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UCC2884N PDF预览

UCC2884N

更新时间: 2024-11-27 02:58:39
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
8页 269K
描述
Frequency Foldback Current Mode PWM Controller

UCC2884N 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:DIP包装说明:DIP, DIP16,.3
针数:16Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.79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 VJESD-30 代码:R-PDIP-T16
JESD-609代码:e0长度:19.3 mm
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:DIP封装等效代码:DIP16,.3
封装形状:RECTANGULAR封装形式:IN-LINE
峰值回流温度(摄氏度):NOT SPECIFIED认证状态:Not Qualified
座面最大高度:5.33 mm子类别:Switching Regulator or Controllers
表面贴装:NO切换器配置:BUCK-BOOST
最大切换频率:750 kHz技术:BICMOS
温度等级:INDUSTRIAL端子面层:Tin/Lead (Sn/Pb)
端子形式:THROUGH-HOLE端子节距:2.54 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:7.62 mm

UCC2884N 数据手册

 浏览型号UCC2884N的Datasheet PDF文件第2页浏览型号UCC2884N的Datasheet PDF文件第3页浏览型号UCC2884N的Datasheet PDF文件第4页浏览型号UCC2884N的Datasheet PDF文件第5页浏览型号UCC2884N的Datasheet PDF文件第6页浏览型号UCC2884N的Datasheet PDF文件第7页 
application  
INFO  
UCC1884  
UCC2884  
available  
UCC3884  
PRELIMINARY  
Frequency Foldback Current Mode PWM Controller  
FEATURES  
DESCRIPTION  
Frequency Foldback Reduces  
Operating Frequency Under Fault  
Conditions  
The UCC3884 is a high performance current mode PWM controller in-  
tended for single ended switch mode power supplies. The chip implements  
a frequency foldback scheme that decreases the oscillator frequency as  
the output voltage falls below a programmed value. This technique de-  
creases the average output current sourced into a low impedance load  
which can occur during an output short circuit or overload condition. Ex-  
cessive short circuit current is more prevalent in high frequency converters  
where the propagation delay and switch turn-off time forces a minimum at-  
tainable 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.  
Accurate Programmable Volt-Second  
Clamp  
Programmable Maximum Duty Cycle  
Clamp  
Oscillator Synchronization  
Overcurrent Protection  
Shutdown with Full Soft Start  
Wide Gain Bandwidth Amplifier  
(GBW > 2.5MHz)  
Current Mode Operation  
Precision 5V Reference  
BLOCK DIAGRAM  
UDG-96026-1  
SLUS160A - AUGUST 1999  

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