LM5180-Q1

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Automotive 65-VIN PSR flyback converter with 100-V, 1.5-A integrated power MOSFET

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Product details

Parameters

Vin (Max) (V) 65 Vin (Min) (V) 4.5 Iout (Max) (A) 1.5 Features Adjustable UVLO, Enable, Integrated Switches, Light Load Efficiency, Pre-Bias Start-Up Operating temperature range (C) -40 to 150 Regulated outputs (#) 1 Package type WSON TI functional safety category Functional Safety-Capable open-in-new Find other Isolated DC/DC converters & modules

Package | Pins | Size

WSON (NGU) 8 16 mm² 4 x 4 open-in-new Find other Isolated DC/DC converters & modules

Features

  • AEC-Q100-qualified for automotive applications
    • Device temperature grade 1: –40°C to 125°C ambient temperature range
  • Designed for reliable and rugged applications
    • Wide input voltage range of 4.5 V to 65 V
    • Robust solution with only one component crossing the isolation barrier
    • ±1.5% total output regulation accuracy
    • Optional VOUT temperature compensation
    • 6-ms internal or programmable soft start
    • Input UVLO and thermal shutdown protection
    • Hiccup-mode overcurrent fault protection
    • –40°C to +150°C junction temperature range
  • Integration reduces solution size and cost
    • Integrated 100-V, 0.4-Ω power MOSFET
    • No opto-coupler or transformer auxiliary winding required for VOUT regulation
    • Low EMI operation to meet CISPR 25
  • High efficiency PSR flyback operation
    • Quasi-resonant switching in boundary conduction mode (BCM) at heavy load
    • External bias option for improved efficiency
    • Single- and multi-output implementations
  • Create a custom regulator design using WEBENCH® Power Designer

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Description

The LM5180-Q1 is a primary-side regulated (PSR) flyback converter with high efficiency over a wide input voltage range of 4.5 V to 65 V. The isolated output voltage is sampled from the primary-side flyback voltage, eliminating the need for an optocoupler, voltage reference, or third winding from the transformer for output voltage regulation. The high level of integration results in a simple, reliable and high-density design with only one component crossing the isolation barrier. Boundary conduction mode (BCM) switching enables a compact magnetic solution and better than ±1.5% load and line regulation performance. An integrated 100-V power MOSFET provides output power up to 7 W with enhanced headroom for line transients.

The LM5180-Q1 converter simplifies implementation of isolated DC/DC supplies with optional features to optimize performance for the target end equipment. The output voltage is set by one resistor, while an optional resistor improves output voltage accuracy by negating the thermal coefficient of the flyback diode voltage drop. Additional features include an internally-fixed or externally-programmable soft start, optional bias supply connection for higher efficiency, precision enable input with hysteresis for adjustable line UVLO, hiccup-mode overload protection, and thermal shutdown protection with automatic recovery.

The LM5180-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in 8-pin WSON package with 0.8-mm pin pitch and wettable flanks.

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Technical documentation

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Type Title Date
* Datasheet LM5180-Q1 65-VIN PSR Flyback DC/DC Converter with 100-V, 1.5-A Integrated MOSFET datasheet (Rev. C) Apr. 12, 2019
Application note LM5180 EMI Performance Apr. 04, 2021
Functional safety information LMx518x-Q1 Functional Safety FIT Rate and Failure Mode Distribution (Rev. A) Jun. 26, 2020
Technical article How to raise regulation performance with a stacked-output PSR flyback DC/DC converter Jun. 02, 2020
Application note Why use PSR‐flyback isolated converters in dual‐battery mHEV systems Mar. 19, 2020
Application note Extending the Input Voltage Range of the LM5180‐Q1 PSR Flyback for VDA320(LV148) Jan. 30, 2020
Application note How an auxless PSR-flyback converter can increase PLC reliability and density Sep. 30, 2019
User guide LM5180-Q1 Dual-Output EVM User's Guide (Rev. B) Jul. 18, 2019
User guide LM5180-Q1 Single-Output EVM User's Guide (Rev. D) Jul. 18, 2019
Application note DC/DC Buck Converters With Ultra-Low IQ for Industrial Battery-Pack Applications Feb. 20, 2019
Technical article Searching for the newest innovations in power? Find them at APEC Feb. 09, 2019
White paper An overview of radiated EMI specifications for power supplies Jun. 05, 2018
White paper An overview of conducted EMI specifications for power supplies Feb. 01, 2018
Application note PSR Flyback DC/DC Converter Transformer Design for mHEV Applications Nov. 13, 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
99
Description
The LM5180EVM-DUAL evaluation module (EVM) is designed to showcase the performance of the LM5180 PSR flyback converter with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a wide input voltage range of 10 V to 65 V to deliver a (...)
Features
  • 10-V to 65-V input voltage range
  • 15-V and -7.7-V output voltages
  • Rated for up to 200 mA of load current
  • Resistor divider to EN/UVLO to faciltate programmable input voltage UVLO
  • Fully assembled, tested and proven PCB layout with small footprint
EVALUATION BOARD Download
document-generic User guide
75
Description
The LM5180EVM-S05 evaluation module (EVM) is designed to showcase the performance of the LM5180 PSR flyback converter with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a wide input voltage range of 10 V to 65 V to deliver a (...)
Features
  • 10-V to 65-V input voltage range
  • 5-V output voltage with 1% setpoint accuracy
  • Rated for up to 1 A of load current
  • Resistor divider to EN/UVLO to faciltate programmable input voltage UVLO
  • Fully assembled, tested and proven PCB layout with small footprint

Design tools & simulation

SIMULATION MODEL Download
SNVMBL6.ZIP (183 KB) - PSpice Model
SIMULATION MODEL Download
SNVMBW8.TSC (1102 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNVMBW9.TSC (1100 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNVMBX0.TSC (1352 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SNVMBX1.TSC (1345 KB) - TINA-TI Reference Design
CALCULATION TOOL Download
LM5180 PSR flyback converter design tool
LM5180DESIGN-CALC — Welcome to the LM5180 quickstart design tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC flyback regulator based on the LM5180 PSR flyback converter. As such, the user can expeditiously arrive at an optimized design to meet the application (...)
document-generic User guide
Features
  • Select transformer parameters including turns ratio and mag inductance
  • Determine input and output capacitances for specified ripple requirements (1% Vout and 5% Vin)
  • Select components for feedback, soft-start, input UVLO, and temperature compensation
  • Advise components (usually optional) for SW voltage (...)
GERBER FILE Download
SNVC218A.ZIP (2527 KB)
PCB LAYOUT Download
SNVC233.ZIP (1903 KB)
PCB LAYOUT Download
SNVR472.ZIP (3416 KB)

Reference designs

REFERENCE DESIGNS Download
Dual-output bias power supply reference design for inverter and motor drive applications
PMP22760 — This isolated primary-side regulated (PSR) flyback converter reference design provides dual +15-V outputs at 100 mA each. It was designed to provide bias power for a rotor coil excitation gate driver in motor/ inverter applications. The isolated output voltage is sampled from the primary-side (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
3.5-W automotive dual-output PSR flyback regulator reference design
PMP30750 — This reference design showcases a dual output primary-side regulated flyback converter, which covers an input voltage range of 8.0 V to 36 V. The output voltage of the two isolated outputs is 17.5 V each with a maximum load current of 100 mA.
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
SiC/IGBT isolated gate driver reference design with thermal diode and sensing FET
TIDA-020030 — This reference design is an IGBT or SiC isolated gate driver power stage driving a IGBT module with advanced protection features. The design consists of a single phase power stage from a traction inverter supporting high level of safety features. The IGBT module has integrated thermal diode for (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Channel-to-channel isolated analog input module reference design
TIDA-010048 — This reference design is a four channel-to-channel, isolated 4–20 mA, current-loop analog input module. The design includes a short circuit, overcurrent, and overvoltage limit function for condition monitoring sensor and module applications. The major features of this analog input module (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
4.5-V to 65-V input, compact bias supply with power stage reference design for IGBT/SiC gate drivers
TIDA-020015 — This reference design is a 4.2-W, single-channel, automotive 12-V battery input flyback bias supply for IGBT/SiC isolated gate drivers. The supply accepts a wide input range of 4.5-V to 65-V DC. The output is configurable as +15 V,–8 V or +20 V, –4 V at loads up to 180 mA for driving the (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
HEV/EV traction inverter power stage with 3 types of IGBT/SiC bias-supply solutions reference design
TIDA-020014 — This reference design presents a traction inverter single-phase power stage with three 12-V car battery inputs, 4.2-W bias supply solutions for hybrid electric vehicle and electric vehicle (HEV/EV) systems. All bias-supply solutions accept a wide input range of 4.5 V to 42 V DC from a 12-V car (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Compact, efficient, 24-V input auxiliary power supply reference design for servo drives
TIDA-010009 — This reference design showcases a method to generate power supplies required in a servo or AC drive including the analog and digtal I/O interfaces, encoder supply, isolated transceivers and digital processing block. This design also implements protection against input reverse polarity, output (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WSON (NGU) 8 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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