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LM5181

現行

具有 100-V、0.75-A 整合式 MOSFET 的 65-VIN 無光耦返馳式轉換器

立即訂購
產品規格表

LM5181

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog 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 Catalog 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)
  • Functional Safety-Capable
  • 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
  • Ultra-low conducted and radiated EMI signatures
    • Soft switching avoids diode reverse recovery
    • Optimized for CISPR 32 EMI requirements
  • Create a custom regulator design using WEBENCH Power Designer
  • Functional Safety-Capable
  • 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
  • Ultra-low conducted and radiated EMI signatures
    • Soft switching avoids diode reverse recovery
    • Optimized for CISPR 32 EMI requirements
  • Create a custom regulator design using WEBENCH Power Designer

The LM5181 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 flyback converter is available in a 8-pin, 4-mm × 4-mm, thermally-enhanced WSON package with 0.8-mm pin pitch.

The LM5181 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 flyback converter is available in a 8-pin, 4-mm × 4-mm, thermally-enhanced WSON package with 0.8-mm pin pitch.
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LM5180 現行 具有 100-V、1.5-A 整合式 MOSFET 的 65-VIN 無光耦返馳式轉換器 1.5-A current limit

技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LM5181 65-VIN PSR Flyback DC/DC Converter with 100-V, 0.75-A Integrated MOSFET datasheet (Rev. A) PDF | HTML 2021/1/25
Product overview Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications (Rev. A) PDF | HTML 2024/8/20
技術文章 Mitigating CMTI on a PSR flyback for SiC-based traction inverter designs PDF | HTML 2024/1/5
類比設計期刊 Why use PSR‐flyback isolated converters in dual‐battery mHEV systems (Rev. A) PDF | HTML 2023/5/25
應用說明 Designing High Voltage Power Supply for Ultrasound Smart Probes (Rev. A) PDF | HTML 2023/5/16
類比設計期刊 Selecting output caps to optimize ripple and stability in PSR flyback converters (Rev. B) PDF | HTML 2023/5/4
應用說明 LM5181 Bipolar + and - 18 V Output Design for Signal Chains in PLC Applications PDF | HTML 2021/10/29
應用說明 Topology Selection for Isolated Power Supplies in Patient Monitor (Rev. A) PDF | HTML 2020/9/2
功能安全資訊 LMx518x-Q1 Functional Safety FIT Rate and Failure Mode Distribution (Rev. A) PDF | HTML 2020/6/26
技術文章 How to raise regulation performance with a stacked-output PSR flyback DC/DC conver PDF | HTML 2020/6/2
類比設計期刊 How an auxless PSR-flyback converter can increase PLC reliability and density 2019/9/30
白皮書 An overview of radiated EMI specifications for power supplies 2018/6/5
白皮書 An overview of conducted EMI specifications for power supplies 2018/2/1
Application brief PSR Flyback DC/DC Converter Transformer Design for mHEV Applications 2017/11/13
應用說明 Seminar 900 Topic 2 - Snubber Circuits: Theory, Design and Application 2001/2/15

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM5180EVM-DUAL — 寬 VIN PSR 返馳式轉換器雙輸出評估模組

LM5180EVM-DUAL 評估模組 (EVM) 旨在展示具廣泛輸入電壓範圍的 LM5180 PSR 返馳式轉換器的性能。該設計採用微型元件封裝，元件數量少。它在 10V 至 65V 的寬輸入電壓範圍內運作，以高達 200mA 的電流下提供 15V 及 -7.7V 輸出。LM5180 無需附屬線圈或光耦合器運作，可提供優於 1% 極精準的輸出電壓穩壓。LM5180 提供全套防護功能，可確保穩壓器在發生故障時提供防護。其中包括欠電壓鎖定以在電壓暫降情況下確保正常運作、可編程緩啟動以減少突波電流、Hiccup 模式過電流保護及過熱自動關機。此外，也提供精密啟用及輸出電壓熱補償功能。
使用指南: PDF
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開發板

LM5180EVM-S05 — 寬 VIN PSR 返馳式轉換器單輸出評估模組

LM5180EVM-S05 評估模組 (EVM) 旨在展示具廣泛輸入電壓範圍的 LM5180 PSR 返馳式轉換器的性能。該設計採用微型元件封裝，元件數量少。此評估模組可在 10V 至 65V 的廣泛輸入電壓範圍內運作，提供固定 5V 輸出，設定點準確度優於 1%，且最大輸出電流可達 1A。LM5180 無需附屬線圈或光耦合器運作，可提供優於 1% 極精準的輸出電壓穩壓。LM5180 提供全套防護功能，可確保穩壓器在發生故障時提供防護。其中包括欠電壓鎖定以在電壓暫降情況下確保正常運作、可編程緩啟動以減少突波電流、Hiccup (...)
使用指南: PDF
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模擬型號

LM5181-Q1 PSpice Transient Model (Rev. A)

SNVMBZ9A.ZIP (130 KB) - PSpice 模型
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計算工具

LM5181DESIGN-CALC — LM5181 PSR Flyback Converter Quickstart Design Tool

Welcome to the LM5181 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 LM5181 PSR flyback converter. As such, the user can expeditiously arrive at an optimized design to meet the application (...)
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參考設計

PMP31177 — 1-W 一次側穩壓返馳參考設計

此 26.54 mm × 11.68 mm × 5.6-mm 高度電路板已經過最佳化，充分發揮 LM5181 PSR 返馳式轉換器的性能。該電路板可於 18 V 至 32 V 輸入電壓範圍內運作，可在分別高達 40 mA 及 15 mA 的電流下提供 24-V 及 3.3‑V 輸出。LM5181 無需附屬線圈或光耦合器運作，可提供嚴格的輸出電壓穩壓。LM5181 提供多種保護功能，例如欠壓鎖定以在電壓暫降情況下提供正確運作、可編程緩啟動以減少突波電流、Hiccup 模式過電流防護，以及過熱自動關機。

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WSON (NGU) 8 Ultra Librarian
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