UC3886 平均电流模式 PWM 控制器 IC

	UC3886
Topology	Boost, Buck, Flyback, Forward
Control Method	Current Mode
Duty Cycle(Max)(%)	95
Frequency(Max)(kHz)	400
UVLO Thresholds On/Off(V)	10.3/10
Pin/Package	16PDIP, 16SOIC
Regulated Outputs(#)	1
Operating Temperature Range(°C)	0 to 70
Rating	Catalog

UC3886 描述

The UC3886 family of PWM controller ICs is designed for DC-to-DC converters with average current mode control. It is designed for use in conjunction with the UC3910 4-bit DAC and Voltage Monitor. The UC3886 drives an external N-channel MOSFET and can be used to power the Intel Pentium\xAE Pro and other high-end microprocessors.

The UC3886 in conjunction with the UC3910 converts 5VDC to an adjustable output ranging from 2.0V to 3.5V in 100mV steps with 35mV DC system accuracy.

The oscillator is programmed by the user\x92s selection of an external resistor and capacitor, and is designed for 300kHz typical operation.

The voltage and current amplifiers have 3.5MHz gain-bandwidth product to satisfy high performance system requirements.

UC3886 特性

• 10.3V - 20V Operating Range
• Low Offset Voltage Amplifier
• High Bandwidth Current and Voltage Amplifiers
• Low Offset Current Sense Amplifier
• Undervoltage Lockout
• Trimmed 5 Volt Reference
• Externally Programmable Oscillator Charge Current
• 1.5A Peak Totem Pole Output
• Available in 16-pin DIL or SOIC Packages

UC3886 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
UC3886DW	ACTIVE	0 to 70	1.90 | 1ku	SOIC (DW) | 16	40 | TUBE	UC3886DW
UC3886DWG4	ACTIVE	0 to 70	1.90 | 1ku	SOIC (DW) | 16	40 | TUBE	UC3886DW
UC3886N	ACTIVE	0 to 70	1.90 | 1ku	PDIP (N) | 16	25 | TUBE	UC3886N
UC3886NG4	ACTIVE	0 to 70	1.90 | 1ku	PDIP (N) | 16	25 | TUBE	UC3886N

UC3886 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
UC3886DW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		UC3886DW
UC3886DWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	UC3886DWG4	UC3886DWG4
UC3886N	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type		UC3886N
UC3886NG4	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type	UC3886NG4	UC3886NG4

UC3886 应用技术支持与电子电路设计开发资源下载

1. UC3886 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)

UC3886 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
UC3886 评估模块	UC3886EVM	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