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CAUTION

Caution Hot surface.
Contact may cause burns.
Do not touch.

EVM Photo

7

SNVU623B – October 2018 – Revised April 2020

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Copyright © 2018–2020, Texas Instruments Incorporated

LM5143-Q1 EVM User's Guide

4

EVM Photo

Figure 3. LM5143-Q1 EVM, 100 mm × 75 mm

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Summary of Contents for LM25141-Q1

Page 1: ...iding regulated outputs of 5 V and 3 3 V The output voltages have better than 1 setpoint accuracy and are adjustable by modifying the feedback resistor values permitting the user to customize the output voltage from 2 5 V to 8 V as needed The module design uses the LM5143 Q1 synchronous buck controller with the following features Wide input voltage wide VIN range of 3 5 V to 65 V Wide duty cycle r...

Page 2: ... Channel Efficiency VIN 12 V VOUT1 3 3 V VOUT2 5 V 10 6 Ch1 Efficiency VIN 12 V VOUT1 3 3 V FPWM Channel 2 OFF 11 7 Ch1 Efficiency VIN 12 V VOUT1 3 3 V Diode Emulation Channel 2 OFF Log Scale 11 8 Ch2 Efficiency VIN 12 V VOUT2 5 V FPWM Channel 1 OFF 12 9 Ch2 Efficiency VIN 12 V VOUT2 5 V Diode Emulation Channel 1 OFF Log Scale 12 10 Two Phase Regulator Efficiency VOUT 5 V FPWM 13 11 Two Phase Regu...

Page 3: ...Top View 24 28 Layer 2 Copper Top View 24 29 Layer 3 Copper Top View 25 30 Layer 4 Copper Top View 25 31 Layer 5 Copper Top View 26 32 Bottom Copper Top View 26 33 Top Component Drawing 27 34 Bottom Component Drawing 27 List of Tables 1 Automotive Synchronous Buck DC DC Controller Family 1 2 Electrical Performance Characteristics 5 3 EVM Power Connections 8 4 EVM Signal Connections 9 5 Bill of Mat...

Page 4: ...utput configurations Dual outputs of 3 3 V and 5 V rated at 7 A each Single output two phase solution provides 15 A Switching frequency of 2 1 MHz externally synchronizable up or down by 20 Ultra high power conversion efficiency across wide load current ranges Full load efficiency of 90 25 at VIN 12 V dual outputs of 5 V and 3 3 V at 7 A Full load efficiency of 91 5 at VIN 12 V single output of 5 ...

Page 5: ...UT2 0 A MODE tied to AGND VIN 12 V 50 µA VIN 24 V 50 VIN 36 V 50 Input current disabled IIN OFF VEN1 VEN2 0 V VIN 12 V 4 µA OUTPUT CHARACTERISTICS Output voltage VOUT1 1 FB1 tied to VDDA 3 27 3 3 3 33 V Output voltage VOUT2 1 FB2 tied to AGND 4 95 5 0 5 05 Output current IOUT1 2 VIN 5 5 V to 36 V Airflow 100 LFM 2 0 7 A Output voltage regulation ΔVOUT1 2 Load regulation IOUT1 2 0 A to 7 A 0 5 Line...

Page 6: ...T2 CIN CSS1 CC3 CSS2 CRES CVDD CC2 RC1 CC1 LO2 COUT1 RS2 RS1 QL1 QH1 QL2 QH2 RHO2 RHO1 CDITH DITH RRT VDDA Copyright 2018 Texas Instruments Incorporated Application Circuit Diagram www ti com 6 SNVU623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide 3 Application Circuit Diagram Figure 1 shows the schemati...

Page 7: ...ause burns Do not touch www ti com EVM Photo 7 SNVU623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide 4 EVM Photo Figure 3 LM5143 Q1 EVM 100 mm 75 mm ...

Page 8: ...g at an ESD protected workstation make sure that any wrist straps boot straps or mats are connected and referencing the user to earth ground before handling the EVM Figure 4 EVM Test Setup CAUTION Refer to the LM5143 Q1 data sheet LM5143 Q1 Quickstart Calculator and WEBENCH Power Designer for additional guidance pertaining to component selection and controller operation Table 3 EVM Power Connectio...

Page 9: ...t Oscilloscope With the scope set to 20 MHz bandwidth and AC coupling measure the output voltage ripple directly across an output capacitor with a short ground lead normally provided with the scope probe Place the oscilloscope probe tip on the positive terminal of the output capacitor holding the ground barrel of the probe through the ground lead to the negative terminal of the capacitor TI does n...

Page 10: ...regulation specification Using voltmeter 3 to measure the output voltage VOUT2 vary the load current from 0 A to 7 A DC VOUT2 should remain within the load regulation specification Set the load currents to 3 5 A 50 rated load and vary the input source voltage from 5 5 V to 36 V VOUT1 and VOUT2 must remain within the line regulation specification Decrease load to 0 A Decrease input source voltage t...

Page 11: ...IN 8V VIN 12V VIN 18V www ti com Test Data and Performance Curves 11 SNVU623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide Figure 6 Ch1 Efficiency VIN 12 V VOUT1 3 3 V FPWM Channel 2 OFF Figure 7 Ch1 Efficiency VIN 12 V VOUT1 3 3 V Diode Emulation Channel 2 OFF Log Scale ...

Page 12: ... VIN 8V VIN 12V VIN 18V Test Data and Performance Curves www ti com 12 SNVU623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide Figure 8 Ch2 Efficiency VIN 12 V VOUT2 5 V FPWM Channel 1 OFF Figure 9 Ch2 Efficiency VIN 12 V VOUT2 5 V Diode Emulation Channel 1 OFF Log Scale ...

Page 13: ...VU623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide Implement a two phase circuit by connecting the outputs together and changing the switch positions to connect SS1 to SS2 COMP1 to COMP2 and MODE to VDDA Also tie FB2 to AGND Figure 10 Two Phase Regulator Efficiency VOUT 5 V FPWM Figure 11 Two Phase Regu...

Page 14: ... ti com 14 SNVU623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide 6 2 Operating Waveforms 6 2 1 Switching Figure 12 SW Node Voltages VIN 12 V IOUT1 IOUT2 7 A Figure 13 SW Node Voltages VIN 8 V IOUT1 IOUT2 7 A ...

Page 15: ...3B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide 6 2 2 Load Transient Response Figure 14 Ch1 3 3 V Load Transient Response VIN 12 V FPWM 0 A to 7 A at 1 A µs Figure 15 Ch1 3 3 V Load Transient Response VIN 12 V FPWM 3 5 A to 7 A at 1 A µs ...

Page 16: ... ti com 16 SNVU623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide Figure 16 Ch2 5 V Load Transient Response VIN 12 V FPWM 0 A to 7 A at 1 A µs Figure 17 Ch2 5 V Load Transient Response VIN 12 V FPWM 3 5 A to 7 A at 1 A µs ...

Page 17: ...623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide 6 2 3 Line Transient Response Figure 18 Cold crank Response to VIN 3 8 V IOUT1 IOUT2 1 A 6 2 4 Startup Shutdown With ENABLE ON OFF Figure 19 ENABLE ON and OFF VIN 12 V IOUT1 IOUT2 7 A Resistive CSS1 CSS2 68 nF ...

Page 18: ...Curves www ti com 18 SNVU623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide 6 2 5 Startup Shutdown with EN1 and EN2 Tied to VIN Figure 20 Startup VIN 12 V IOUT1 IOUT2 7 A Resistive CSS1 CSS2 68 nF Figure 21 Shutdown VIN 12 V IOUT1 IOUT2 7 A Resistive ...

Page 19: ...U623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide 6 3 Bode Plots Figure 22 Bode Plot VIN 12 V VOUT1 3 3 V IOUT1 7 A Resistive Figure 23 Bode Plot VIN 12 V VOUT2 5 V IOUT2 7 A Resistive ...

Page 20: ...5 CISPR 25 EMI Performance Figure 25 presents the EMI performance of the LM5143 Q1 EVM at 13 5 V input and shields installed Conducted emissions are measured over a frequency range of 150 kHz to 108 MHz using a 5 µH LISN according to the CISPR 25 specification CISPR 25 class 5 peak and average limit lines are denoted in red The yellow and blue spectra are measured using peak and average detection ...

Page 21: ...8 1 2 3 5 6 Q4 IPC50N04S5L5R5ATMA1 FB1 EN1 PG1 PGND VIN 10uF C24 10uF C25 10uF C26 PGND 0 R5 0 R3 4 7 8 1 2 3 5 6 Q1 IPC50N04S5L5R5ATMA1 0 R13 4 7 8 1 2 3 5 6 Q3 IPC50N04S5L5R5ATMA1 PGND VIN INPUT 3 5 36 0VDC 0 1uF C4 10uF C5 6 8µH L1 47uF C1 1 0 R2 10uF C6 10uF C7 1 J1 1 2 3 4 T1 0 1uF C3 0 R11 49 9 R12 33pF C44 680nH L4 0 007 R7 100 R18 DNP 100 R17 DNP0 1uF C29 DNP 1 50k R9 DNP PGND VOUT1 47uF C...

Page 22: ... 0 C45 C46 Capacitor Tant Polymer 220 μF 10 V 7343 25 mΩ ESR AEC Q200 T598D227M010ATE025 Kemet 2 D1 D2 Schottky Diode 60 V 1 A SOD 323 PMEG6010CEJ Nexperia 0 H1 H2 Surface Mount Shield 38 1 25 4 mm Height 6 mm BMI S 205 F Laird 0 H7 H8 Shield Cover 38 56 25 86 mm BMI S 205 C Laird 1 J1 Test Point Slotted 0 118 TH 1040 Keystone 1 J2 Header 2 54 mm 12 1 Au TH PBC12SABN Sullins 1 L1 Inductor 4 2 µH 7...

Page 23: ... Materials continued COUNT REF DES DESCRIPTION PART NUMBER MFR 1 T1 Common mode Choke 700 Ω at 100 MHz 6 mΩ 8 A AEC Q200 ACM12V 701 2PL TL00 TDK 6 TP1 TP2 TP5 TP6 TP7 TP8 Terminal Turret TH Triple 1598 2 Keystone 4 TP3 TP4 TP9 TP10 Test Point Miniature SMT 5015 Keystone 1 U1 IC LM5143 Q1 65 V Dual Synchronous Buck Controller VQFN 40 LM5143QRGWRQ1 TI 1 PCB1 PCB FR4 6 layer 2 oz 100 mm x 75 mm PCB ...

Page 24: ...d LM5143 Q1 EVM User s Guide 7 3 PCB Layout Figure 27 through Figure 34 show the design of the LM5143 Q1 EVM using a 6 layer PCB with 2 oz copper thickness The EVM is essentially a single sided design except for certain input filtering and small signal components located on the bottom side Figure 27 Top Copper Top View Figure 28 Layer 2 Copper Top View ...

Page 25: ...ation 25 SNVU623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide Figure 29 Layer 3 Copper Top View Figure 30 Layer 4 Copper Top View ...

Page 26: ...i com 26 SNVU623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide Figure 31 Layer 5 Copper Top View Figure 32 Bottom Copper Top View ...

Page 27: ...VU623B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5143 Q1 EVM User s Guide 7 4 Component Drawings Figure 33 Top Component Drawing Figure 34 Bottom Component Drawing ...

Page 28: ...s SLYT682 AN 2162 Simple Success with Conducted EMI from DC DC Converters SNVA489 White Papers Valuing Wide VIN Low EMI Synchronous Buck Circuits for Cost driven Demanding Applications SLYY104 An Overview of Conducted EMI Specifications for Power Supplies SLYY136 An Overview of Radiated EMI Specifications for Power Supplies SLYY142 8 2 1 1 PCB Layout Resources AN 1149 Layout Guidelines for Switchi...

Page 29: ...s for previous revisions may differ from page numbers in the current version Changes from A Revision April 2019 to B Revision Page Added Table 1 1 Added low IQ and multi phase capability feature bullets in the Introduction 1 Updated Section 8 28 Changes from Original October 2018 to A Revision Page Added SW node voltage waveform 14 Added EMI results 20 Changed input capacitor C2 in schematic and B...

Page 30: ...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 31: ... 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 32: ...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 33: ... 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 34: ...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 35: ...se resources are subject to 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...

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