UCC2897A
- 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.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 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 | 2019-1-27 | ||
| 应用手册 | Understanding and Designing an Active Clamp Current Mode Controlled Converter (Rev. A) | 2020-1-27 | ||||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 应用手册 | Slope Compensation Design for UCC2897A | 2017-10-30 | ||||
| 技术文章 | Flyback converters: two outputs are better than one | PDF | HTML | 2016-11-24 | |||
| 技术文章 | Excuse me for being a little forward... with my topology | PDF | HTML | 2015-10-21 | |||
| 应用手册 | UCC2897A Peak Current Mode Active Clamp Forward Converter Small Signal Modeling | 2014-1-17 | ||||
| 应用手册 | External Slope Compensation for UCC2897A in Some Special Applications | 2010-1-5 | ||||
| 应用手册 | Method of Providing Hiccup Operation for UCC2897AEVM | 2009-8-27 | ||||
| 更多文献资料 | Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset | 2001-2-15 | ||||
| 更多文献资料 | Seminar 1000 Topic 3 - Active Clamp and Reset Technique | 2001-2-15 |
设计与开发
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TPS2372-4EVM-006 — 适用于 IEEE802.3bt PoE PD 应用的 TPS2372-4EVM 评估模块
TPS2372 评估模块 (TPS2372-4EVM-006) 包含用于 TPS2372 的评估和基准电路，后者是一种适用于高功率 PoE PD 应用（如 LED 照明和模块）的 IEEE802.3bt PoE PD 控制器。
需要 IEEE802.3bt 就绪型 PSE 控制器？查看 TPS23880。
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，后者是一种适用于高功率 PoE PD 应用的 IEEE802.3bt PoE PD 控制器。该 EVM 设计有 5V 有源钳位正向隔离式转换器，适用于高效率 70W PD 解决方案。
需要 IEEE802.3bt 就绪型 PSE 控制器？查看 TPS23880。
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，可在 48V 输入电压下提供 3.3V 稳压输出，最大负载电流达 30A。此设计可在 36V 至 72V 的完整电信输入电压范围内运行，并且能够完全调节至零负载电流。此模块使用 UCC2897A 电流模式有源钳位 PWM 控制器，有效地演示有源钳位变压器复位技术。
SLUC662 — UCC2897A Design Calculator
许多 TI 参考设计都包括 UCC2897A
通过我们的参考设计选择工具来审查并确定最适用于您应用和参数的设计。
| 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
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