Texas Instruments LM5180-Q1 Скачать руководство пользователя страница 19 | Manualshive

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Texas Instruments LM5180-Q1 Скачать руководство пользователя страница 19

Locate the converter IC close

to the transformer and connect

to the GND plane as shown

Place the Y-cap close to the transformer so that common-mode

currents from the secondary to the primary side return in a tight loop

Keep the DZ clamp and RC snubber

components close to the primary winding pins

Keep the secondary

winding, flyback diode

and output capacitor

loop as tight as possible

Place the input capacitor close

to the VIN pin and connect to

the GND plane under the IC

Locate the RSET, TC and FB resistors and

the SS capacitor close to their respective pins

Use adequate heatsinking

copper connected to the

cathode of the flyback

diode (VOUT)

EVM Documentation

19

SNVU592D – July 2018 – Revised April 2020

Submit Documentation Feedback

Copyright © 2018–2020, Texas Instruments Incorporated

LM5180-Q1 Single-Output EVM User's Guide

7.4.1

PCB Layout Tips

Figure 21. Layout Design Tips for a Single-output PSR Flyback Converter

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Содержание LM5180-Q1

Страница 1: ...he EVM design uses the LM5180 Q1 65 V PSR flyback converter An integrated 100 V 1 5 A power MOSFET provides ample margin for line transients and switch SW node voltage spikes related to transformer parasitic leakage inductance Load regulation errors related to transformer secondary winding resistance are avoided by virtue of the quasi resonant boundary conduction mode BCM control scheme Additional...

Страница 2: ... Scale 9 8 SW Node Voltage VIN 24 V IOUT 1 A 10 9 SW Node Voltage VIN 48 V IOUT 1 A 10 10 Load Transient Response VIN 24 V 0 1 A to 1 A at 1 A µs 11 11 Start Up VIN 24 V IOUT 1 A Resistive 11 12 Enable On VIN 24 V IOUT 1 A 12 13 CISPR 25 Class 5 Conducted Emissions Plot VIN 12 V IOUT 0 85 A a 150 kHz to 30 MHz b 30 MHz to 108 MHz 13 14 CISPR 25 Class 5 Conducted Emissions Plot VIN 24 V IOUT 0 85 A...

Страница 3: ...olated output voltage of 5 V with 1 5 load regulation from 1 to 100 load Wide VIN operating range of 10 V to 65 V Rated full load current of 1 A at VIN 24 V Maximum switching frequency of 350 kHz remains below the AM band High efficiency across wide load current range Full load efficiency of 86 and 85 5 at VIN 24 V and 48 V respectively 86 efficiency at half rated load VIN 24 V 1 3 mA and 1 mA no ...

Страница 4: ...4 65 V Input voltage turnon VIN ON Adjusted using EN UVLO divider resistors 9 5 Input voltage turnoff VIN OFF 6 5 Input voltage hysteresis VIN HYS 3 Input current no load IIN NL IOUT 0 A VIN 24 V 1 3 mA VIN 48 V 1 VIN 65 V 1 Input current disabled IIN OFF VEN 0 V VIN 24 V 10 µA OUTPUT CHARACTERISTICS Output voltage VOUT 1 4 95 5 025 5 1 V Output current IOUT 2 VIN 12 V 0 8 A VIN 24 V 1 2 VIN 48 V ...

Страница 5: ... July 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Single Output EVM User s Guide 3 Application Circuit Diagram Figure 1 shows the schematic of an LM5180 PSR 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 for the speci...

Страница 6: ...VOUT Positive output voltage power and sense connection VOUT Negative output voltage power and sense connection EN ENABLE input Tie to GND to disable converter SW SW node connection Referencing the EVM connections described in Table 3 the recommended test setup to evaluate the LM5180EVM S05 is shown in Figure 3 Working at an ESD protected workstation make sure that any wrist straps boot straps or ...

Страница 7: ...st 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 0 1 A maximum Ensure the input source is initially set to 0 V and connected to the VIN and VIN connection points as shown in Figure 3 An additional inp...

Страница 8: ...mentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Single Output EVM User s Guide 6 Test Data and Performance Curves Figure 4 through Figure 11 present typical performance curves for the LM5180EVM S05 Because actual performance data can be affected by measurement techniques and environmental variables these curves are presented for reference and may differ from actual ...

Страница 9: ... 4 8 4 85 4 9 4 95 5 5 05 5 1 5 15 5 2 VIN 12V VIN 24V VIN 36V VIN 48V VIN 65V www ti com Test Data and Performance Curves 9 SNVU592D July 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Single Output EVM User s Guide 6 2 Load Regulation Figure 6 Load Regulation Linear Scale Figure 7 Load Regulation Log Scale ...

Страница 10: ...0 SNVU592D July 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Single Output EVM User s Guide 6 3 Operating Waveforms 6 3 1 Switching Figure 8 SW Node Voltage VIN 24 V IOUT 1 A Figure 9 SW Node Voltage VIN 48 V IOUT 1 A ...

Страница 11: ...entation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Single Output EVM User s Guide 1 The internal soft start timer is applicable here as the SS capacitor was not installed during these start up tests 6 3 2 Load Transient Response Figure 10 Load Transient Response VIN 24 V 0 1 A to 1 A at 1 A µs 6 3 3 Start Up 1 Figure 11 Start Up VIN 24 V IOUT 1 A Resistive ...

Страница 12: ...Data and Performance Curves www ti com 12 SNVU592D July 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Single Output EVM User s Guide 6 4 Enable On Figure 12 Enable On VIN 24 V IOUT 1 A ...

Страница 13: ...ng 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 respectively Figure 13 CISPR 25 Class 5 Conducted Emissions Plot VIN 12 V IOUT 0 85 A a 150 kHz to 30 MHz b 30 MHz to 108 MHz Figure 14 CISPR 25 Class 5 Conducted Emissions Plot VIN 24 V IOUT 0 85 A a 150 k...

Страница 14: ...ves www ti com 14 SNVU592D July 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Single Output EVM User s Guide For both conducted and radiated emissions measurements the transformer core is shielded using a copper strap tied to primary GND Figure 15 CISPR 25 Class 5 Radiated Emissions Plot VIN 13 5 V IOUT 0 5 A ...

Страница 15: ... VIN 3 EN UVLO 4 SS BIAS 5 TC 6 RSET 7 GND 8 PAD 9 LM5180QNGURQ1 U1 6 3V 220µF C11 DNP TP3 SS BIAS 22pF C10 10Vt65VDC 5VDC 1A J3 J1 1 4 NC 2 NC 3 7 8 5 6 T1 YA8779 BL Copyright 2018 Texas Instruments Incorporated www ti com EVM Documentation 15 SNVU592D July 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Single Output EVM User s G...

Страница 16: ...LZ24 7 Diodes Inc Zener 24 V 1 W SOD 123 DFLZ24 TP Micro Commercial 1 D2 Schottky diode 40 V 3 A SMA AEC Q101 FSV340AF Onsemi 1 D3 Zener diode 5 6 V SOD 523 BZT52C5V6T 7 Diodes Inc 1 D4 Switching diode 75 V 0 25 A SOD 123 CMDD4448 Central Semi 4 H1 H2 H3 H4 Machine Screw Round 4 40 x 1 4 Nylon Philips Panhead NY PMS 440 0025 PH B F Fastener Supply 4 H5 H6 H7 H8 Standoff Hex 0 5 L 4 40 Nylon 1902C ...

Страница 17: ...20 Texas Instruments Incorporated LM5180 Q1 Single Output EVM User s Guide 7 3 PCB Layout Figure 17 through Figure 20 show the design of a 2 layer PCB with 1 oz copper thickness The EVM is a two sided design with post connections for VIN VIN VOUT and VOUT Figure 17 Top Copper Top View Figure 18 Bottom Copper Top View ...

Страница 18: ...D July 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020 Texas Instruments Incorporated LM5180 Q1 Single Output EVM User s Guide 7 4 Assembly Drawings Figure 19 Top Component Drawing Figure 20 Bottom Component Drawing ...

Страница 19: ...as tight as possible Place the input capacitor close to the VIN pin and connect to the GND plane under the IC Locate the RSET TC and FB resistors and the SS capacitor close to their respective pins Use adequate heatsinking copper connected to the cathode of the flyback diode VOUT www ti com EVM Documentation 19 SNVU592D July 2018 Revised April 2020 Submit Documentation Feedback Copyright 2018 2020...

Страница 20: ...804 PSR Flyback Transformer Design for mHEV Applications SNVA805 How an Auxless PSR Flyback Converter can Increase PLC Reliability and Density SLYT779 Why Use PSR Flyback Isolated Converters in Dual Battery mHEV Systems SLYT791 TI Designs Isolated IGBT Gate Drive Power Supply Reference Design With Integrated Switch PSR Flyback Controller Compact Efficient 24 V Input Auxiliary Power Supply Referenc...

Страница 21: ...wer Supplies SNVA021 AN 1229 Simple Switcher PCB Layout Guidelines SNVA054 Constructing Your Power 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...

Страница 22: ... 19 Updated list of collateral in Section 8 20 Changes from B Revision February 2019 to C Revision Page Changed delivers an output voltage with 1 regulation to delivers an output voltage with 1 5 regulation 1 Changed 1 load regulation to 1 5 load regulation 3 Changed Soft start time tSS from 5 ms to 8 ms 4 Changed VIN 24 V IOUT 0 85 A a 150 kHz to 30 MHz b 30 MHz to 108 MHz to VIN 13 5 V IOUT 0 5 ...

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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