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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

Topology Active-clamp forward Control mode Current Duty cycle (max) (%) 74 Switching frequency (max) (kHz) 1000 Features High-voltage startup, Input line monitor, Programmable slope compensation, Soft start, Soft switching, Supports PFET clamp UVLO thresholds on/off (V) 12.7/8 Operating temperature range (°C) -40 to 125 Rating Catalog Gate drive (typ) (A) 2 Vin (max) (V) 16
Topology Active-clamp forward Control mode Current Duty cycle (max) (%) 74 Switching frequency (max) (kHz) 1000 Features High-voltage startup, Input line monitor, Programmable slope compensation, Soft start, Soft switching, Supports PFET clamp UVLO thresholds on/off (V) 12.7/8 Operating temperature range (°C) -40 to 125 Rating Catalog Gate drive (typ) (A) 2 Vin (max) (V) 16
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

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)。

评估板

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The TPS2372 evaluation module (TPS2372-4EVM-006) contains evaluation and reference circuitry for the TPS2372, which is a IEEE802.3bt PoE PD controller suitable for high power PoE PD applications such as LED lighting and modules.

In need of an IEEE802.3bt-ready PSE controller? Check out the TPS23880.
用户指南: PDF
TI.com 上无现货
评估板

TPS2373-4EVM-758 — 适用于 IEEE802.3bt PoE PD 应用的 TPS2373-4 评估模块

TPS2373 评估模块 (TPS2373-4EVM-758) 包含用于 TPS2373 的评估和基准电路,它是适用于高功率 PoE PD 应用的 IEEE802.3bt PoE PD 控制器。

用户指南: PDF | HTML
下载英文版本 (Rev.B): PDF | HTML
TI.com 上无现货
评估板

UCC2897AEVM — UCC2897A 评估模块

UCC2897A 评估模块 (EVM) 是一款有源钳位复位正向转换器,在 30 A 负载电流时提供 3.3V 稳压输出,并由 48V 输入提供电源。此设计将在整个 36V 至 72V 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 UCC2897A 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。

用户指南: PDF
TI.com 上无现货
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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产品
PWM 控制器
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 下载
TSSOP (PW) 20 查看选项
VQFN (RGP) 20 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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