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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM25183

現行

具有 65-V、2.5-A 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

LM25183

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) 2.5 Iout (max) (A) 2.5 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) 2.5 Iout (max) (A) 2.5 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 x 4
  • Functional Safety-Capable
  • 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
    • 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, 0.11-Ω power MOSFET
    • No optocoupler or transformer auxiliary winding required for VOUT regulation
    • Internal loop compensation
  • High-efficiency PSR flyback operation
    • Quasi-resonant MOSFET turnoff in BCM
    • 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 flyback regulator design using WEBENCH Power Designer
  • Functional Safety-Capable
  • 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
    • 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, 0.11-Ω power MOSFET
    • No optocoupler or transformer auxiliary winding required for VOUT regulation
    • Internal loop compensation
  • High-efficiency PSR flyback operation
    • Quasi-resonant MOSFET turnoff in BCM
    • 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 flyback regulator design using WEBENCH Power Designer

The LM25183 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. 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 10 W with enhanced headroom for line transients.

The LM25183 simplifies the 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, precision enable input with hysteresis for adjustable line UVLO, hiccup-mode overload protection, and thermal shutdown protection with automatic recovery.

The LM25183 flyback converter is available in a 8-pin, 4-mm × 4-mm, thermally-enhanced WSON package with 0.8-mm pin pitch.

The LM25183 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. 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 10 W with enhanced headroom for line transients.

The LM25183 simplifies the 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, precision enable input with hysteresis for adjustable line UVLO, hiccup-mode overload protection, and thermal shutdown protection with automatic recovery.

The LM25183 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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類型 標題 日期
* Data sheet LM25183 42-VIN PSR Flyback DC/DC Converter with 65-V, 2.5-A Power MOSFET datasheet (Rev. A) PDF | HTML 2020年 9月 22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
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
Functional safety information LM2518x, LM2518x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and P PDF | HTML 2020年 8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

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

LM25184EVM-S12 — 42-VIN、1-AOUT PSR 返馳式轉換器單輸出評估模組

LM25184EVM-S12 評估模組 (EVM) 旨在展示具廣泛輸入電壓範圍的 LM25184-Q1 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。可在 6 V 至 42 V 的廣泛輸入電壓範圍內運作，提供高於 1.5% 設定點準確度以及高達 1 A 電流的固定 12-V 輸出。LM25184-Q1 無需輔助繞組或光耦合器即可運作，並提供優於 1% 的極嚴格輸出電壓調節。LM25184-Q1 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 (UVLO) 以在電壓暫降情況下確保正常運作、可編程緩啟動 (SS) 以減少突波電流、Hiccup (...)
使用指南: PDF
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模擬型號

LM25183-Q1 PSpice Transient Model

SNVMBZ3.ZIP (134 KB) - PSpice Model
下載
計算工具

LM25183-LM25184DESIGN-CALC — LM25183 and LM25184 Quickstart Design Tool

Welcome to the LM25183 and LM25184 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 LM25183 and LM25184 PSR flyback converter. As such, the user can expeditiously arrive at an optimized design (...)
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產品
AC/DC 和 DC/DC 轉換器 (整合式 FET)
LM25180-Q1 — 具有 65-V、1.5-A 整合功率 MOSFET 的車用 42-VIN PSR 返馳式轉換器 LM25183 — 具有 65-V、2.5-A 整合式 MOSFET 的 42-VIN 無光耦返馳式轉換器 LM25183-Q1 — 具有 65-V、2.5-A 整合式 MOSFET 的車用 42-VIN 無光耦返馳式轉換器 LM25184 — 具有 65-V、4.1-A 整合式 MOSFET 的 42-VIN 無光耦返馳式轉換器 LM25184-Q1 — 具有 65-V、4.1-A 整合式 MOSFET 的車用 42-VIN 無光耦返馳式轉換器
硬體開發
開發板
LM25184EVM-S12 — 42-VIN、1-AOUT PSR 返馳式轉換器單輸出評估模組
軟體
計算工具
LM25183-LM25184DESIGN-CALC — LM25183 和 LM25184 PSR 返馳快速入門設計工具
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PCB 佈局

LM25184EVM-S12 PCB Layout Files

SNVR476.ZIP (1452 KB)
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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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