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AC/DC 轉換器

LM25180

現行

具 65V、1.5A 整合式 MOSFET 的 42-Vin 無光耦返馳式轉換器

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產品規格表

LM25180

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Flyback Switch current limit (typ) (A) 1.5 Iout (max) (A) 1.5 Vin (max) (V) 42 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 Type Converter (Integrated Switch)
Rating Catalog Topology Flyback Switch current limit (typ) (A) 1.5 Iout (max) (A) 1.5 Vin (max) (V) 42 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 Type Converter (Integrated Switch)
WSON (NGU) 8 16 mm² (4 mm × 4 mm)
  • Designed for reliable and rugged applications
    • Wide input voltage range of 4.5 V to 42 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 65-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
  • Designed for reliable and rugged applications
    • Wide input voltage range of 4.5 V to 42 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 65-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 LM25180 is a primary-side regulated (PSR) flyback converter with high efficiency over a wide input voltage range of 4.5 V to 42 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 65-V power MOSFET provides output power up to 7 W with enhanced headroom for line transients.

The LM25180 flyback converter is available in a 8-pin, 4-mm × 4-mm, thermally-enhanced WSON package with 0.8-mm pin pitch.

The LM25180 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 LM25180 is a primary-side regulated (PSR) flyback converter with high efficiency over a wide input voltage range of 4.5 V to 42 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 65-V power MOSFET provides output power up to 7 W with enhanced headroom for line transients.

The LM25180 flyback converter is available in a 8-pin, 4-mm × 4-mm, thermally-enhanced WSON package with 0.8-mm pin pitch.

The LM25180 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 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 65-V input rating

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 LM25180 42-VIN PSR Flyback DC/DC Converter with 65-V, 1.5-A Integrated Power MOSFET datasheet (Rev. B) PDF | HTML 2019/9/18
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 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

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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計算工具

LM25180DESIGN-CALC — LM25180 Flyback Converter Quickstart Design Tool

歡迎使用 LM25180 快速入門設計工具。此獨立工具有助於電源供應工程師設計基於 LM25180 PSR 返馳轉換器的 DC/DC 返馳穩壓器。因此，使用者可以迅速達到最佳化的設計，以符合應用需求。

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參考設計

TIDA-010006 — 具備整合式交換器 PSR 返馳控制器的隔離式 IGBT 閘極驅動電源參考設計

此參考設計 透過 24-V DC 輸入電源，為絕緣式閘極雙極電晶體 (IGBT) 閘極驅動器提供隔離式正負電壓軌。該產品使用返馳電源拓撲產生四對 15-V 和 –5-V 輸出，適合供電給六個各為 1W 的 IGBT 閘極驅動器。在 LM5180 返馳式轉換器中整合 100-V 額定一次側開關，並免除輔助變壓器繞組，可實現精巧的解決方案。

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參考設計

TIDA-010257 — 10kW Vienna 整流器式三相功率因數校正參考設計

Vienna 整流器電源拓撲用於高功率三相功率因數校正應用，如電器、電動車 (EV) 充電器和電信整流器。整流器的控制設計可能十分複雜。此參考設計說明了使用 C2000™ 微控制器 (MCU) 控制功率級的方法。此設計還能夠基於圖形使用者介面 (GUI) 對 Vienna 整流器進行監控和控制。此設計提供的軟硬體可協助加快上市時間。
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參考設計

TIDA-01535 — 適用於電源隔離式超小型類比輸出模組的參考設計

此單通道、電源隔離式類比輸出模組參考設計使用高度整合的 DAC8771 數位轉類比轉換器 (DAC) 提供電流和電壓輸出。DAC8771 的高度整合與 LM25180 一次側穩壓返馳式轉換器耦合，實現了電路板尺寸為 52-mm × 40-mm、最大零組件高度為 4mm 的精巧隔離式設計。此外，此設計採用外部電路，可針對電磁干擾 (EMI) 和電磁相容性 (EMC) 提供暫態保護。

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
WSON (NGU) 8 Ultra Librarian
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