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AC/DC & DC/DC controllers (external FET)

UCC2893

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具有 N 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

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UCC2893

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产品详情

Vin (max) (V) 16 Operating temperature range (°C) -40 to 105 Control mode Current Topology Active-clamp forward, Flyback, Forward Rating Catalog Duty cycle (max) (%) 100
Vin (max) (V) 16 Operating temperature range (°C) -40 to 105 Control mode Current Topology Active-clamp forward, Flyback, Forward Rating Catalog Duty cycle (max) (%) 100
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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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
应用手册 Method of Providing Hiccup Operation for UCC2897AEVM 2009年 8月 27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

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

UCC2893 Unencrypted PSpice Transient Model Package (Rev. A)

SLUM034A.ZIP (122 KB) - PSpice Model
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仿真模型

UCC289x PSpice Average Model

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

UCC289x TINA-TI Average Reference Design

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

UCC289x TINA-TI Average Spice Model

SLUM155.ZIP (12 KB) - TINA-TI Spice Model
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封装 引脚 下载
SOIC (D) 16 查看选项
TSSOP (PW) 16 查看选项
应遵守 TI 评估类商品的标准条款与条件。

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

支持和培训

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