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UC2844N PDF预览

UC2844N

更新时间: 2024-02-27 18:51:58
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光电二极管
页数 文件大小 规格书
19页 934K
描述
Current Mode PWM Controller

UC2844N 技术参数

生命周期:Obsolete包装说明:DFP, FL14,.25
Reach Compliance Code:unknown风险等级:5.84
Is Samacsys:N控制模式:CURRENT-MODE
JESD-30 代码:R-XDFP-F14端子数量:14
最高工作温度:85 °C最低工作温度:-40 °C
最大输出电流:0.2 A封装主体材料:CERAMIC
封装代码:DFP封装等效代码:FL14,.25
封装形状:RECTANGULAR封装形式:FLATPACK
认证状态:Not Qualified子类别:Switching Regulator or Controllers
表面贴装:YES最大切换频率:500 kHz
技术:BIPOLAR温度等级:INDUSTRIAL
端子形式:FLAT端子节距:1.27 mm
端子位置:DUALBase Number Matches:1

UC2844N 数据手册

 浏览型号UC2844N的Datasheet PDF文件第2页浏览型号UC2844N的Datasheet PDF文件第3页浏览型号UC2844N的Datasheet PDF文件第4页浏览型号UC2844N的Datasheet PDF文件第5页浏览型号UC2844N的Datasheet PDF文件第6页浏览型号UC2844N的Datasheet PDF文件第7页 
UC1842/3/4/5  
UC2842/3/4/5  
UC3842/3/4/5  
Current Mode PWM Controller  
FEATURES  
DESCRIPTION  
Optimized For Off-line And DC  
To DC Converters  
The UC1842/3/4/5 family of control ICs provides the necessary features to  
implement off-line or DC to DC fixed frequency current mode control schemes  
with a minimal external parts count. Internally implemented circuits include  
under-voltage lockout featuring start up current less than 1mA, a precision  
reference trimmed for accuracy at the error amp input, logic to insure latched  
operation, a PWM comparator which also provides current limit control, and a  
totem pole output stage designed to source or sink high peak current. The  
output stage, suitable for driving N Channel MOSFETs, is low in the off state.  
Low Start Up Current (<1mA)  
Automatic Feed Forward  
Compensation  
Pulse-by-pulse Current Limiting  
Enhanced Load Response  
Characteristics  
Differences between members of this family are the under-voltage lockout  
thresholds and maximum duty cycle ranges. The UC1842 and UC1844 have  
UVLO thresholds of 16V (on) and 10V (off), ideally suited to off-line  
applications. The corresponding thresholds for the UC1843 and UC1845 are  
8.4V and 7.6V. The UC1842 and UC1843 can operate to duty cycles  
approaching 100%. A range of zero to 50% is obtained by the UC1844 and  
UC1845 by the addition of an internal toggle flip flop which blanks the output  
off every other clock cycle.  
Under-voltage Lockout With  
Hysteresis  
Double Pulse Suppression  
High Current Totem Pole  
Output  
Internally Trimmed Bandgap  
Reference  
500khz Operation  
Low RO Error Amp  
BLOCK DIAGRAM  
A/B  
Note 1:  
Note 2:  
A = DIL-8 Pin Number. B = SO-14 and CFP-14 Pin Number.  
Toggle flip flop used only in 1844 and 1845.  
SLUS223A - APRIL 1997 - REVISED MAY 2002  

UC2844N 替代型号

型号 品牌 替代类型 描述 数据表
UC2843N TI

完全替代

Current Mode PWM Controller
UC2843D8 TI

完全替代

Current Mode PWM Controller
UC2844D8TR TI

完全替代

Current Mode PWM Controller

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