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LM34927

現行

適用隔離 DC/DC 轉換器的 7.5-100V 大範圍 Vin 600mA 整合式二次側偏壓穩壓器

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LM5169 現行 具有 Fly-Buck™ 功能的 6V 至 120V 寬 VIN、650-mA DC/DC 轉換器 120-V rating and lower IQ.

LM34927

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck, Flybuck Iout (max) (A) 0.6 Vin (max) (V) 100 Vin (min) (V) 9 Vout (max) (V) 90 Vout (min) (V) 1.225 Switch current limit (typ) (A) 1.3 Features Enable, Synchronous Rectification, UVLO adjustable Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00005 Duty cycle (max) (%) 90
Rating Catalog Topology Buck, Flybuck Iout (max) (A) 0.6 Vin (max) (V) 100 Vin (min) (V) 9 Vout (max) (V) 90 Vout (min) (V) 1.225 Switch current limit (typ) (A) 1.3 Features Enable, Synchronous Rectification, UVLO adjustable Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.00005 Duty cycle (max) (%) 90
HSOIC (DDA) 8 29.4 mm² 4.9 x 6 WSON (NGU) 8 16 mm² 4 x 4
  • Wide 7.5-V to 100-V Input Range
  • Integrated 600-mA High-Side
    and Low-Side Switches
  • No Schottky Required
  • Constant On-Time Control
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Nearly Constant Operating Frequency
  • Intelligent Peak Current Limit
  • Adjustable Output Voltage From 1.225 V
  • Precision 2% Feedback Reference
  • Frequency Adjustable to 1 MHz
  • Adjustable Undervoltage Lockout (UVLO)
  • Remote Shutdown
  • Thermal Shutdown
  • Packages:
    • 8-pin WSON
    • 8-pin SO PowerPAD™
  • Wide 7.5-V to 100-V Input Range
  • Integrated 600-mA High-Side
    and Low-Side Switches
  • No Schottky Required
  • Constant On-Time Control
  • No Loop Compensation Required
  • Ultra-Fast Transient Response
  • Nearly Constant Operating Frequency
  • Intelligent Peak Current Limit
  • Adjustable Output Voltage From 1.225 V
  • Precision 2% Feedback Reference
  • Frequency Adjustable to 1 MHz
  • Adjustable Undervoltage Lockout (UVLO)
  • Remote Shutdown
  • Thermal Shutdown
  • Packages:
    • 8-pin WSON
    • 8-pin SO PowerPAD™

The LM34927 regulator features all of the functions needed to implement a low-cost, efficient, isolated bias regulator. This high-voltage regulator contains two 100-V N-channel MOSFET switches — a high-side buck switch and a low-side synchronous switch. The Constant on-time (COT) control scheme employed in the LM34927 device requires no loop compensation and provides excellent transient response. The regulator operates with an on-time that is inversely proportional to the input voltage. This feature allows the operating frequency to remain relatively constant. An intelligent peak current limit is implemented with integrated sense circuit. Other features include a programmable input undervoltage comparator to inhibit operation during low-voltage conditions. Protection features include thermal shutdown and VCC undervoltage lockout (UVLO). The LM34927 device is offered in WSON-8 and SO PowerPAD-8 plastic packages.

The LM34927 regulator features all of the functions needed to implement a low-cost, efficient, isolated bias regulator. This high-voltage regulator contains two 100-V N-channel MOSFET switches — a high-side buck switch and a low-side synchronous switch. The Constant on-time (COT) control scheme employed in the LM34927 device requires no loop compensation and provides excellent transient response. The regulator operates with an on-time that is inversely proportional to the input voltage. This feature allows the operating frequency to remain relatively constant. An intelligent peak current limit is implemented with integrated sense circuit. Other features include a programmable input undervoltage comparator to inhibit operation during low-voltage conditions. Protection features include thermal shutdown and VCC undervoltage lockout (UVLO). The LM34927 device is offered in WSON-8 and SO PowerPAD-8 plastic packages.

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LM5168-Q1 現行 具有 Fly-Buck™ 功能的車用 6-V 至 120-V 大範圍 VIN、300-mA DC-DC 轉換器 Fly-Buck capable 120-VIN, 300-mA device in same package.

技術文件

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重要文件 類型 標題 格式選項 日期
* Data sheet LM34927 Integrated Secondary-Side Bias Regulator for Isolated DC-DC Converters datasheet (Rev. H) PDF | HTML 2017年 11月 27日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Analog Design Journal Fly-Buck(TM) converter provides EMC and isolation in PLC applications 2015年 1月 29日
Application note AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C) 2014年 12月 17日
EVM User's guide AN-2204 LM5017 Isolated Supply Evaluation Board (Rev. B) 2013年 8月 13日
Application note AN-2202 LM34927 Integrated Bias Regulator for Isolated DC Convtr (Rev. A) 2013年 4月 23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

LM34927EVAL — 適用於 LM34927 的評估板

The LM34927 regulator features all of the functions needed to implement a low cost, efficient, isolated bias regulator. This high voltage regulator contains two 100V N-Channel MOSFET switches - a high-side buck switch and a low-side synchronous switch. The Constant-on-time (COT) control scheme (...)

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模擬型號

LM34927 PSpice Transient Model (Rev. A)

SNVM165A.ZIP (39 KB) - PSpice Model
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模擬型號

LM34927 TINA-TI Reference Design

SNVM343.TSC (194 KB) - TINA-TI Reference Design
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模擬型號

LM34927 TINA-TI Transient Spice Model

SNVM344.ZIP (10 KB) - TINA-TI Spice Model
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模擬型號

LM34927 Unencrypted PSpice Transient Model

SNVM982.ZIP (2 KB) - PSpice Model
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計算工具

FLYBUCK-FLYBACK-DESIGN-CALC — Flybuck / Flyback Calculator

This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.

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參考設計

PMP4333 — 適用於電信 (-8V@0.25A) 的 1kW 三軌隔離式 DC/DC 數位電源供應參考設計

此參考設計展示適合電信應用的全功能 1.2KW 三軌數位電源供應解決方案。輸入範圍為 36-60Vin，輸出則為兩個 48V10A (全橋) 和一個 5.5V30A (主動箝位)。此設計採用同步整流器，整體效率在全負載下高達 92%。全功能數位解決方案包括緩啟動、開機/關機序列、快速響應輸入下降，以及 OVP、OCP、OTP 和輸入 UVLO 等保護功能。其他如 LM34927、UCC27324、UCC27201 等裝置也可用於提供偏壓電源供應和驅動 FET。
Test report: PDF
參考設計

PMP4435 — 具有 GaN FET 的 48V 輸入、300W 1/8brick 數位模組參考設計

The PMP4435 is a DC-DC isolated digital module with GaN mosfet reference design targeted for industrial and telecom applications. The DC input range is 36V-60V, with 12V typical and the output is 12V/5A. An digital controller UCD3138A is used in the design. The efficiency is up to 95.8% with good (...)
Test report: PDF
電路圖: PDF
參考設計

PMP4320A — 具有數位控制且適用於電信應用的 600W 半磚式 DC/DC 轉換器參考設計

The PMP4320A reference design is a single output DC-DC converter with standard half-brick dimensions and full digital control configuration based on the UCD3138.  It is capable of delivering 50A output current with an output voltage of 12V.  The converter provides high efficiency and good (...)
Test report: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
HSOIC (DDA) 8 Ultra Librarian
WSON (NGU) 8 Ultra Librarian
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