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UCC2891

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具有 P 沟道钳位 FET 和 0.75V CS 阈值的 110V 有源钳位电流模式 PWM 控制器

产品详情

Topology Active-clamp forward, Flyback, Forward Control mode Current Duty cycle (max) (%) 100 Switching frequency (max) (kHz) 1000 Features High-voltage startup, Input line monitor, Multi-topology, Programmable slope compensation, Soft start, Soft switching, Supports NFET clamp UVLO thresholds on/off (V) 13/8 Operating temperature range (°C) -40 to 85 Rating Catalog Gate drive (typ) (A) 2.5 Vin (max) (V) 16
Topology Active-clamp forward, Flyback, Forward Control mode Current Duty cycle (max) (%) 100 Switching frequency (max) (kHz) 1000 Features High-voltage startup, Input line monitor, Multi-topology, Programmable slope compensation, Soft start, Soft switching, Supports NFET clamp UVLO thresholds on/off (V) 13/8 Operating temperature range (°C) -40 to 85 Rating Catalog Gate drive (typ) (A) 2.5 Vin (max) (V) 16
SOIC (D) 16 59.4 mm² 9.9 x 6 TSSOP (PW) 16 32 mm² 5 x 6.4
  • Low Output Jitter
  • Soft-Stop Shutdown of MAIN and AUX
  • Ideal for Active Clamp/Reset Forward, Flyback Converters
  • Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches
  • Peak Current-Mode Control with Cycle-by-Cycle Current Limiting
  • 110-V Input Startup Regulator on UCC2891/3
  • TrueDrive™ 2-A Sink, 2-A Source Outputs
  • Accurate Line UV and Line OV Threshold
  • Programmable Slope Compensation
  • 1.0-MHz Synchronizable Oscillator
  • Precise Programmable Maximum Duty Cycle
  • Programmable Soft Start
  • APPLICATIONS
    • 150-W to 700-W SMPS
    • High-Efficiency, Low EMI/RFI Off-Line or DC/DC Converters
    • Server, 48-V Telecom, Datacom
    • High Power Adapter, LCD-TV and PDP-TV

  • Low Output Jitter
  • Soft-Stop Shutdown of MAIN and AUX
  • Ideal for Active Clamp/Reset Forward, Flyback Converters
  • Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches
  • Peak Current-Mode Control with Cycle-by-Cycle Current Limiting
  • 110-V Input Startup Regulator on UCC2891/3
  • TrueDrive™ 2-A Sink, 2-A Source Outputs
  • Accurate Line UV and Line OV Threshold
  • Programmable Slope Compensation
  • 1.0-MHz Synchronizable Oscillator
  • Precise Programmable Maximum Duty Cycle
  • Programmable Soft Start
  • APPLICATIONS
    • 150-W to 700-W SMPS
    • High-Efficiency, Low EMI/RFI Off-Line or DC/DC Converters
    • Server, 48-V Telecom, Datacom
    • High Power Adapter, LCD-TV and PDP-TV

The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies.

The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation.

The UCC2891/3 includes a 110-V start-up regulator for initial start-up and to provide keep-alive power during stand-by.

Additional features include an internal programmable slope compensation circuit, precise DMAX limit, and a single resistor programmable synchronizable oscillator. An accurate line monitoring function also programs the converter\x92s ON and OFF transitions with regard to the bulk input voltage. Along with the UCC2897, this UCC289x family allows the power supply designer to eliminate many of the external components, reducing the size and complexity of the design.

The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies.

The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation.

The UCC2891/3 includes a 110-V start-up regulator for initial start-up and to provide keep-alive power during stand-by.

Additional features include an internal programmable slope compensation circuit, precise DMAX limit, and a single resistor programmable synchronizable oscillator. An accurate line monitoring function also programs the converter\x92s ON and OFF transitions with regard to the bulk input voltage. Along with the UCC2897, this UCC289x family allows the power supply designer to eliminate many of the external components, reducing the size and complexity of the design.

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UCC2897A 正在供货 具有 P 沟道钳位 FET 和线路过压保护的 110V 有源钳位电流模式 PWM 控制器 Supports active clamp topology

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 UCC289x Current Mode Active Clamp PWM Controller 数据表 (Rev. F) 2009年 7月 1日
应用手册 Understanding and Designing an Active Clamp Current Mode Controlled Converter (Rev. A) 2020年 1月 27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
模拟设计期刊 60A交错式有源钳位正向转换器设计 英语版 2013年 3月 18日
模拟设计期刊 2013 年第 1 季度刊模拟应用学报 2013年 1月 22日
用户指南 48-V to 3.3-V Forward Converter w/Active Clamp Reset Using the UCC2891 Active Cl (Rev. A) 2012年 4月 13日
应用手册 Method of Providing Hiccup Operation for UCC2897AEVM 2009年 8月 27日
用户指南 48-V to 3.3-V Forward Converter w/Active Clamp Reset (Rev. A) 2006年 12月 12日
应用手册 Active Clamp Transformer Reset: High Side or Low Side? 2004年 9月 17日
应用手册 UCC2891 Active Clamp 2003年 12月 22日
更多文献资料 Seminar 1000 Topic 3 - Active Clamp and Reset Technique 2001年 2月 15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

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评估板

UCC2891EVM-520 — 用于 UCC2891 电流模式有源钳位 PWM 控制器的评估模块

UCC2891EVM 评估模块 (EVM) 是一款正向转换器,在 30A 负载电流 时提供 3.3V 稳压输出,并由 48V 输入提供电源。此 EVM 将在整个 36V 至 75V 电信输入范围下工作,并且可以完全稳压至零负载电流。此模块使用 UCC2891 电流模式有源钳位 PWM 控制器,用于高效演示有源钳位转换器的重置技术。通过与同步整流相结合,此 EVM 可设置为在 250kHz 频率下工作,显示峰值效率略微超过 92%,满载效率为 89%。
用户指南: PDF
TI.com 上无现货
仿真模型

UCC2891 TINA-TI Startup Reference Design

SLUM294.TSC (667 KB) - TINA-TI Reference Design
仿真模型

UCC2891 TINA-TI Steady State Reference Design

SLUM292.TSC (183 KB) - TINA-TI Reference Design
仿真模型

UCC2891 TINA-TI Transient Spice Model

SLUM293.ZIP (42 KB) - TINA-TI Spice Model
仿真模型

UCC2891 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM050A.ZIP (117 KB) - PSpice Model
仿真模型

UCC289x PSpice Average Model

SLUC118.ZIP (353 KB) - PSpice Model
仿真模型

UCC289x TINA-TI Average Reference Design

SLUM154.TSC (834 KB) - TINA-TI Reference Design
仿真模型

UCC289x TINA-TI Average Spice Model

SLUM155.ZIP (12 KB) - TINA-TI Spice Model
封装 引脚 下载
SOIC (D) 16 查看选项
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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