruments Incorporated... - Page 18 Changed 210ps to 400ps in Features section....................• Added SN74LVC1G08 description to the features list..................2 • Changed LMG1020 part number from XLMG1020A0 to LMG1020YFFR............9 • Added Pulse Shortener description to the test procedure................Using the LMG1020EVM-006 SNOU150D – JANUARY 2018 – REVISED APRIL 2025 Submit Document Feedback Copyright ©...
- Page 19 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 20 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 21 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 22 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.
- Page 23 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 © 2023, Texas Instruments Incorporated...
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Page 24: Important Notice
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 © 2025, Texas Instruments Incorporated...
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