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Texas Instruments LMG342XEVM-04X, User Manual

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Texas Instruments LMG342XEVM-04X User Manual Download Page 20

Figure 8-2

 shows the LMG34XX-BB-EVM power and probe 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
• E: FAULT protection option header
• F: Power stage high voltage input
• G: Probe point for power stage switch node
• H: Power stage high voltage output

To connect the LMG342XEVM-04X to the LMG34XX-BB-EVM:

1. Connect the oscilloscope or multimeter probes to the desired test points in A or G.
2. Connect the 12-V bias supply, connect load to output, and connect the input supply to input.
3. Connect the function generator to either the BNC connector PWM input at C or 100-mil header connector 

input at pin 6 (PWM) and pin 5 (GND) at B.

4. Connect 12-V bias supply to the fan attached on the EVM, or enable an external fan to direct airflow across 

the heat sink attached to the LMG342XEVM-04X.

Test Procedure When Paired With LMG34XX-BB-EVM

www.ti.com

20

LMG342XEVM-04X User Guide

SNOU176A – OCTOBER 2020 – REVISED JANUARY 2022

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Copyright © 2022 Texas Instruments Incorporated

Summary of Contents for LMG342XEVM-04X

Page 1: ...en 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 ...

Page 2: ...on Description 6 Table 8 1 Test Point Functional Description 21 Table 8 2 List of Terminals 21 Table 9 1 Bill of Materials for LMG342XEVM 04X 23 Table 9 2 Bill of Materials for LMG342X BB EVM 24 Trademarks All trademarks are the property of their respective owners Trademarks www ti com 2 LMG342XEVM 04X User Guide SNOU176A OCTOBER 2020 REVISED JANUARY 2022 Submit Document Feedback Copyright 2022 Te...

Page 3: ...interface circuits power supplies evaluation modules instruments meters scopes and other related apparatus used in a development environment exceeding 50 VRMS 75 VDC must be electrically located within a protected Emergency Power Off EPO power strip Use a stable and non conductive work surface Use adequately insulated clamps and wires to attach measurement probes and instruments No freehand testin...

Page 4: ...VM powered when unattended WARNING Hot surface Contact may cause burns Do not touch WARNING High Voltage Electric shock is possible when connecting board to live wire Board must be handled with care by a professional For safety use of isolated test equipment with overvoltage and overcurrent protection is highly recommended General TI High Voltage Evaluation User Safety Guidelines www ti com 4 LMG3...

Page 5: ...ductance signal to ground connection switched node capacitance and thermal heat dissipation Table 2 1 EVM Version Lookup Table EVM NAME FEATURED GaN FET WITH INTEGRATED DRIVER AND PROTECTION LMG3422EVM 041 LMG3422R050 LMG3422EVM 043 LMG3422R030 LMG3425EVM 041 LMG3422R050 LMG3425EVM 043 LMG3425R030 There are 12 logic pins on the LMG342XEVM 04X Table 2 2 Logic Pin Function Description PIN PIN DESIGN...

Page 6: ...gized Take proper precautions when working with the 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 The signals are level shifted to AGND Refer to the LMG342XR0X0 data sheet for operation details...

Page 7: ...de on D1 such as UFM15PL TP 4 Adjust Rdrv resistor for the low side to be above 70 kΩ which corresponds to a slew rate below 60 V ns for the low side 2 1 4 Heat Sink The heat sink is installed to help with heat dissipation of the LMG342XR0X0 Exposed copper pads are attached to the die attach pad DAP on the high side and low side devices to provide a low thermal impedance point for the heat sink Th...

Page 8: ...Figure 2 3 Back Side View of the EVM Introduction www ti com 8 LMG342XEVM 04X User Guide SNOU176A OCTOBER 2020 REVISED JANUARY 2022 Submit Document Feedback Copyright 2022 Texas Instruments Incorporated ...

Page 9: ...latching so PWM immediately resumes when the fault clears If the FAULT Protect mode is not desired that mode can be disabled by placing the jumper in the DIS position The FAULT LED will still illuminate when either LMG342XR0X0 has an active fault regardless of the position of FAULT Protect jumper 2 3 Typical Applications The LMG342XEVM 04X is designed for use in AC DC DC DC and DC AC applications ...

Page 10: ...20161T 4R7MS Max 1A current on the FET 0 22µF C12 0 22µF C2 3 2 1 4 5 6 T2 750315371 5V 5V_H PGND TP3 PGND TP6 SW HV TP5 PGND HVBUS SW 2 4 1 3 D2 ISONC3 3 2 1 4 5 6 T1 750315371 2 4 1 3 D3 VCC1 1 VCC2 16 EN1 7 EN2 10 INA 3 INB 4 INC 5 IND 11 OUTA 14 OUTB 13 OUTC 12 OUTD 6 GND1 2 GND1 8 GND2 9 GND2 15 ISO7741FDBQR U3 L1 L2 i INGND i INGND i INGND i INGND 0 R10 1 2 3 4 L3 1 2 3 4 L4 Top_FET_PWM Top_...

Page 11: ..._FET_TEMP_FILT HS_FET_TEMP_FILT 3 5 6 U2B VCC 8 GND 4 U2C AGND AGND 5V AGND AGND Red 1 2 LS_FLT LS L29K G1J2 1 Z 5V AGND AGND 5K R3 3224X 1 502E 5K R15 3224X 1 502E 5V 1 2 J12 282834 2 AGND 5V AGND 25V 10uF C15 6 3V 100uF C17 22nF 50V C16 33 2k R28 22nF 50V C20 AGND 600V 150uF C25 3 3k R1 3 3k R5 LS_FET_OCZ HS_FET_OCZ 7 1 2 U2A HS_FET_FAULTZ 1 2 3 J14 TSW 103 07 G S SH J5 SNT 100 BK G J17 3267 J16...

Page 12: ... 630V C16 1µF C18 AGND 1µF C20 LOW_2 HIGH_2 HIGH_2 LOW_2 5 4 1 2 3 6 J4 TSW 106 07 G S 1µF C8 VAUX ACMGND 1 2 3 4 5 6 J2 0448120024 AGND1 AGND4 5V AGND 3 4 5 2 U1B SN74LVC2G14DCKR AGND3 0 R23 0 R21 IN 1 OUT 3 GND 2 TAB 4 U4 LM2940IMP 5 0 NOPB 33µF C19 10µF C21 12V 12V 12V Green 1 2 D4 Red 1 2 D3 1 6k R6 1 6k R8 30k R10 30k R16 30k R11 30k R17 30k R18 30k R12 30k R13 30k R19 30k R20 30k R14 1 2 3 J...

Page 13: ...footprint to interface with the LMG342XEVM 04X daughter card is shown below Figure 5 1 Recommended Footprint for LMG342XEVM 04X www ti com Recommended Footprint SNOU176A OCTOBER 2020 REVISED JANUARY 2022 Submit Document Feedback LMG342XEVM 04X User Guide 13 Copyright 2022 Texas Instruments Incorporated ...

Page 14: ...r 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 DC Multimeter s Capable of 600 V measurement suitable for determining operation and efficiency if desired DC Load Capable of 600 V operation at up to 20 A in current mode operation Fan For the heatsi...

Page 15: ...Pin 1 to Pin 2 for header J7 and J14 Pin1 of J7 and J14 are indicated in Figure 7 2 This action allows the two PWM signals to directly control the high side and low side devices 7 If fault interlock feature is desired please connect jumper J10 and J11 Otherwise disconnect them and the PWM signals can always pass through to the devices 8 Set the signal generator to a desired frequency and duty cycl...

Page 16: ...e the fast switching transient in the switch node it is recommended to use the high bandwidth high voltage passive probes with minimized ground loop connections 6 It is recommended to add common mode chokes to the measurement signals and to the power input output connections 7 Enable the high voltage power supply and make sure to ramp the voltage up gradually from 0V to the desired bus voltage up ...

Page 17: ...onnecting 20 kohm between Rdrv and ground From this waveform a turn on voltage slew rate of 85 V ns is observed at 400 V 20 A switching conditions The turn on slew rate of the device can be easily adjusted from 30V ns to 150V ns by changing the Rdrv resistor values This is also verified from the test results shown in Figure 7 7 The adjustable slew rate feature provides a flexibility to adapt the d...

Page 18: ...upply then PWM Wait until red HV Enable LED turns off 2 Disable the 12 V bias supply 7 5 Additional Operating Notes 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 Test Procedure When Paired With LMG342X BB EVM www ti com 18 LMG342XEVM 04X User Guide SNOU176A OCTOBER 2020 REVISED JANUARY 2022 Submit Docu...

Page 19: ...ows the 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 www ti com Test Procedure When Paired With LMG34XX BB EVM SNOU176A OCTOBER 2020 REVISED JANUARY 2022 Submit Docum...

Page 20: ...B EVM 1 Connect the oscilloscope or multimeter probes to the desired test points in A or G 2 Connect the 12 V bias supply connect load to output and connect the input supply to input 3 Connect the function generator to either the BNC connector PWM input at C or 100 mil header connector input at pin 6 PWM and pin 5 GND at B 4 Connect 12 V bias supply to the fan attached on the EVM or enable an exte...

Page 21: ...r 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 Table 8 2 List of Terminals TERMINAL NAME DESCRIPTION J1 VIN Input DC ...

Page 22: ...f the high voltage power supply then PWM Wait until the red HV Enable LED turns off 2 Disable the 12 V bias supply 8 4 Additional Operation Notes 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 Test Procedure When Paired With LMG34XX BB EVM www ti com 22 LMG342XEVM 04X User Guide SNOU176A OCTOBER 2020 RE...

Page 23: ...P CERM 4 7 uF 16 V 10 X7R AEC Q200 Grade 1 0805 GCM21BR71C475KA73L C39 C40 2 CAP CERM 43 pF 50 V 5 C0G NP0 AEC Q200 Grade 1 0402 GCQ1555C1H430JB01D C42 C43 2 CAP CERM 100 pF 50 V 5 C0G NP0 AEC Q200 Grade 1 0402 CGA2B2C0G1H101J050BA D1 1 Diode Schottky 650 V 1 A SMB GB01SLT06 214 D2 D3 2 Bridge Rectifier Single Phase Schottky 40V Surface Mount MBS KMB24STR D5 D6 2 Diode Zener 16 V 500 mW AEC Q101 S...

Page 24: ...23 6 SN6505BQDBVTQ1 Table 9 2 Bill of Materials for LMG342X BB EVM DESIGNATOR QTY DESCRIPTION PART NUMBER 5V 12V HVIN HVOUT SW TACH VAUX 7 Test Point Compact Red TH 5005 5V_EN HVIN_EN 2 LED Green SMD LG L29K G2J1 24 Z ACMGND AGND1 AGND2 PGND4 PGND5 5 Test Point Compact Black TH 5006 C1 C6 C8 C9 C18 5 CAP CERM 1 µF 25 V 10 X7R AEC Q200 Grade 1 0603 CGA3E1X7R1E105K080AD C2 C3 2 CAP CERM 1600 pF 50 V...

Page 25: ...table Labels 1 250 W x 0 250 H 10 000 per roll THT 13 457 10 R1 R5 R29 R30 4 RES 3 3 k 5 0 1 W AEC Q200 Grade 0 0603 CRCW06033K30JNEA R2 R4 R9 3 RES 0 5 0 1 W AEC Q200 Grade 0 0603 CRCW06030000Z0EA R3 R15 2 Trimmer 5 K 0 25 W SMD 3224X 1 502E R6 R22 2 RES 100 k 5 0 1 W 0603 CRCW0603100KJNEAC R7 R21 2 RES 100 5 0 1 W AEC Q200 Grade 0 0603 CRCW0603100RJNEA R8 R27 2 RES 105 k 1 0 1 W 0603 RC0603FR 07...

Page 26: ...ink section 7 Revised the Mother Boards section 9 Updated Figure 3 1 10 Added Figure 4 2 11 Revised the Test Equipment section 14 Revised the Test Procedure When Paired With LMG342X BB EVM section 15 Revised the Setup section 15 Added the Test Results section 17 Revised the Test Procedure When Paired With LMG34XX BB EVM section 19 Updated Table 9 1 23 Revision History www ti com 26 LMG342XEVM 04X ...

Page 27: ...other than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control techniques are used to the extent TI deems necessary TI does not test all parameters of each EVM User s claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects...

Page 28: ... These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation...

Page 29: ...y for convenience and should be verified by User 1 Use EVMs in a shielded room or any other test facility as defined in the notification 173 issued by Ministry of Internal Affairs and Communications on March 28 2006 based on Sub section 1 1 of Article 6 of the Ministry s Rule for Enforcement of Radio Law of Japan 2 Use EVMs only after User obtains the license of Test Radio Station as provided in R...

Page 30: ... any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees affiliates contractors or designees 4 4 User assumes all...

Page 31: ...OR DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthermore no return of EVM s will be accepted if the package has been opened and no return of the EVM s will be accepted if they are damaged or otherwise not in a resalable condition If User feels it has...

Page 32: ...o change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for and you will fully indemn...

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