UC2852 高功率因数前置稳压器

UC2852 描述

The UC1852 provides a low-cost solution to active power-factor correction (PFC) for systems that would otherwise draw high peak current pulses from AC power lines. This circuit implements zero-current switched boost conversion, producing sinusoidal input currents with a minimum of external components, while keeping peak current substantially below that of fully-discontinuous converters.

The UC1852 provides controlled switch on-time to regulate the output bulk DC voltage, an off-time defined by the boost inductor, and a zero-current sensing circuit to reactivate the switch cycle. Even though switching frequency varies with both load and instantaneous line voltage, it can be maintained within a reasonable range to minimize noise generation.

	UC2852	UC3852
UVLO Thresholds On/Off(V)	16.3/11.5	16.3/11.5
Operating Supply(Max)(V)	30	30
Startup Current(mA)	0.4	0.4
Operating Supply Current(mA)	6	6
Duty Cycle(Max)(%)	95	95
Practical Operating Frequency(Max)(MHz)	0.2	0.2
Pin/Package	8PDIP, 8SOIC	8PDIP, 8SOIC
Rating	Catalog	Catalog

UC2852 特性

• Low-Cost Power Factor Correction
• Power Factor Greater Than 0.99
• Few External Parts Required
• Controlled On-Time Boost PWM
• Zero-Current Switching
• Limited Peak Current
• Min and Max Frequency Limits
• Starting Current Less Than 1mA
• High-Current FET Drive Output
• Under-Voltage Lockout

UC2852 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
UC2852D	ACTIVE	-40 to 85	2.30 | 1ku	SOIC (D) | 8	75 | TUBE	UC2852D
UC2852DG4	ACTIVE	-40 to 85	2.30 | 1ku	SOIC (D) | 8	75 | TUBE	UC2852D
UC2852DTR	ACTIVE	-40 to 85	1.90 | 1ku	SOIC (D) | 8	2500 | LARGE T&R	UC2852D
UC2852DTRG4	ACTIVE	-40 to 85	1.90 | 1ku	SOIC (D) | 8	2500 | LARGE T&R	UC2852D
UC2852N	ACTIVE	-40 to 85	2.30 | 1ku	PDIP (N) | 8	50 | TUBE	UC2852N
UC2852NG4	ACTIVE	-40 to 85	2.30 | 1ku	PDIP (N) | 8	50 | TUBE	UC2852N

UC2852 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
UC2852D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		UC2852D
UC2852DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	UC2852DG4	UC2852DG4
UC2852DTR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		UC2852DTR
UC2852DTRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	UC2852DTRG4	UC2852DTRG4
UC2852N	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type		UC2852N
UC2852NG4	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type	UC2852NG4	UC2852NG4

UC2852 应用技术支持与电子电路设计开发资源下载

1. UC2852 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)

UC2852 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
UC2852 评估模块	UC2852EVM	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