Texas Instruments LM5181-Q1 User Manual

Texas Instruments LM5181-Q1 User Manual

Dual-output evm

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With input voltage range and current capability as specified in
converters from TI provides flexibility, scalability, and optimized solution size for a range of applications.
Using an 8-pin WSON package with 4-mm × 4-mm footprint and 0.8-mm pin pitch, these converters
enable isolated DC/DC solutions with high density and low component count.
PSR FLYBACK
INPUT VOLTAGE
CONVERTER
RANGE
LM5181-Q1
4.5 V to 65 V
LM5180-Q1
4.5 V to 65 V
LM25180-Q1
4.5 V to 42 V
LM25183-Q1
4.5 V to 42 V
LM25184-Q1
4.5 V to 42 V
The
LM5180EVM-DUAL
regulation (PSR) based on sampling of the primary winding voltage of the transformer to achieve high
conversion efficiency in a small footprint. It operates over a wide input voltage range of 10 V to 65 V and
delivers dual isolated outputs of 15 V and –7.7 V at 200-mA rated load current. Operating without an
optocoupler or transformer auxiliary winding, the converter 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
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 features includes current-mode control with internal compensation, hiccup-mode fault
protection, low input quiescent current, programmable soft-start, and optional output voltage temperature
compensation. UVLO protects the converter at low input voltage conditions, and the EN/UVLO pin
supports adjustable input UVLO with user-defined hysteresis for application specific power-up and power-
down requirements.
The LM5180 and LM5180-Q1 are available in a 8-pin WSON package with 4-mm × 4-mm footprint and
0.8-mm pin pitch to enable isolated DC/DC solutions with high density and low component count. Wettable
flank pins provide a visual indicator of solderability, which reduces the inspection time and manufacturing
costs in high-reliability industrial and automotive applications. See the
data sheets for more information.
Use the LM5180-Q1 with
the user can download the
predicted efficiency performance across line and load ranges.
SNVU609B – October 2018 – Revised April 2020
Submit Documentation Feedback
LM5180-Q1 Dual-Output EVM User's Guide
Table 1. PSR Flyback DC/DC Converter Family
PEAK SWITCH
CURRENT (TYP)
0.75 A
1.5 A
1.5 A
2.5 A
4.1 A
evaluation module (EVM) is a flyback DC/DC converter that employs primary-side
LM5180-Q1
PSR flyback converter with wide input voltage (wide V
WEBENCH
Power Designer
®
LM5180 Quickstart Calculator
Copyright © 2018–2020, Texas Instruments Incorporated
SNVU609B – October 2018 – Revised April 2020
Table
1, the family of PSR flyback DC/DC
MAXIMUM LOAD CURRENT, V
V
= 4.5 V
V
= 13.5 V
IN
IN
90 mA
180 mA
180 mA
360 mA
180 mA
360 mA
300 mA
600 mA
500 mA
1 A
LM5180
to create a custom regulator design. Furthermore,
to optimize component selection and examine
LM5180-Q1 Dual-Output EVM User's Guide
User's Guide
= 12 V, N
= 1
OUT
PS
V
= 24 V
IN
225 mA
450 mA
450 mA
750 mA
1.25 A
) range. An
IN
and
LM5180-Q1
device
1

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Summary of Contents for Texas Instruments LM5181-Q1

  • Page 1 LM5180 Quickstart Calculator to optimize component selection and examine predicted efficiency performance across line and load ranges. SNVU609B – October 2018 – Revised April 2020 LM5180-Q1 Dual-Output EVM User's Guide Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 2: Table Of Contents

    EVM Connections ......................Bill of Materials Trademarks WEBENCH is a registered trademark of Texas Instruments. All other trademarks are the property of their respective owners. LM5180-Q1 Dual-Output EVM User's Guide SNVU609B – October 2018 – Revised April 2020 Submit Documentation Feedback...
  • Page 3: High Density Evm Description

    Low transformer primary-to-secondary (interwinding) capacitance to accommodate high dv/dt secondary-side common-mode swings • Fully assembled, tested, and proven PCB layout with 55-mm × 38-mm total footprint SNVU609B – October 2018 – Revised April 2020 LM5180-Q1 Dual-Output EVM User's Guide Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 4: Evm Performance Characteristics

    The output power delivered by the LM5180-Q1 PSR flyback converter increases with input voltage. The selected transformer provides functional isolation. LM5180-Q1 Dual-Output EVM User's Guide SNVU609B – October 2018 – Revised April 2020 Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 5: Application Circuit Diagram

    SS/BIAS 301 k: 12.1 k: 47 nF Copyright © 2018, Texas Instruments Incorporated Figure 1. LM5180 PSR Flyback Dual-Output Schematic EVM Photo Figure 2. Dual-Output EVM Photo, 55 mm × 38 mm SNVU609B – October 2018 – Revised April 2020...
  • Page 6: Test Setup And Procedure

    LM5180 Quickstart Calculator, and WEBENCH® Power Designer for additional guidance pertaining to component selection and converter operation. LM5180-Q1 Dual-Output EVM User's Guide SNVU609B – October 2018 – Revised April 2020 Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 7 OUT1 OUT2 • Decrease loads to 10 mA. Decrease input source voltage to 0 V. SNVU609B – October 2018 – Revised April 2020 LM5180-Q1 Dual-Output EVM User's Guide Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 8: Test Data And Performance Curves

    = 36V = 48V = 65V Output Current (mA) Figure 5. Conversion Efficiency (Log Scale), Outputs Loaded Symmetrically LM5180-Q1 Dual-Output EVM User's Guide SNVU609B – October 2018 – Revised April 2020 Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 9: Load Regulation (Linear Scale), Sum Of

    Output Current (mA) Figure 7. Load Regulation (Log Scale), Sum of V and V Measured, Outputs Loaded Symmetrically OUT1 OUT2 SNVU609B – October 2018 – Revised April 2020 LM5180-Q1 Dual-Output EVM User's Guide Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 10 1 Ps/DIV Figure 9. SW Node Voltage, I = –I = 200 mA, V = 48 V OUT1 OUT2 LM5180-Q1 Dual-Output EVM User's Guide SNVU609B – October 2018 – Revised April 2020 Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 11 1 Ps/DIV Figure 11. Flyback Diode Voltages, I = –I = 200 mA, V = 48 V OUT1 OUT2 SNVU609B – October 2018 – Revised April 2020 LM5180-Q1 Dual-Output EVM User's Guide Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 12: Output 1 Load Transient, 50 Ma To 200 Ma At 100Ma/Μs, I

    Figure 13. Output 2 Load Transient, 50 mA to 200 mA at 100mA/µs, I = 200 mA, V = 24 V OUT1 LM5180-Q1 Dual-Output EVM User's Guide SNVU609B – October 2018 – Revised April 2020 Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 13: In = 24 V, I

    The internal soft-start timer is applicable here as the SS cap was not installed during these startup tests. SNVU609B – October 2018 – Revised April 2020 LM5180-Q1 Dual-Output EVM User's Guide Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 14: Out1 = -I

    Figure 16. Short Circuit Recovery, V = 24 V, I = –I = 200 mA Resistive OUT1 OUT2 LM5180-Q1 Dual-Output EVM User's Guide SNVU609B – October 2018 – Revised April 2020 Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 15 SS/BIAS RSET LM5180QNGURQ1 68.1k 12.1k 0.047uF 1000pF S-GND Copyright © 2018, Texas Instruments Incorporated Figure 17. EVM Schematic SNVU609B – October 2018 – Revised April 2020 LM5180-Q1 Dual-Output EVM User's Guide Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 16 Turret, PTH, 4.72 mm, VIN+, VIN–, VOUT+, VOUT–, SGND 1573-2 Keystone Electronics TP1, TP2, TP3, Test point for EN, SW, SS/BIAS, GND 5015 Keystone Electronics LM5180-Q1 Dual-Output EVM User's Guide SNVU609B – October 2018 – Revised April 2020 Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 17 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) SNVU609B – October 2018 – Revised April 2020 LM5180-Q1 Dual-Output EVM User's Guide Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 18 EVM Documentation www.ti.com Assembly Drawings Figure 20. Top Assembly Figure 21. Bottom Assembly LM5180-Q1 Dual-Output EVM User's Guide SNVU609B – October 2018 – Revised April 2020 Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 19 Figure 22. Layout Design Tips for a Dual-output PSR Flyback Converter SNVU609B – October 2018 – Revised April 2020 LM5180-Q1 Dual-Output EVM User's Guide Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 20 Under the Hood of Flyback SMPS Designs (SLUP261) • Flyback Transformer Design Considerations for Efficiency and EMI (SLUP338) LM5180-Q1 Dual-Output EVM User's Guide SNVU609B – October 2018 – Revised April 2020 Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 21 (SNVA719) • PowerPAD Thermally Enhanced Package (SLMA002) • PowerPAD Made Easy (SLMA004) • Using New Thermal Metrics (SBVA025) SNVU609B – October 2018 – Revised April 2020 LM5180-Q1 Dual-Output EVM User's Guide Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 22 Changed soft-start time, t from "4 ms" to "8 ms" ........... • Changed part number for T1 (Würth Electronik) from "TBD" to "750317595" Revision History SNVU609B – October 2018 – Revised April 2020 Submit Documentation Feedback Copyright © 2018–2020, Texas Instruments Incorporated...
  • Page 23 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 24 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 25 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 26 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 27 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 28 TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2020, Texas Instruments Incorporated...

This manual is also suitable for:

Lm5180-q1Lm25180-q1Lm25183-q1Lm25184-q1

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