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UCC2884D PDF预览

UCC2884D

更新时间： 2024-11-08 20:34:55
品牌 Logo 应用领域
德州仪器 - TI 信息通信管理开关光电二极管
页数 文件大小 规格书
12页 318K
描述
1A SWITCHING CONTROLLER, 750kHz SWITCHING FREQ-MAX, PDSO16, SO-8

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UCC2884D 技术参数

生命周期：Obsolete零件包装代码：SOIC
包装说明：SOP, SOP16,.25针数：16
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.24
模拟集成电路 - 其他类型：SWITCHING CONTROLLER控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：12 V
最小输入电压：10 V标称输入电压：11 V
JESD-30 代码：R-PDSO-G16功能数量：1
端子数量：16最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：1 A
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP16,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE认证状态：Not Qualified
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK-BOOST最大切换频率：750 kHz
技术：BICMOS温度等级：INDUSTRIAL
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUALBase Number Matches：1

UCC2884D 数据手册

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UCC2884  
UCC3884  
www.ti.com  
SLUS160B–AUGUST 1999–REVISED AUGUST 2007  
Frequency Foldback Current Mode PWM Controller  
1
FEATURES  
DESCRIPTION  
•
Frequency Foldback Reduces Operating  
Frequency Under Fault Conditions  
The UCC3884 is a high performance current mode  
PWM controller intended for single ended switch  
mode power supplies. The chip implements  
•
•
•
•
•
•
Accurate Programmable Volt-Second Clamp  
Programmable Maximum Duty Cycle Clamp  
Oscillator Synchronization  
a
frequency foldback scheme that decreases the  
oscillator frequency as the output voltage falls below  
a programmed value. This technique decreases the  
average output current sourced into a low impedance  
load which can occur during an output short circuit or  
overload condition. Excessive short circuit current is  
more prevalent in high frequency converters where  
the propagation delay and switch turn-off time forces  
Overcurrent Protection  
Shutdown With Full Soft Start  
Wide Gain Bandwidth Amplifier (GBW > 2.5  
MHz)  
•
•
Current Mode Operation  
Precision 5-V Reference  
a
minimum attainable duty cycle. An accurate  
volt-second clamp limits the duty cycle during line or  
load transient conditions which could otherwise  
saturate the transformer. The volt-second clamp may  
also be used with an external overvoltage protection  
circuit to handle fault conditions such as current  
sense disconnect or current transformer saturation.  
The frequency foldback, volt-second clamp,  
cycle-by-cycle current limit, and overcurrent shutdown  
provide a rich set of protection features for use in  
peak current-mode pulse width modulators.  
OSCILLATOR SYNCHRONIZATION  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 1999–2007, Texas Instruments Incorporated  
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