UCC2897A

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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

产品详情

Vin (max) (V) 16 Operating temperature range (°C) -40 to 125 Control mode Current Topology Active-clamp forward Rating Catalog Features High-voltage startup, Input line monitor, Programmable slope compensation, Soft start, Soft switching, Supports PFET clamp Duty cycle (max) (%) 74
Vin (max) (V) 16 Operating temperature range (°C) -40 to 125 Control mode Current Topology Active-clamp forward Rating Catalog Features High-voltage startup, Input line monitor, Programmable slope compensation, Soft start, Soft switching, Supports PFET clamp Duty cycle (max) (%) 74
TSSOP (PW) 20 41.6 mm² 6.5 x 6.4 VQFN (RGP) 20 16 mm² 4 x 4
  • Low-output jitter
  • Soft-stop shutdown of MAIN and AUX
  • 110-V input startup function
  • Ideal for active-clamp, reset-forward, flyback and synchronous rectifier uses
  • Provides complementary auxiliary driver with programmable dead time (Turn-On Delay) between AUX and MAIN switches
  • Peak current-mode control with 0.5-V cycle-by-cycle current limiting
  • TrueDrive™ 2-A Sink, 2-A source outputs
  • Trimmed internal-bandgap reference for accurate line UV and line OV threshold
  • Programmable slope compensation
  • High-performance 1-MHz synchronizable oscillator with internal timing capacitor
  • Precise programmable maximum duty cycle
  • PB-free lead finish package
  • Low-output jitter
  • Soft-stop shutdown of MAIN and AUX
  • 110-V input startup function
  • Ideal for active-clamp, reset-forward, flyback and synchronous rectifier uses
  • Provides complementary auxiliary driver with programmable dead time (Turn-On Delay) between AUX and MAIN switches
  • Peak current-mode control with 0.5-V cycle-by-cycle current limiting
  • TrueDrive™ 2-A Sink, 2-A source outputs
  • Trimmed internal-bandgap reference for accurate line UV and line OV threshold
  • Programmable slope compensation
  • High-performance 1-MHz synchronizable oscillator with internal timing capacitor
  • Precise programmable maximum duty cycle
  • PB-free lead finish package

The UCC2897A PWM controller simplifies implementation of the various active clamp or reset and synchronous rectifier switching power topologies.

The UCC2897A is a peak current-mode fixed-frequency high-performance pulse-width modulator. The controller includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active-clamp operation.

Features include an internal programmable slope compensation circuit, precise DMAX limit, and a synchronizable oscillator with an internal-timing capacitor. An accurate line-monitoring function also programs the ON and OFF transitions of the converter with regard to the bulk input voltage, VIN.

The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directional synchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) packages.

The UCC2897A PWM controller simplifies implementation of the various active clamp or reset and synchronous rectifier switching power topologies.

The UCC2897A is a peak current-mode fixed-frequency high-performance pulse-width modulator. The controller includes the logic and the drive capability for the P-channel auxiliary switch along with a simple method of programming the critical delays for proper active-clamp operation.

Features include an internal programmable slope compensation circuit, precise DMAX limit, and a synchronizable oscillator with an internal-timing capacitor. An accurate line-monitoring function also programs the ON and OFF transitions of the converter with regard to the bulk input voltage, VIN.

The UCC2897A adds a second-level hiccup-mode current-sense threshold, bi-directional synchronization and input-overvoltage protection functionalities. The UCC2897A is offered in 20-pin TSSOP (PW) and 20-pin QFN (RGP) packages.

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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 UCC2897A Advanced Current-Mode Active-Clamp PWM Controller 数据表 (Rev. G) PDF | HTML 2019年 1月 27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 Slope Compensation Design for UCC2897A 2017年 10月 30日
技术文章 Flyback converters: two outputs are better than one PDF | HTML 2016年 11月 24日
技术文章 Excuse me for being a little forward... with my topology PDF | HTML 2015年 10月 21日
应用手册 UCC2897A Peak Current Mode Active Clamp Forward Converter Small Signal Modeling 2014年 1月 17日
应用手册 External Slope Compensation for UCC2897A in Some Special Applications 2010年 1月 5日
应用手册 Method of Providing Hiccup Operation for UCC2897AEVM 2009年 8月 27日
EVM 用户指南 Using the UCC2897AEVM 2009年 2月 27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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用户指南: PDF | HTML
英语版 (Rev.B): PDF | HTML
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用户指南: PDF
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仿真模型

UCC2897A PSpice Transient Model

SLUM429.ZIP (122 KB) - PSpice Model
仿真模型

UCC2897A TINA-TI Startup Transient Reference Design

SLUM605.TSC (5104 KB) - TINA-TI Reference Design
仿真模型

UCC2897A TINA-TI Steady State Transient Reference Design

SLUM606.TSC (2323 KB) - TINA-TI Reference Design
仿真模型

UCC2897A TINA-TI Transient Spice Model

SLUM604.ZIP (43 KB) - TINA-TI Spice Model
计算工具

SLUC662 UCC2897A Design Calculator

支持的产品和硬件

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交流/直流和直流/直流控制器(外部 FET)
UCC2897A 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

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封装 引脚 CAD 符号、封装和 3D 模型
TSSOP (PW) 20 Ultra Librarian
VQFN (RGP) 20 Ultra Librarian

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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