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AC/DC 和 DC/DC 轉換器 (整合式 FET)

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

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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 Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology PSR flyback Iout (max) (A) 0.75 Vin (min) (V) 4.5 Vin (max) (V) 65 Switching frequency (min) (kHz) 12 Switching frequency (max) (kHz) 350 Features Enable, Integrated Switch, Light load efficiency, Pre-bias soft start, UVLO adjustable Control mode Peak current mode Duty cycle (max) (%) 82 Switch current limit (typ) (A) 0.75
Rating Catalog Operating temperature range (°C) -40 to 150 TI functional safety category Functional Safety-Capable Topology PSR flyback Iout (max) (A) 0.75 Vin (min) (V) 4.5 Vin (max) (V) 65 Switching frequency (min) (kHz) 12 Switching frequency (max) (kHz) 350 Features Enable, Integrated Switch, Light load efficiency, Pre-bias soft start, UVLO adjustable Control mode Peak current mode Duty cycle (max) (%) 82 Switch current limit (typ) (A) 0.75
WSON (NGU) 8 16 mm² 4 x 4
  • 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 100V、1.5A 整合式 MOSFET 的 65VIN 無光耦返馳式轉換器 1.5-A current limit

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類型 標題 日期
* Data sheet LM5181 65-VIN PSR Flyback DC/DC Converter with 100-V, 0.75-A Integrated MOSFET datasheet (Rev. A) PDF | HTML 2021年 1月 25日
Product overview Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications (Rev. A) PDF | HTML 2024年 8月 20日
Technical article Mitigating CMTI on a PSR flyback for SiC-based traction inverter designs PDF | HTML 2024年 1月 5日
Analog Design Journal Why use PSR‐flyback isolated converters in dual‐battery mHEV systems (Rev. A) PDF | HTML 2023年 5月 25日
Application note Designing High Voltage Power Supply for Ultrasound Smart Probes (Rev. A) PDF | HTML 2023年 5月 16日
Analog Design Journal Selecting output caps to optimize ripple and stability in PSR flyback converters (Rev. B) PDF | HTML 2023年 5月 4日
Application note LM5181 Bipolar + and - 18 V Output Design for Signal Chains in PLC Applications PDF | HTML 2021年 10月 29日
Application note Topology Selection for Isolated Power Supplies in Patient Monitor (Rev. A) PDF | HTML 2020年 9月 2日
Functional safety information LMx518x-Q1 Functional Safety FIT Rate and Failure Mode Distribution (Rev. A) PDF | HTML 2020年 6月 26日
Technical article How to raise regulation performance with a stacked-output PSR flyback DC/DC conver PDF | HTML 2020年 6月 2日
Analog Design Journal How an auxless PSR-flyback converter can increase PLC reliability and density 2019年 9月 30日
White paper An overview of radiated EMI specifications for power supplies 2018年 6月 5日
White paper An overview of conducted EMI specifications for power supplies 2018年 2月 1日
Application brief PSR Flyback DC/DC Converter Transformer Design for mHEV Applications 2017年 11月 13日
Application note Seminar 900 Topic 2 - Snubber Circuits: Theory, Design and Application 2001年 2月 15日

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

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 (...)
使用指南: PDF
TI.com 無法提供
開發板

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

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 (...)
使用指南: PDF
TI.com 無法提供
模擬型號

LM5181-Q1 PSpice Transient Model (Rev. A)

SNVMBZ9A.ZIP (130 KB) - PSpice Model
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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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產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LM5181 — 具有 100-V、0.75-A 整合式 MOSFET 的 65-VIN 無光耦返馳式轉換器 LM5181-Q1 — 具有 100-V、0.75-A 整合式 MOSFET 的車用 65-VIN 無光耦返馳式 DC/DC 轉換器
軟體
計算工具
LM5181DESIGN-CALC — LM5181 PSR 返馳式轉換器設計工具
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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。
Test report: PDF
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WSON (NGU) 8 Ultra Librarian
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