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UC3843D8 PDF预览

UC3843D8

更新时间: 2024-10-31 22:59:31
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信息通信管理
页数 文件大小 规格书
19页 934K
描述
Current Mode PWM Controller

UC3843D8 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:SOIC
包装说明:SOIC-8针数:8
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01Factory Lead Time:1 week
风险等级:0.64Is Samacsys:N
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:25 V
最小输入电压:8.2 V标称输入电压:15 V
JESD-30 代码:R-PDSO-G8JESD-609代码:e4
长度:4.9 mm湿度敏感等级:1
功能数量:1端子数量:8
最高工作温度:70 °C最低工作温度:
最大输出电流:1 A标称输出电压:5 V
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP8,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:1.58 mm
子类别:Switching Regulator or Controllers最大供电电流 (Isup):25 mA
表面贴装:YES切换器配置:BUCK-BOOST
最大切换频率:500 kHz技术:BICMOS
温度等级:COMMERCIAL端子面层:Nickel/Palladium/Gold (Ni/Pd/Au)
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:3.91 mmBase Number Matches:1

UC3843D8 数据手册

 浏览型号UC3843D8的Datasheet PDF文件第2页浏览型号UC3843D8的Datasheet PDF文件第3页浏览型号UC3843D8的Datasheet PDF文件第4页浏览型号UC3843D8的Datasheet PDF文件第5页浏览型号UC3843D8的Datasheet PDF文件第6页浏览型号UC3843D8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  

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