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LM5025

正在供货

具有 P 或 N 沟道钳位 FET 和 0.25V CS 阈值的 90V 有源钳位电压模式 PWM 控制器

产品详情

Topology Active-clamp forward, Forward Control mode Feedforward Duty cycle (max) (%) 80 Switching frequency (max) (kHz) 1000 Features Current limiting, High-voltage startup, Leading edge blanking, Soft start, Supports NFET clamp, Supports PFET clamp, Thermal shutdown UVLO thresholds on/off (V) Programmable/2.5V Operating temperature range (°C) -40 to 125 Rating Catalog Gate drive (typ) (A) 3 Vin (max) (V) 15
Topology Active-clamp forward, Forward Control mode Feedforward Duty cycle (max) (%) 80 Switching frequency (max) (kHz) 1000 Features Current limiting, High-voltage startup, Leading edge blanking, Soft start, Supports NFET clamp, Supports PFET clamp, Thermal shutdown UVLO thresholds on/off (V) Programmable/2.5V Operating temperature range (°C) -40 to 125 Rating Catalog Gate drive (typ) (A) 3 Vin (max) (V) 15
TSSOP (PW) 16 32 mm² 5 x 6.4 WSON (NHQ) 16 25 mm² 5 x 5
  • Internal Start-Up Bias Regulator
  • 3-A Compound Main Gate Driver
  • Programmable Line Undervoltage Lockout (UVLO)
    With Adjustable Hysteresis
  • Voltage Mode Control With Feed-Forward
  • Adjustable Dual-Mode Overcurrent Protection
  • Programmable Overlap or Deadtime Between the
    Main and Active Clamp Outputs
  • Volt × Second Clamp
  • Programmable Soft-Start
  • Leading Edge Blanking
  • Single Resistor Programmable Oscillator
  • Oscillator UP and DOWN Sync Capability
  • Precision 5-V Reference
  • Thermal Shutdown
  • Internal Start-Up Bias Regulator
  • 3-A Compound Main Gate Driver
  • Programmable Line Undervoltage Lockout (UVLO)
    With Adjustable Hysteresis
  • Voltage Mode Control With Feed-Forward
  • Adjustable Dual-Mode Overcurrent Protection
  • Programmable Overlap or Deadtime Between the
    Main and Active Clamp Outputs
  • Volt × Second Clamp
  • Programmable Soft-Start
  • Leading Edge Blanking
  • Single Resistor Programmable Oscillator
  • Oscillator UP and DOWN Sync Capability
  • Precision 5-V Reference
  • Thermal Shutdown

The LM5025 PWM controller contains all of the features necessary to implement power converters using the active clamp and reset technique. The device can be configured to control either a P-channel clamp switch or an N-channel clamp switch. 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 active clamp output can be configured for either a specified overlap time (for P-channel switch applications) or a specified deadtime (for N_channel applications). The two internal compound gate drivers parallel both MOS and bipolar devices, providing superior gate drive characteristics. This controller is designed for high-speed operation including an oscillator frequency range up to 1 MHz and total PWM and current sense propagation delays less than 100 ns.

The LM5025 includes a high-voltage start-up regulator that operates over a wide input range of 13 V to 90 V. Additional features include: line undervoltage lockout (UVLO), soft-start, oscillator UP and DOWN sync capability, precision reference and thermal shutdown.

The LM5025 PWM controller contains all of the features necessary to implement power converters using the active clamp and reset technique. The device can be configured to control either a P-channel clamp switch or an N-channel clamp switch. 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 active clamp output can be configured for either a specified overlap time (for P-channel switch applications) or a specified deadtime (for N_channel applications). The two internal compound gate drivers parallel both MOS and bipolar devices, providing superior gate drive characteristics. This controller is designed for high-speed operation including an oscillator frequency range up to 1 MHz and total PWM and current sense propagation delays less than 100 ns.

The LM5025 includes a high-voltage start-up regulator that operates over a wide input range of 13 V to 90 V. Additional features include: line undervoltage lockout (UVLO), soft-start, oscillator UP and DOWN sync capability, precision reference and thermal shutdown.

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LM5025A 正在供货 具有 P 或 N 沟道钳位 FET 和 0.5V CS 阈值的 90V 有源钳位电压模式 PWM 控制器 This product has performance improvement over LM5025.

技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 LM5025 Active Clamp Voltage Mode PWM Controller 数据表 (Rev. C) PDF | HTML 2016年 1月 14日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
技术文章 Power Tips: A simple circuit to implement smooth soft start for an isolated conver PDF | HTML 2017年 5月 1日
EVM 用户指南 AN-1345 LM5025A Evaluation Board (Rev. B) 2013年 5月 6日
EVM 用户指南 AN-1368 LM5115/5025A Evaluation Board (Rev. A) 2013年 4月 26日
EVM 用户指南 AN-1542 LM5115A Evaluation Board (Rev. B) 2013年 4月 24日
更多文献资料 Die D/S LM5025 MDC Active Clamp Voltage Mode Pwm Controller 2012年 9月 27日
用户指南 LM5025 Isolated Active Clamp Forward Converter Ref Design User Guide 2012年 1月 27日
应用手册 Operation and Benefits of Active-Clamp Forward Power Converters 2007年 3月 22日
用户指南 Application Note 1542 LM5115A Evaluation Board (cn) 2007年 3月 17日
白皮书 PWM DC-DC Cntrllrs w/Built-In Strt-Up Regs Simp Switch Pwr Supply Design 2005年 10月 1日
应用手册 Active Clamp Transformer Reset: High Side or Low Side? 2004年 9月 17日
更多文献资料 Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset 2001年 2月 15日

设计和开发

如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。

仿真模型

LM5025 PSPICE Model (Rev. A)

SNVM013A.ZIP (63 KB) - PSpice Model
仿真模型

LM5025 TINA-TI Transient Reference Design

SNVMBD8.TSC (2675 KB) - TINA-TI Reference Design
仿真模型

LM5025 TINA-TI Transient Spice Model

SNVMBD9.ZIP (26 KB) - TINA-TI Spice Model
封装 引脚 下载
TSSOP (PW) 16 查看选项
WSON (NHQ) 16 查看选项

订购和质量

包含信息:
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息:
  • 制造厂地点
  • 封装厂地点

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