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Texas Instruments LM25180-Q1 Скачать руководство пользователя страница 19

Locate the converter IC close 

to the transformer and connect 

to the GND plane as shown

Minimize the area of the 

secondary winding, 

flyback diode and output 

capacitor switching loops

Place the ceramic input 

capacitor close to the IC to 

minimize the switching loop area

Place the RSET, TC, FB and SS small-signal 

components near their respective pins

Maintain the appropriate primary-

to-secondary clearance distance

www.ti.com

EVM Documentation

19

SNVU609B – October 2018 – Revised April 2020

Submit Documentation Feedback

Copyright © 2018–2020, Texas Instruments Incorporated

LM5180-Q1 Dual-Output EVM User's Guide

7.4.1

PCB Layout Tips

Figure 22. Layout Design Tips for a Dual-output PSR Flyback Converter

Содержание LM25180-Q1

Страница 1: ...verter provides an output voltage with better than 2 load regulation The flyback transformer has a turns ratio of 1 1 0 52 PRI SEC1 SEC2 and provides 1500 VRMS primary to secondary isolation The EVM design uses the LM5180 Q1 PSR flyback converter with wide input voltage wide VIN range An integrated 100 V 1 5 A power MOSFET provides ample margin for line transients and switch SW node voltage spikes...

Страница 2: ...d Outputs Loaded Symmetrically 9 8 SW Node Voltage IOUT1 IOUT2 200 mA VIN 24 V 10 9 SW Node Voltage IOUT1 IOUT2 200 mA VIN 48 V 10 10 Flyback Diode Voltages IOUT1 IOUT2 200 mA VIN 24 V 11 11 Flyback Diode Voltages IOUT1 IOUT2 200 mA VIN 48 V 11 12 Output 1 Load Transient 50 mA to 200 mA at 100mA µs IOUT2 200 mA VIN 24 V 12 13 Output 2 Load Transient 50 mA to 200 mA at 100mA µs IOUT1 200 mA VIN 24 ...

Страница 3: ...nge of 10 V to 65 V Full load current of 200 mA both outputs Maximum switching frequency of 350 kHz remains below the AM band for automotive applications High efficiency across wide load current range Full load efficiency of 88 and 87 5 at VIN 24 V and 48 V respectively 88 5 efficiency at half rated load VIN 24 V 1 4 mA and 1 1 mA no load supply current at VIN 24 V and 48 V respectively Ultra low ...

Страница 4: ...oltage turnoff VIN OFF 7 Input voltage hysteresis VIN HYS 2 Input current no load IIN NL IOUT1 IOUT2 0 mA VIN 24 V 1 4 mA VIN 48 V 1 1 VIN 65 V 1 Input current disabled IIN OFF VEN 0 V VIN 24 V 10 µA OUTPUT CHARACTERISTICS Output voltage VOUT1 1 IOUT1 2 5 mA to 200 mA 14 7 15 0 15 3 V Output voltage VOUT2 1 7 5 7 7 7 9 V Output current IOUT1 IOUT2 2 VIN 12 V 0 180 mA VIN 24 V 0 220 VIN 48 V 0 300 ...

Страница 5: ...April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Dual Output EVM User s Guide 3 Application Circuit Diagram Figure 1 shows the schematic of an LM5180 based flyback converter EMI filter stage not shown Soft start SS temperature compensation TC and UVLO EN UVLO components are shown that are configurable as required by the specific application The ...

Страница 6: ...ut 1 power and sense connection VOUT2 Output 2 power and sense connection S GND Output return and sense connection EN ENABLE input tie to GND to disable converter SS BIAS External BIAS input SW SW node connection Referencing the EVM connections described in Table 3 the recommended test setup to evaluate the LM5180EVM DUAL is shown in Figure 3 Working at an ESD protected workstation make sure that ...

Страница 7: ...easure other waveforms adjust the oscilloscope as needed Safety Always use caution when touching any circuits that may be live or energized 5 3 Recommended Test Setup 5 3 1 Input Connections Prior to connecting the DC input source set the current limit of the input supply to 100 mA maximum Ensure the input source is initially set to 0 V and connected to the VIN and VIN connection points as shown i...

Страница 8: ...ht 2018 2020 Texas Instruments Incorporated LM5180 Q1 Dual Output EVM User s Guide 6 Test Data and Performance Curves Figure 4 through Figure 16 present typical performance curves for the LM5180EVM DUAL Because actual performance data can be affected by measurement techniques and environmental variables these curves are presented for reference and can differ from actual field measurements 6 1 Effi...

Страница 9: ...IN 24V VIN 36V VIN 48V VIN 65V www ti com Test Data and Performance Curves 9 SNVU609B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Dual Output EVM User s Guide Figure 6 Load Regulation Linear Scale Sum of VOUT1 and VOUT2 Measured Outputs Loaded Symmetrically Figure 7 Load Regulation Log Scale Sum of VOUT1 and VOUT2 Measu...

Страница 10: ...October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Dual Output EVM User s Guide 6 2 Operating Waveforms 6 2 1 Switching Figure 8 SW Node Voltage IOUT1 IOUT2 200 mA VIN 24 V Figure 9 SW Node Voltage IOUT1 IOUT2 200 mA VIN 48 V ...

Страница 11: ...Performance Curves 11 SNVU609B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Dual Output EVM User s Guide Figure 10 Flyback Diode Voltages IOUT1 IOUT2 200 mA VIN 24 V Figure 11 Flyback Diode Voltages IOUT1 IOUT2 200 mA VIN 48 V ...

Страница 12: ...s www ti com 12 SNVU609B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Dual Output EVM User s Guide 6 2 2 Load Transient Response Figure 12 Output 1 Load Transient 50 mA to 200 mA at 100mA µs IOUT2 200 mA VIN 24 V Figure 13 Output 2 Load Transient 50 mA to 200 mA at 100mA µs IOUT1 200 mA VIN 24 V ...

Страница 13: ...ril 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Dual Output EVM User s Guide 1 The internal soft start timer is applicable here as the SS cap was not installed during these startup tests 6 2 3 Start Up Enable and Short Circuit Recovery 1 Figure 14 Start Up VIN 24 V IOUT1 IOUT2 200 mA Resistive Figure 15 Enable On VIN 24 V IOUT1 IOUT2 200 mA Resis...

Страница 14: ... Data and Performance Curves www ti com 14 SNVU609B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Dual Output EVM User s Guide Figure 16 Short Circuit Recovery VIN 24 V IOUT1 IOUT2 200 mA Resistive ...

Страница 15: ...RQ1 U1 200V D1 DFLU1200 7 250V 22pF C1 100 R1 25V 10uF C9 25V 10uF C2 15V 200mA 7 7V 200mA VOUT1 S GND VOUT2 25V 10uF C3 25V 10uF C10 SS BIAS D5 BZT52C18T 7 8 2V D6 BZT52C8V2T 7 25V 33uF C4 25V 33uF C11 10uH L2 7 8 5 6 1 4 NC 2 NC 3 T1 YA8916 BL Copyright 2018 Texas Instruments Incorporated N A N A N A www ti com EVM Documentation 15 SNVU609B October 2018 Revised April 2020 Submit Documentation Fe...

Страница 16: ...47 nF 16 V X7R 0603 Std Std 1 D1 Switching Diode 200 V 1 A SOD 123 DFLU1200 7 Diodes Inc 1 D2 Zener 24 V 1 W PowerDI 123 AEC Q101 DFLZ24 7 Diodes Inc Zener 24 V 1 W SOD 123 DFLZ24 TP Micro Commercial 1 D3 Schottky Diode 100 V 1 A SOD 123 DFLS1100 7 Diodes Inc 1 D4 Switching Diode 100 V 1 A SOD 323 CMDD4448 Central Semi 1 D5 Zener 18 V SOD 523 BZT52C18VT 7 Diodes Inc 1 D6 Zener 8 2 V SOD 523 BZT52C...

Страница 17: ...xas Instruments Incorporated LM5180 Q1 Dual Output EVM User s Guide 7 3 PCB Layout Figure 18 through Figure 21 show the design of the LM5180 2 layer PCB with 1 oz copper thickness The EVM is a two sided design with post connections for VIN VIN VOUT1 VOUT2 and SGND Figure 18 Top Copper Top View Figure 19 Bottom Copper Top View ...

Страница 18: ... SNVU609B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Dual Output EVM User s Guide 7 4 Assembly Drawings Figure 20 Top Assembly Figure 21 Bottom Assembly ...

Страница 19: ... switching loop area Place the RSET TC FB and SS small signal components near their respective pins Maintain the appropriate primary to secondary clearance distance www ti com EVM Documentation 19 SNVU609B October 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Dual Output EVM User s Guide 7 4 1 PCB Layout Tips Figure 22 Layout Des...

Страница 20: ...Supply Reference Design With Integrated Switch PSR Flyback Controller Compact Efficient 24 V Input Auxiliary Power Supply Reference Design for Servo Drives Reference Design for Power Isolated Ultra Compact Analog Output Module HEV EV Traction Inverter Power Stage with 3 Types of IGBT SiC Bias Supply Solutions Reference Design 4 5 V to 65 V Input Compact Bias Supply With Power Stage Reference Desig...

Страница 21: ...wer Supply Layout Considerations SLUP230 Low Radiated EMI Layout Made SIMPLE with LM4360x and LM4600x SNVA721 TI Technical Articles High Density PCB Layout of DC DC Converters 8 2 1 2 Thermal Design Resources AN 2020 Thermal Design by Insight Not Hindsight SNVA419 AN 1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Pad Packages SNVA183 Semiconductor and IC Package Thermal Metri...

Страница 22: ...y differ from page numbers in the current version Changes from A Revision April 2019 to B Revision Page Added family of PSR flyback converters in Table 1 1 Updated Section 1 1 3 Added PCB layout tips in Section 7 4 19 Updated list of collateral in Section 8 20 Changes from Original October 2018 to A Revision Page Changed soft start time tSS from 4 ms to 8 ms 4 Changed part number for T1 Würth Elec...

Страница 23: ...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...

Страница 24: ... 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...

Страница 25: ...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...

Страница 26: ... 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...

Страница 27: ...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...

Страница 28: ...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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