UC3824 高速 PWM 控制器

UC3824 描述

The UC1824 family of PWM control devices is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current mode or voltage mode systems with the capability for input voltage feed-forward.

Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and a soft-start pin which doubles as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800 mV of hysteresis assures low start up current.

	UC2824	UC3824
Topology	Boost	Boost, Buck
Control Method	Current Mode	Current Mode, Voltage Mode
Duty Cycle(Max)(%)	100	100
Frequency(Max)(kHz)	1000	1000
UVLO Thresholds On/Off(V)	9.2/8.4	9.2/8.4
Pin/Package	16PDIP, 16SOIC, 20PLCC	16PDIP, 16SOIC
Regulated Outputs(#)	2	2
Operating Temperature Range(°C)	-40 to 85	0 to 70
Rating	Catalog	Catalog

UC3824 特性

• Complementary Outputs
• Practical Operation Switching Frequenciesto 1 MHz
• 50-ns Propagation Delay to Output
• High Current Dual Totem Pole Outputs (1.5 A Peak)
• Wide Bandwidth Error Amplifier
• Fully Latched Logic With Double Pulse Suppression
• Pulse-by-Pulse Current Limiting
• Soft Start/Maximum Duty Cycle Control
• Under-Voltage Lockout with Hysteresis
• Low Start Up Current (1.1 mA)
• Trimmed Bandgap Reference (5.1 V ± 1%)

UC3824 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
UC3824DW	ACTIVE	0 to 70	6.75 | 1ku	SOIC (DW) | 16	40 | TUBE	UC3824DW
UC3824DWG4	ACTIVE	0 to 70	6.75 | 1ku	SOIC (DW) | 16	40 | TUBE	UC3824DW
UC3824DWTR	ACTIVE	0 to 70	6.10 | 1ku	SOIC (DW) | 16	2000 | LARGE T&R	UC3824DW
UC3824DWTRG4	ACTIVE	0 to 70	6.10 | 1ku	SOIC (DW) | 16	2000 | LARGE T&R	UC3824DW
UC3824N	ACTIVE	0 to 70	6.75 | 1ku	PDIP (N) | 16	25 | TUBE	UC3824N
UC3824NG4	ACTIVE	0 to 70	6.75 | 1ku	PDIP (N) | 16	25 | TUBE	UC3824N

UC3824 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
UC3824DW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		UC3824DW
UC3824DWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	UC3824DWG4	UC3824DWG4
UC3824DWTR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR		UC3824DWTR
UC3824DWTRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	UC3824DWTRG4	UC3824DWTRG4
UC3824N	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type		UC3824N
UC3824NG4	Green (RoHS & no Sb/Br)	CU NIPDAU	N/A for Pkg Type	UC3824NG4	UC3824NG4

UC3824 应用技术支持与电子电路设计开发资源下载

1. UC3824 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)

UC3824 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
UC3824 评估模块	UC3824EVM	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