UCC2894 电流模式有源钳位 PWM 控制器

UCC2894 描述

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.

	UCC2891	UCC2892	UCC2893	UC2894
Topology	Flyback, Forward	Flyback, Forward	Flyback, Forward	Flyback, Forward
Control Method	Current Mode	Current Mode	Current Mode	Current Mode
Frequency(Max)(kHz)	1000	1000	1000	1000
UVLO Thresholds On/Off(V)	13.0/8.0	13.0/8.0	13.0/8.0	13.0/8.0
Pin/Package	16SOIC, 16TSSOP	16SOIC, 16TSSOP	16SOIC, 16TSSOP	16SOIC, 16TSSOP
Regulated Outputs(#)	1	1	1	1
Operating Temperature Range(°C)	-40 to 85	-40 to 105,-40 to 85	-40 to 105,-40 to 85	-40 to 85
Rating	Catalog	Catalog	Catalog	Catalog

UCC2894 特性

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 UCC2894/3
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

UCC2894 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
UCC2894D	ACTIVE	-40 to 85	1.55 \| 1ku	SOIC (D) \| 16	40 \| TUBE	UCC2894
UCC2894DG4	ACTIVE	-40 to 85	1.55 \| 1ku	SOIC (D) \| 16	40 \| TUBE	UCC2894
UCC2894DR	ACTIVE	-40 to 85	1.20 \| 1ku	SOIC (D) \| 16	2500 \| LARGE T&R	UCC2894
UCC2894DRG4	ACTIVE	-40 to 85	1.20 \| 1ku	SOIC (D) \| 16	2500 \| LARGE T&R	UCC2894
UCC2894PW	ACTIVE	-40 to 85	1.30 \| 1ku	TSSOP (PW) \| 16	90 \| TUBE	UCC2894
UCC2894PWG4	ACTIVE	-40 to 85	1.30 \| 1ku	TSSOP (PW) \| 16	90 \| TUBE	UCC2894
UCC2894PWR	ACTIVE	-40 to 85	1.20 \| 1ku	TSSOP (PW) \| 16	2000 \| LARGE T&R	UCC2894
UCC2894PWRG4	ACTIVE	-40 to 85	1.20 \| 1ku	TSSOP (PW) \| 16	2000 \| LARGE T&R	UCC2894

UCC2894 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
UCC2894D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		UCC2894D
UCC2894DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	UCC2894DG4	UCC2894DG4
UCC2894DR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		UCC2894DR
UCC2894DRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	UCC2894DRG4	UCC2894DRG4
UCC2894PW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		UCC2894PW
UCC2894PWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	UCC2894PWG4	UCC2894PWG4
UCC2894PWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		UCC2894PWR
UCC2894PWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	UCC2894PWRG4	UCC2894PWRG4

UCC2894 应用技术支持与电子电路设计开发资源下载

UCC2894 数据资料 dataSheet 下载.PDF
TI 德州仪器AC/DC 和 DC/DC 电源产品选型与价格参考 . xls
Dual MOSFET Driver (PDF 498 KB)
标准线性产品交叉参考 (Rev. D) (PDF 1058 KB)
模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
所选封装材料的热学和电学性质 (PDF 645 KB)
高速数据转换 (PDF 1967 KB)
Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
Analog-to-Digital Converter Grounding Practices Affect System Performance (PDF 56 KB)
Principles of Data Acquisition and Conversion (PDF 50 KB)
Interleaving Analog-to-Digital Converters (PDF 64 KB)
What Designers Should Know About Data Converter Drift (PDF 95 KB)
Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (PDF 70 KB)
Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (PDF 105 KB)

UCC2894 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
UCC2894 评估模块	UCC2894EVM	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