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UC2851DWTRG4 PDF预览

UC2851DWTRG4

更新时间: 2024-11-04 15:55:51
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
11页 761K
描述
0.4A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO18, SOIC-18

UC2851DWTRG4 技术参数

是否无铅:不含铅是否Rohs认证:符合
生命周期:Obsolete零件包装代码:SOIC
包装说明:SOIC-18针数:18
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.23
Is Samacsys:N其他特性:CURRENT MODE OPERATION IS ALSO POSSIBLE
模拟集成电路 - 其他类型:SWITCHING CONTROLLER控制模式:VOLTAGE-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:30 V
最小输入电压:8 V标称输入电压:20 V
JESD-30 代码:R-PDSO-G18长度:11.55 mm
功能数量:1端子数量:18
最高工作温度:85 °C最低工作温度:-40 °C
最大输出电流:0.4 A封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP18,.4
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):NOT SPECIFIED认证状态:Not Qualified
座面最大高度:2.65 mm子类别:Switching Regulator or Controllers
表面贴装:YES切换器配置:SINGLE
最大切换频率:500 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:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:7.5 mm
Base Number Matches:1

UC2851DWTRG4 数据手册

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UC1851  
UC2851  
UC3851  
Programmable, Off-Line, PWM Controller  
FEATURES  
DESCRIPTION  
All Control, Driving, Monitoring, and Protection  
Functions Included  
The UC1851 family of PWM controllers are optimized for off-  
line primary side control. These devices include a high current  
totem pole output stage and a toggle flip-flop for absolute 50%  
duty cycle limiting. In all other respects this line of controllers is  
pin for pin compatible with the UC1841 series. Inclusion of all  
major housekeeping functions in these high performance con-  
trollers makes them ideal for use in cost sensitive applications.  
Low-Current Off Line Start Circuit  
Voltage Feed Forward or Current Mode Control  
High Current Totem Pole Output  
50% Absolute Max Duty Cycle  
Important features of these controllers include low current  
start-up, linear feed-forward for constant volt-second operation,  
and compatibility with both voltage or current mode control. In  
addition, these devices include a programmable start thresh-  
old, as well as programmable over-voltage, under-voltage, and  
over current fault thresholds. The fault latch on these devices  
can be configured for automatic restart, or latched off response  
to a fault.  
PWM Latch for Single Pulse Per Period  
Pulse-by-Pulse Current Limiting plus Shutdown  
for Over-Current Fault  
No Start-Up or Shutdown Transients  
Slow Turn-On Both Initially and After Fault  
Shutdown  
These devices are packaged in 18-pin plastic or ceramic dual-  
in-line packages, or for surface mount applications, a 20 Pin  
PLCC. The UC1851 is characterized for -55°C to +125°C op-  
eration while the UC2851 and UC3851 are designed for -40°C  
to +85°C and 0°C to +70°C, respectively.  
Shutdown Upon Over or Under Voltage Sensing  
Latch Off or Continuous Retry After Fault  
1% Reference Accuracy  
500kHz Operation  
18 Pin DIL or 20 Pin PLCC Package  
BLOCK DIAGRAM  
10/94  

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