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LM5025C

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具有 P 或 N 沟道钳位 FET 和 90% 最大占空比的 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) (%) 91 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) (%) 91 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
  • Internal Start-Up Bias Regulator
  • 3A Compound Main Gate Driver
  • Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
  • Voltage Mode Control with Feed-Forward
  • Adjustable Dual Mode Over-Current Protection
  • Programmable Overlap or Deadtime between the Main and Active Clamp Outputs
  • Volt x Second Clamp
  • Programmable Soft-start
  • Leading Edge Blanking
  • Single Resistor Programmable Oscillator
  • Oscillator UP / DOWN Sync Capability
  • Precision 5V Reference
  • Thermal Shutdown

Package

  • TSSOP-16

All trademarks are the property of their respective owners.

  • Internal Start-Up Bias Regulator
  • 3A Compound Main Gate Driver
  • Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
  • Voltage Mode Control with Feed-Forward
  • Adjustable Dual Mode Over-Current Protection
  • Programmable Overlap or Deadtime between the Main and Active Clamp Outputs
  • Volt x Second Clamp
  • Programmable Soft-start
  • Leading Edge Blanking
  • Single Resistor Programmable Oscillator
  • Oscillator UP / DOWN Sync Capability
  • Precision 5V Reference
  • Thermal Shutdown

Package

  • TSSOP-16

All trademarks are the property of their respective owners.

The LM5025C is a functional variant of the LM5025 active clamp PWM controller. The functional differences of the LM5025C are: The maximum duty cycle of the LM5025C is increased from 80% to 91%. The soft-start capacitor charging current is increased from 20 µA to 90 µA. The VCC regulator current limit threshold is increased from 25 mA to 55 mA. The CS1 and CS2 current limit thresholds have been increased to 0.5V. The internal CS2 filter discharge device has been disabled and no longer operates each clock cycle. The internal VCC and VREF regulators continue to operate when the line UVLO pin is below threshold.

The LM5025C PWM controller contains all of the features necessary to implement power converters utilizing the Active Clamp / Reset technique. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp / reset techniques. Two control outputs are provided, the main power switch control (OUT_A) and the active clamp switch control (OUT_B). 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 1MHz and total PWM and current sense propagation delays less than 100 ns. The LM5025C includes a high-voltage start-up regulator that operates over a wide input range of 13V to 90V. Additional features include: Line Under Voltage Lockout (UVLO), softstart, oscillator UP/DOWN sync capability, precision reference and thermal shutdown.

The LM5025C is a functional variant of the LM5025 active clamp PWM controller. The functional differences of the LM5025C are: The maximum duty cycle of the LM5025C is increased from 80% to 91%. The soft-start capacitor charging current is increased from 20 µA to 90 µA. The VCC regulator current limit threshold is increased from 25 mA to 55 mA. The CS1 and CS2 current limit thresholds have been increased to 0.5V. The internal CS2 filter discharge device has been disabled and no longer operates each clock cycle. The internal VCC and VREF regulators continue to operate when the line UVLO pin is below threshold.

The LM5025C PWM controller contains all of the features necessary to implement power converters utilizing the Active Clamp / Reset technique. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp / reset techniques. Two control outputs are provided, the main power switch control (OUT_A) and the active clamp switch control (OUT_B). 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 1MHz and total PWM and current sense propagation delays less than 100 ns. The LM5025C includes a high-voltage start-up regulator that operates over a wide input range of 13V to 90V. Additional features include: Line Under Voltage Lockout (UVLO), softstart, oscillator UP/DOWN sync capability, precision reference and thermal shutdown.

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类型 标题 下载最新的英语版本 日期
* 数据表 LM5025C Active Clamp Voltage Mode PWM Controller 数据表 (Rev. C) 2013年 3月 21日
用户指南 LM5025 Isolated Active Clamp Forward Converter Ref Design User Guide 2012年 1月 27日

设计和开发

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仿真模型

LM5025C TINA-TI Reference Design

SNVM508.TSC (1249 KB) - TINA-TI Reference Design
仿真模型

LM5025C TINA-TI Transient Spice Model

SNVM507.ZIP (27 KB) - TINA-TI Spice Model
仿真模型

LM5025C Unencrypted PSpice Transient Model Package (Rev. A)

SNVM479A.ZIP (46 KB) - PSpice Model
封装 引脚 下载
TSSOP (PW) 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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