UCC2897A 高级电流模式有源钳位 PWM 控制器

	UCC2897A
Control Method	Current Mode
Frequency(Max)(kHz)	1000
Pin/Package	20QFN, 20TSSOP
Regulated Outputs(#)	1
Operating Temperature Range(°C)	-40 to 125
Rating	Catalog

UCC2897A 描述

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

The UCC2897A is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It 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 converter’s ON and OFF transitions 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.

UCC2897A 特性

• Low Output Jitter
• "Soft Stop" shut down 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 Deadtime (Turn-On Delay) between AUX and MAIN Switches
• Peak Current-Mode Control with 0.5-V Cycle-by-Cycle Current Limiting
• TrueDriveTM 2-A Sink, 2-A Source Outputs
• Trimmed Internal Bandgap Reference for Accurate Line UV and Line OV Threshold
• Programmable Slope Compensation
• High-Performance 1.0-MHz Synchronizable Oscillator with Internal Timing Capacitor
• Precise Programmable Maximum Duty Cycle
• PB-Free Lead Finish Package
• APPLICATIONS
  • High-Efficiency DC/DC Power Supplies
  • Server Power, 48-V Telecom, Datacom, and 42-V Automotive Applications

UCC2897A 芯片订购指南

器件	状态	温度 (oC)	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
UCC2897APW	ACTIVE	-40 to 125	1.35 | 1ku	TSSOP (PW) | 20	70 | TUBE	UCC2897A
UCC2897APWR	ACTIVE	-40 to 125	1.20 | 1ku	TSSOP (PW) | 20	2000 | LARGE T&R	UCC2897A
UCC2897ARGPR	ACTIVE	-40 to 125	1.20 | 1ku	QFN (RGP) | 20	3000 | LARGE T&R	2897A
UCC2897ARGPT	ACTIVE	-40 to 125	1.35 | 1ku	QFN (RGP) | 20	250 | SMALL T&R	2897A

UCC2897A 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
UCC2897APW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		UCC2897APW
UCC2897APWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		UCC2897APWR
UCC2897ARGPR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		UCC2897ARGPR
UCC2897ARGPT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		UCC2897ARGPT

UCC2897A 应用技术支持与电子电路设计开发资源下载

1. UCC2897A 数据资料 dataSheet 下载.PDF
2. TI 德州仪器AC/DC 和 DC/DC 电源产品选型与价格参考 . xls
3. Dual MOSFET Driver (PDF 498 KB)
4. 标准线性产品交叉参考 (Rev. D) (PDF 1058 KB)
5. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
6. 所选封装材料的热学和电学性质 (PDF 645 KB)
7. 高速数据转换 (PDF 1967 KB)
8. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
9. Analog-to-Digital Converter Grounding Practices Affect System Performance (PDF 56 KB)
10. Principles of Data Acquisition and Conversion (PDF 50 KB)
11. Interleaving Analog-to-Digital Converters (PDF 64 KB)
12. What Designers Should Know About Data Converter Drift (PDF 95 KB)
13. Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (PDF 70 KB)
14. Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (PDF 105 KB)

UCC2897A 工具与软件

名称	型号	公司	工具/软件类型
音频的快速搜索选择工具	AUDIO_SELECTION_TOOL	Texas Instruments	免费评估工具
UCC2897A 评估模块	UCC2897AEVM	Texas Instruments	开发电路板/EVM
用于音频转换器的软件驱动程序	CODECDRIVERS-SW	Texas Instruments	应用软件