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UC2845A PDF预览

UC2845A

更新时间: 2024-11-03 21:56:07
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
页数 文件大小 规格书
7页 519K
描述
Current Mode PWM Controller

UC2845A 技术参数

生命周期:ObsoleteReach Compliance Code:unknown
风险等级:5.7Is Samacsys:N
Base Number Matches:1

UC2845A 数据手册

 浏览型号UC2845A的Datasheet PDF文件第2页浏览型号UC2845A的Datasheet PDF文件第3页浏览型号UC2845A的Datasheet PDF文件第4页浏览型号UC2845A的Datasheet PDF文件第5页浏览型号UC2845A的Datasheet PDF文件第6页浏览型号UC2845A的Datasheet PDF文件第7页 
UC1842A/3A/4A/5A  
UC2842A/3A/4A/5A  
UC3842A/3A/4A/5A  
Current Mode PWM Controller  
FEATURES  
DESCRIPTION  
Optimized for Off-line and DC to DC  
The UC1842A/3A/4A/5A family of control ICs is a pin for pin compat-  
ible improved version of the UC3842/3/4/5 family. Providing the nec-  
essary features to control current mode switched mode power  
supplies, this family has the following improved features. Start up cur-  
rent is guaranteed to be less than 0.5mA. Oscillator discharge is  
trimmed to 8.3mA. During under voltage lockout, the output stage can  
sink at least 10mA at less than 1.2V for VCC over 5V.  
Converters  
Low Start Up Current (<0.5mA)  
Trimmed Oscillator Discharge Current  
Automatic Feed Forward Compensation  
Pulse-by-Pulse Current Limiting  
Enhanced Load Response Characteristics  
Under-Voltage Lockout With Hysteresis  
Double Pulse Suppression  
The difference between members of this family are shown in the table  
below.  
Maximum Duty  
Part #  
UVLO On  
UVLO Off  
Cycle  
<100%  
<100%  
<50%  
High Current Totem Pole Output  
Internally Trimmed Bandgap Reference  
500kHz Operation  
UC1842A  
UC1843A  
UC1844A  
UC1845A  
16.0V  
8.5V  
10.0V  
7.9V  
16.0V  
8.5V  
10.0V  
7.9V  
<50%  
Low RO Error Amp  
BLOCK DIAGRAM  
A/B  
Note 1:  
A = DIL-8 Pin Number. B = SO-14 Pin Number.  
Note 2: Toggle flip flop used only in 1844A and 1845A.  
9/94  

UC2845A 替代型号

型号 品牌 替代类型 描述 数据表
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