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User's Guide
LM5168FEVM EVM User's Guide
The LM5168FEVM is a 115-V DC/DC fly-buck regulator that employs synchronous rectification to achieve high
conversion efficiency in a small footprint. The EVM operates over a wide input voltage range of 20 V to 115
V (120-V absolute maximum) to provide a regulated 10-V output at up to 0.25 A with a 750-kHz switching
frequency. An additional 10-V floating output is provided through the fly-buck topology. The output voltage has
better than 1.5% set-point accuracy and is adjustable using an external resistor divider. The module design
uses the LM5168F-Q1 synchronous buck converter with wide input voltage range, wide duty-cycle range,
integrated high-side and low-side power MOSFETs, advanced overcurrent protection, and precision enable. With
AEC-Q100 grade 1 automotive qualification, the LM5168F-Q1 is rated to operate over a junction temperature
range of -40°C to +150°C.
EVM
LM5168FEVM
1 General TI High Voltage Evaluation User Safety Guidelines..............................................................................................
2 EVM Characteristics...............................................................................................................................................................
Procedure........................................................................................................................................................6
3.2 Detailed Descriptions.........................................................................................................................................................
4
Schematic................................................................................................................................................................................8
Layout..............................................................................................................................................................................9
Materials......................................................................................................................................................................11
Curves.............................................................................................................................................................13
Figure 3-1. LM5168FEVM Top View............................................................................................................................................
SNVU819 - NOVEMBER 2021
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ABSTRACT
Table 1-1. EVM Configuration
CONVERTER IC
LM5168F-Q1
8-pin SO package with PowerPAD (4.89 mm × 3.90 mm)
Table of Contents
Module..........................................................................................................................................6
List of Figures
Copyright © 2021 Texas Instruments Incorporated
PACKAGE
LM5168FEVM EVM User's Guide
Table of Contents
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Summary of Contents for Texas Instruments LM5168FEVM
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Page 1: Table Of Contents
LM5168FEVM EVM User's Guide ABSTRACT The LM5168FEVM is a 115-V DC/DC fly-buck regulator that employs synchronous rectification to achieve high conversion efficiency in a small footprint. The EVM operates over a wide input voltage range of 20 V to 115 V (120-V absolute maximum) to provide a regulated 10-V output at up to 0.25 A with a 750-kHz switching... - Page 2 Figure 7-6. Typical Shutdown Waveform........................... List of Tables Table 1-1. EVM Configuration..............................1 Table 2-1. LM5168FQEVM Electrical Performance Characteristics.................... Table 6-1. LM5168FEVM Bill of Materials ..........................Trademarks PowerPAD ™ is a trademark of Texas Instruments. All trademarks are the property of their respective owners.
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Page 3: General Ti High Voltage Evaluation User Safety Guidelines
WARNING: While the EVM is energized, never touch the EVM or its electrical circuits as they could be at high voltages capable of causing electrical shock hazard. SNVU819 – NOVEMBER 2021 LM5168FEVM EVM User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... - Page 4 High Voltage! Electric shock is possible when connecting board to live wire. Board should be handled with care by a professional. For safety, use of isolated test equipment with overvoltage and overcurrent protection is highly recommended. LM5168FEVM EVM User's Guide SNVU819 – NOVEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated...
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Page 5: Evm Characteristics
Half-load efficiency = 0.08 A = 48 V OUT1 OUT2 = 48 V Full load efficiency = 0.125 A OUT1 OUT2 = 60 V SNVU819 – NOVEMBER 2021 LM5168FEVM EVM User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 6: Lm5168Fevm Evaluation Module
This type of control requires adequate voltage ripple at the FB input to achieve stable regulation. The LM5168FEVM is set up with type III ripple injection to minimize the output voltage ripple while ensuring a stable regulator. The LM5168FEVM also provides the option to use type I or type II ripple injection. -
Page 7: Detailed Descriptions
LM5168FEVM Evaluation Module 3.2 Detailed Descriptions This section describes the connectors and the test points on the EVM and how to properly connect, set up, and use the LM5168FEVM EVM. See Figure 3-1 for location of connectors and jumpers. VOUT Output voltage of the converter VOUT screw terminal connector. -
Page 8: Schematic
Schematic www.ti.com 4 Schematic Figure 4-1. LM5168FEVM Schematic LM5168FEVM EVM User's Guide SNVU819 – NOVEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 9: Pcb Layout
5 PCB Layout Figure 5-1 through Figure 5-4 show the board layout for the LM5168FEVM. The 8-pin SO PowerPAD ™ package offers an exposed thermal pad, which must be soldered to the copper landing on the PCB for optimal thermal performance. The PCB consists of a 4-layer design. There are 2-oz copper planes on the top and bottom and 1-oz copper mid-layer planes to dissipate heat with an array of thermal vias under the thermal pad to connect to all four layers. -
Page 10: Figure 5-3. Mid-Layer 2 Routing
PCB Layout www.ti.com Figure 5-3. Mid-Layer 2 Routing Figure 5-4. Bottom Layer LM5168FEVM EVM User's Guide SNVU819 – NOVEMBER 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... -
Page 11: Bill Of Materials
Bill of Materials 6 Bill of Materials Table 6-1. LM5168FEVM Bill of Materials DESIGNATOR QUANTITY DESCRIPTION PART NUMBER MANUFACTURER CAP, CERM, 0.1 μF, 250 V, ±10%, X7T, C2012X7T2E104K125AA 0805 CAP, CERM, 2200 pF, 50 V, ±10%, GCM155R71H222KA37D MuRata X7R, AEC-Q200 Grade 1, 0402 CAP, CERM, 3300 pF, 100 V, ±10%,... - Page 12 Bill of Materials www.ti.com Table 6-1. LM5168FEVM Bill of Materials (continued) DESIGNATOR QUANTITY DESCRIPTION PART NUMBER MANUFACTURER Header, 100 mil, 3 × 1, Gold, TH HTSW-103-07-G-S Samtec Inductor, Shielded Drum Core, Ferrite, MSS7341T-153MLB Coilcraft 15 μH, 1.8 A, 0.05 Ω, AEC-Q200 Grade 1, SMD RES, 1.0, 5%, 0.1 W, AEC-Q200 Grade...
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Page 13: Performance Curves
= 48 V = 100 mA = 48 V = 100 mA OUT2 OUT2 Figure 7-5. Typical Start-Up Waveform Figure 7-6. Typical Shutdown Waveform SNVU819 – NOVEMBER 2021 LM5168FEVM EVM User's Guide Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated... - Page 14 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 15 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 16 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 17 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 18 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 19 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 © 2021, Texas Instruments Incorporated...
- Page 20 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments LM5168FEVM...
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