LM5026

現行

具 P 或 N 通道箝位 FET 和 CS 重新啓動定時器的 100V 主動箝位電流模式 PWM 控制器

產品詳細資料

Vin (max) (V) 15 Operating temperature range (°C) -40 to 125 Control mode Current Topology Active-clamp forward Rating Catalog Features Current limiting, Dead time control, High-voltage startup, Leading edge blanking, Programmable max duty cycle, Programmable soft start, Supports NFET clamp, Supports PFET clamp, Synchronization pin Duty cycle (max) (%) 80
Vin (max) (V) 15 Operating temperature range (°C) -40 to 125 Control mode Current Topology Active-clamp forward Rating Catalog Features Current limiting, Dead time control, High-voltage startup, Leading edge blanking, Programmable max duty cycle, Programmable soft start, Supports NFET clamp, Supports PFET clamp, Synchronization pin Duty cycle (max) (%) 80
TSSOP (PW) 16 32 mm² 5 x 6.4 WSON (NHQ) 16 25 mm² 5 x 5
  • Current-Mode Control
  • Internal 100-V Start-Up Bias Regulator
  • 3-A Compound Main Gate Driver
  • High Bandwidth Optocoupler Interface
  • Programmable Line Undervoltage Lockout (UVLO)
    With Adjustable Hysteresis
  • Versatile Dual Mode Overcurrent Protection With
    Hiccup Delay Timer
  • Programmable Overlap or Deadtime between the
    Main and Active Clamp Outputs
  • Programmable Maximum Duty Cycle Clamp
  • Programmable Soft-Start
  • Leading Edge Blanking
  • Resistor Programmed 1-MHz Capable Oscillator
  • Oscillator Sync I/O Capability
  • Precision 5-V Reference
  • Current-Mode Control
  • Internal 100-V Start-Up Bias Regulator
  • 3-A Compound Main Gate Driver
  • High Bandwidth Optocoupler Interface
  • Programmable Line Undervoltage Lockout (UVLO)
    With Adjustable Hysteresis
  • Versatile Dual Mode Overcurrent Protection With
    Hiccup Delay Timer
  • Programmable Overlap or Deadtime between the
    Main and Active Clamp Outputs
  • Programmable Maximum Duty Cycle Clamp
  • Programmable Soft-Start
  • Leading Edge Blanking
  • Resistor Programmed 1-MHz Capable Oscillator
  • Oscillator Sync I/O Capability
  • Precision 5-V Reference

The LM5026 PWM controller contains all of the features necessary to implement power converters utilizing the active clamp and reset technique with current-mode control. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp and reset techniques. Two control outputs are provided, the main power switch control (OUT_A) and the active clamp switch control (OUT_B). The device can be configured to control either a P-Channel or N-Channel clamp switch. The main gate driver features a compound configuration, consisting of both MOS and Bipolar devices, providing superior gate drive characteristics. The LM5026 can be configured to operate with bias voltages over a wide input range of 8 V to 100 V. Additional features include programmable maximum duty cycle, line undervoltage lockout, cycle-by-cycle current limit, hiccup mode fault operation with adjustable timeout delay, PWM slope compensation, soft-start, 1-MHz capable oscillator with synchronization input and output capability, precision reference, and thermal shutdown.

The LM5026 PWM controller contains all of the features necessary to implement power converters utilizing the active clamp and reset technique with current-mode control. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp and reset techniques. Two control outputs are provided, the main power switch control (OUT_A) and the active clamp switch control (OUT_B). The device can be configured to control either a P-Channel or N-Channel clamp switch. The main gate driver features a compound configuration, consisting of both MOS and Bipolar devices, providing superior gate drive characteristics. The LM5026 can be configured to operate with bias voltages over a wide input range of 8 V to 100 V. Additional features include programmable maximum duty cycle, line undervoltage lockout, cycle-by-cycle current limit, hiccup mode fault operation with adjustable timeout delay, PWM slope compensation, soft-start, 1-MHz capable oscillator with synchronization input and output capability, precision reference, and thermal shutdown.

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技術文件

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類型 標題 日期
* Data sheet LM5026 Active Clamp Current Mode PWM Controller datasheet (Rev. E) PDF | HTML 2015年 11月 30日
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 2024年 4月 30日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
EVM User's guide AN-1387 LM5026 Evaluation Board (Rev. A) 2013年 5月 6日
Application note Operation and Benefits of Active-Clamp Forward Power Converters 2007年 3月 22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

LM5026EVAL — 主動鉗位電流模式 PWM 控制器

LM5026 Active Clamp Current Mode PWM Controller

使用指南: PDF
TI.com 無法提供
模擬型號

LM5026 Unencrypted PSpice Transient Model

SNVM015.ZIP (896 KB) - PSpice Model
參考設計

PMP22075 — 具 9-V to 60-V 廣泛輸入範圍的高效 12-V、5-A 主動箝位順向參考設計

此順向轉換器參考設計專為隔離式 60-W、12-V 中間匯流排電壓軌而設計。可於 9 V 至 60 V 廣泛輸入範圍中運作。設計還配備 LM5026,一款 100-V 主動箝位電流模式 PWM 控制器。自我驅動的二次整流器,使用 UCC27511 4-A 和 8-A 驅動器以提高效率。可用於需要高效率和 hiccup 保護的隔離式電源應用。
Test report: PDF
電路圖: PDF
參考設計

PMP11478 — 30W 主動鉗位順向式轉換器參考設計

PMP11478 is an isolated active clamp forward converter accepts a voltage range of 24-36V and delivers a 12V output at 2.5A. This design uses the LM5026 active clamp current-mode controller. Output voltage regulation is maintained using an LMV431 shunt regulator and opto-coupler feedback. Schottky (...)
Test report: PDF
電路圖: PDF
參考設計

PMP7895 — 12V 輸入+/-10%、12V 輸出 @ 1A 主動重設返馳式轉換器參考設計

The PMP7895 is an active reset flyback converter reference design.  The design accepts an input voltage of 12V+/-10%, and outputs 12V, capable of providing 1A of current to the load.
Test report: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
TSSOP (PW) 16 Ultra Librarian
WSON (NHQ) 16 Ultra Librarian

訂購與品質

內含資訊:
  • RoHS
  • REACH
  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中持續性的可靠性監測
內含資訊:
  • 晶圓廠位置
  • 組裝地點

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