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EVM User's Guide: LMR51635EVM
LMR51635 Buck Evaluation Module
Description
The Texas Instruments LMR51635EVM evaluation
module (EVM) helps designers evaluate the operation
and performance of the LMR51635 wide-input
synchronous buck regulator. The LMR51635 is a
wide-V
, easy-to-use synchronous buck converter.
IN
With the wide operating input voltage range of 4.3V
to 60V, the device is designed for a wide range
of industrial applications for power conditioning from
an unregulated source. The LMR51635 operates
at 400kHz switching frequency to support use of
relatively small inductors for an optimized design size.
The LMR51635 supports up to 3.5A continuous output
current.
SLUUCT3 – AUGUST 2024
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Features
•
4.3V to 60V input voltage range
•
Default 5V output
•
3.5A continuous output current capability
•
400kHz switching frequency
•
Hiccup mode short-circuit protection
•
Frequency spread spectrum
Applications
•
Major appliance
•
PLC, DCS, and PAC
•
Smart meters
•
General purposes wide V
LMR51635EVM Top View
Copyright © 2024 Texas Instruments Incorporated
Description
power supplies
IN
LMR51635 Buck Evaluation Module
1
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Table of Contents
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Summary of Contents for Texas Instruments LMR51635
- Page 1 400kHz switching frequency to support use of • PLC, DCS, and PAC relatively small inductors for an optimized design size. • Smart meters The LMR51635 supports up to 3.5A continuous output • General purposes wide V power supplies current. LMR51635EVM Top View SLUUCT3 –...
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Page 2: Specification
6V to 60V 0A to 3.5A This user's guide contains information for the LMR51635 as well as support documentation for the LMR51635EVM evaluation module. This user's guide includes the performance specifications, schematic, and the bill of materials of the LMR51635EVM. -
Page 3: Adjusting The Output Voltage
FB_TOP FB_BOT The value of R and R for a specific output voltage can be calculated using Equation = 0.8 × 1 + SLUUCT3 – AUGUST 2024 LMR51635 Buck Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated... -
Page 4: Test Results
Figure 2-1. LMR51635EVM Output Voltage Ripple, V = 24V, I = 0A Figure 2-2. LMR51635EVM Output Voltage Ripple, V = 24V, I = 3.5A LMR51635 Buck Evaluation Module SLUUCT3 – AUGUST 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated... - Page 5 2.2.3 Start-Up Relative to EN The following figure shows the LMR51635EVM start-up waveform relative to V Figure 2-4. LMR51635EVM Start-Up Relative to EN, I = 3.5A SLUUCT3 – AUGUST 2024 LMR51635 Buck Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
- Page 6 Hardware Design Files www.ti.com 3 Hardware Design Files 3.1 Schematic Figure 3-1 is the schematic for the LMR51635EVM. Figure 3-1. LMR51635EVM Schematic Diagram LMR51635 Buck Evaluation Module SLUUCT3 – AUGUST 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
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Page 7: Pcb Layouts
1oz copper planes are applied on middle layers. Figure 3-2. LMR51635EVM Front Photo Figure 3-3. LMR51635EVM Back Photo Figure 3-4. Top Layer Figure 3-5. Middle Layer 1 SLUUCT3 – AUGUST 2024 LMR51635 Buck Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated... - Page 8 Hardware Design Files www.ti.com Figure 3-6. Middle Layer 2 Figure 3-7. Bottom Layer LMR51635 Buck Evaluation Module SLUUCT3 – AUGUST 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
- Page 9 Test Point, Multipurpose, Yellow, TH 5014 Keystone TP10, TP11 Test Point, Multipurpose, Black, TH 5011 Keystone 55V, 3.5A SIMPLE SWITCHER Synchronous Buck Converter SOT-23-6 LMR51635XDDCR Texas Instruments SLUUCT3 – AUGUST 2024 LMR51635 Buck Evaluation Module Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated...
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Page 10: Texas Instruments
Reference www.ti.com 4 Reference Texas Instruments, LMR51635 4.3V to 60V, 3.5A Synchronous Buck Converter data sheet LMR51635 Buck Evaluation Module SLUUCT3 – AUGUST 2024 Submit Document Feedback Copyright © 2024 Texas Instruments Incorporated... - Page 11 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 12 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 13 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 14 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 15 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 16: 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 © 2024, Texas Instruments Incorporated...
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