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LM5181-Q1

AKTIV

No-Opto-Flyback-DC/DC-Wandler für die Automobilindustrie, 65 V Eingangsspannung, mit integriertem MO

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Datenblatt

LM5181-Q1

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Rating Automotive Topology PSR flyback Switch current limit (typ) (A) 0.75 Iout (max) (A) 0.75 Vin (max) (V) 65 Vin (min) (V) 4.5 Features Enable, Integrated Switch, Light load efficiency, Pre-bias soft start, UVLO adjustable Control mode Peak current mode Switching frequency (min) (kHz) 12 Switching frequency (max) (kHz) 350 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Duty cycle (max) (%) 82
Rating Automotive Topology PSR flyback Switch current limit (typ) (A) 0.75 Iout (max) (A) 0.75 Vin (max) (V) 65 Vin (min) (V) 4.5 Features Enable, Integrated Switch, Light load efficiency, Pre-bias soft start, UVLO adjustable Control mode Peak current mode Switching frequency (min) (kHz) 12 Switching frequency (max) (kHz) 350 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 150 Duty cycle (max) (%) 82
WSON (NGU) 8 16 mm² (4 mm × 4 mm)
  • AEC-Q100-qualified for automotive applications
    • Device temperature grade 1: –40°C to 125°C ambient temperature range
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • Designed for reliable and rugged applications
    • Wide input voltage range of 4.5 V to 65 V with operation down to 3.5 V after start-up
    • 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
    • Internal loop compensation
  • High-efficiency PSR flyback operation
    • Quasi-resonant MOSFET turn-off in BCM
    • Low input quiescent current
    • External bias option for improved efficiency
    • Single- and multi-output implementations
  • Create a custom regulator design using WEBENCH® Power Designer
  • Ultra-low conducted and radiated EMI signatures
    • Soft switching avoids diode reverse recovery
    • Optimized for CISPR 25 Class 5 requirement
  • AEC-Q100-qualified for automotive applications
    • Device temperature grade 1: –40°C to 125°C ambient temperature range
  • Functional Safety-Capable
    • Documentation available to aid functional safety system design
  • Designed for reliable and rugged applications
    • Wide input voltage range of 4.5 V to 65 V with operation down to 3.5 V after start-up
    • 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
    • Internal loop compensation
  • High-efficiency PSR flyback operation
    • Quasi-resonant MOSFET turn-off in BCM
    • Low input quiescent current
    • External bias option for improved efficiency
    • Single- and multi-output implementations
  • Create a custom regulator design using WEBENCH® Power Designer
  • Ultra-low conducted and radiated EMI signatures
    • Soft switching avoids diode reverse recovery
    • Optimized for CISPR 25 Class 5 requirement

The LM5181-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 4 W with enhanced headroom for line transients.

The LM5181-Q1 converter 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.

The LM5181-Q1 flyback 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 LM5181-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 4 W with enhanced headroom for line transients.

The LM5181-Q1 converter 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.

The LM5181-Q1 flyback 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.
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LM5180-Q1 AKTIV No-Opto-Flyback-Wandler für die Automobilindustrie, 65 V Eingangsspannung, mit integriertem MOSFET, 1.5-A current limit

Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt LM5181-Q1 65-VIN PSR Flyback DC/DC Converter with 100-V, 0.75-A Integrated MOSFET datasheet PDF | HTML 29.10.2019
Application brief Optimized Excitation Power Stage for Electrically Excited Synchronous Machines (Rev. A) PDF | HTML 05.05.2026
Analog Design Journal Why use PSR‐flyback isolated converters in dual‐battery mHEV systems (Rev. A) PDF | HTML 25.05.2023
Anwendungshinweis Designing High Voltage Power Supply for Ultrasound Smart Probes (Rev. A) PDF | HTML 16.05.2023
Anwendungshinweis LM5181 Bipolar + and - 18 V Output Design for Signal Chains in PLC Applications PDF | HTML 29.10.2021
Technischer Artikel MHEVs: Optimizing the automotive powertrain for efficiency and cost PDF | HTML 24.05.2021
Anwendungshinweis LM5180 EMI Performance PDF | HTML 04.04.2021
Anwendungshinweis Topology Selection for Isolated Power Supplies in Patient Monitor (Rev. A) PDF | HTML 02.09.2020
Informationen zur funktionalen Sicherheit LMx518x-Q1 Functional Safety FIT Rate and Failure Mode Distribution (Rev. A) PDF | HTML 26.06.2020
Technischer Artikel How to raise regulation performance with a stacked-output PSR flyback DC/DC conver PDF | HTML 02.06.2020
Analog Design Journal How an auxless PSR-flyback converter can increase PLC reliability and density 30.09.2019
Whitepaper An overview of radiated EMI specifications for power supplies 05.06.2018
Whitepaper An overview of conducted EMI specifications for power supplies 01.02.2018
Application brief PSR Flyback DC/DC Converter Transformer Design for mHEV Applications 13.11.2017
Anwendungshinweis Seminar 900 Topic 2 - Snubber Circuits: Theory, Design and Application 15.02.2001

Design und Entwicklung

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Evaluierungsplatine

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Evaluierungsplatine

LM5180EVM-S05 — Evaluierungsmodul für PSR-Flyback-Wandler mit breitem VIN-Bereich und Einfachausgang

Das LM5180EVM-S05-Evaluierungsmodul (EVM) wurde entwickelt, um die Leistung des PSR-Flyback-Wandlers LM5180 mit großem Eingangsspannungsbereich zu demonstrieren. Das Design ist in einem miniaturisierten Gehäuse mit geringer Komponentenanzahl erhältlich. Es arbeitet über einen weiten (...)
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Simulationsmodell

LM5181-Q1 PSpice Transient Model (Rev. A)

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Berechnungstool

LM5181DESIGN-CALC — LM5181 PSR Flyback Converter Quickstart Design Tool

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