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UC1841L PDF预览

UC1841L

更新时间： 2024-11-04 12:16:55
品牌 Logo 应用领域
德州仪器 - TI 稳压器开关式稳压器或控制器电源电路开关式控制器信息通信管理
页数 文件大小 规格书
11页 942K
描述
Programmable, Off-Line, PWM Controller

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中文翻译

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UC1841L 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：QLCC
包装说明：CERAMIC, LCC-20针数：20
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.77
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：CURRENT-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：S-CQCC-N20长度：8.89 mm
功能数量：1端子数量：20
最高工作温度：125 °C最低工作温度：-55 °C
最大输出电流：1 A封装主体材料：CERAMIC, METAL-SEALED COFIRED
封装代码：QCCN封装等效代码：LCC20,.35SQ
封装形状：SQUARE封装形式：CHIP CARRIER
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：2.54 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：MILITARY端子形式：NO LEAD
端子节距：1.27 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：8.89 mm
Base Number Matches：1

UC1841L 数据手册

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UC1841  
UC2841  
UC3841  
Programmable, Off-Line, PWM Controller  
FEATURES  
DESCRIPTION  
•
All Control, Driving, Monitoring, and  
Protection Functions Included  
The UC1841 family of PWM controllers has been designed to increase  
the level of versatility while retaining all of the performance features of  
the earlier UC1840 devices. While still optimized for highly-efficient boot-  
strapped primary-side operation in forward or flyback power converters,  
the UC1841 is equally adept in implementing both low and high voltage  
input DC to DC converters. Important performance features include a  
low-current starting circuit, linear feed-forward for constant volt-second  
operation, and compatibility with either voltage or current mode topologies.  
•
•
Low-current, Off-line Start Circuit  
Voltage Feed Forward or Current  
Mode Control  
•
•
•
Guaranteed Duty Cycle Clamp  
PWM Latch for Single Pulse per Period  
In addition to start-up and normal regulating PWM functions, these de-  
vices include built in protection from over-voltage, under-voltage, and  
over-current fault conditions with the option for either latch-off or automat-  
ic restart.  
Pulse-by-Pulse Current Limiting Plus  
Shutdown for Over-Current Fault  
•
•
No Start-up or Shutdown Transients  
While pin compatible with the UC1840 in all respects except that the po-  
larity of the External Stop has been reversed, the UC1841 offers the fol-  
lowing improvements:  
Slow Turn-on Both Initially and After  
Fault Shutdown  
•
•
•
Shutdown Upon Over- or  
Under-Voltage Sensing  
1. Fault latch reset is accomplished with slow start discharge rather  
than recycling the input voltage to the chip.  
Latch Off or Continuous Retry After  
Fault  
2. The External Stop input can be used for a fault delay to resist  
shutdown from short duration transients.  
PWM Output Switch Usable to 1A  
Peak Current  
3. The duty-cycle clamping function has been characterized and  
specified.  
•
•
•
1% Reference Accuracy  
500kHz Operation  
The UC1841 is characterized for -55°C to +125°C operation while the  
UC2841 and UC3841 are designed for -25°C to +85°C and 0°to +70°C,  
respectively.  
18 Pin DIL Package  
BLOCK DIAGRAM  
Note: Positive true logic, latch outputs high with set, reset has priority.  
6/93  
1234567...11

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UC1841L 替代型号

型号 品牌 替代类型 描述 数据表
UC1841L883B TI

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