UC3525B 稳压脉宽调制器

UC3525B 描述

The UC1525B/1527B series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip +5.1V buried zener reference is trimmed to ±0.75% and the input common-mode range of the error amplifier includes the reference voltage, eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead time adjustment. These devices also feature built-in soft-start circuitry with only an external timing capacitor required.

	UC1525B	UC2525B	UC3525B
Topology	Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull	Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull	Boost, Buck, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull
Control Method	Voltage Mode	Voltage Mode	Voltage Mode
Duty Cycle(Max)(%)	50	50	50
Frequency(Max)(kHz)	450	450	450
UVLO Thresholds On/Off(V)	7/6.8	7/6.8	7/6.8
Pin/Package	16CDIP	16SOIC	16PDIP, 16SOIC
Regulated Outputs(#)	2	2	2
Operating Temperature Range(°C)	-55 to 125	-40 to 85	0 to 70
Rating	Military	Catalog	Catalog

UC3525B 特性

• 8 to 35V Operation
• 5.1V Buried Zener Reference Trimmed to ±0.75%
• 100Hz to 500kHz Oscillator Range
• Separate Oscillator Sync Terminal
• Adjustable Deadtime Control
• Internal Soft-Start
• Pulse-by-Pulse Shutdown
• Input Undervoltage Lockout with Hysteresis
• Latching PWM to Prevent Multiple Pulses
• Dual Source/Sink Output Drivers
• Low Cross Conduction Output Stage
• Tighter Reference Specifications

UC3525B 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
UC3525BDWTR	ACTIVE	-40 to 85	2.35 | 1ku	SOIC (DW) | 16	2000 | LARGE T&R	UC3525BDW
UC3525BDWTRG4	ACTIVE	-40 to 85	2.35 | 1ku	SOIC (DW) | 16	2000 | LARGE T&R	UC3525BDW

UC3525B 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
UC3525BDWTR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		UC3525BDWTR
UC3525BDWTRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	UC3525BDWTRG4	UC3525BDWTRG4

UC3525B 应用技术支持与电子电路设计开发资源下载

1. UC3525B 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)

UC3525B 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
UC3525B 评估模块	UC3525BEVM	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