UCC2889 脱机电源控制器

UCC2889 描述

The UCC3888 controller is optimized for use as an off-line, low-power, low-voltage, regulated bias supply. The unique circuit topology utilized in this device can be visualized as two cascaded flyback converters, each operating in the discontinuous mode, both driven from a single external power switch. The significant benefit of this approach is the ability to achieve voltage conversion ratios as high as 400 V to 2.7 V with no transformer and low internal losses.

The control algorithm utilized by the UCC3888 sets the switch on time inversely proportional to the input line voltage and sets the switch off time inversely proportional to the output voltage. This action is automatically controlled by an internal feedback loop and reference.

	UCC2889	UCC3888
Topology	Flyback	Flyback
Control Method	Voltage Mode	Voltage Mode
Duty Cycle(Max)(%)	55	55
Frequency(Max)(kHz)	250	250
UVLO Thresholds On/Off(V)	8.4/6.3	8.4/6.3
Pin/Package	8SOIC	8PDIP, 8SOIC
Regulated Outputs(#)	1	1
Operating Temperature Range(°C)	-40 to 85	0 to 70
Rating	Catalog	Catalog

UCC2889 特性

• Transformerless Off-Line Power Supply
• Wide 100-VDC to 400-VDC Allowable Input Range
• Fixed 5-VDC or Adjustable Low-Voltage Output
• Output Sinks 200 mA, Sources 150 mA Into a MOSFET Gate
• Uses Low-Cost SMD Inductors
• Short Circuit Protected
• Optional Isolation Capability

UCC2889 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
UCC2889D	ACTIVE	-40 to 105	0.35 | 1ku	SOIC (D) | 8	75 | TUBE	28811D
UCC2889DG4	ACTIVE	-40 to 105	0.35 | 1ku	SOIC (D) | 8	75 | TUBE	28811D

UCC2889 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
UCC2889D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM		UCC2889D
UCC2889DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	UCC2889DG4	UCC2889DG4

UCC2889 应用技术支持与电子电路设计开发资源下载

1. UCC2889 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)

UCC2889 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
UCC2889 评估模块	UCC2889EVM	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