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UC3843B PDF预览

UC3843B

更新时间: 2024-11-24 15:18:59
品牌 Logo 应用领域
华冠 - HGSEMI /
页数 文件大小 规格书
14页 883K
描述
电流型脉宽调制器

UC3843B 数据手册

 浏览型号UC3843B的Datasheet PDF文件第2页浏览型号UC3843B的Datasheet PDF文件第3页浏览型号UC3843B的Datasheet PDF文件第4页浏览型号UC3843B的Datasheet PDF文件第5页浏览型号UC3843B的Datasheet PDF文件第6页浏览型号UC3843B的Datasheet PDF文件第7页 
UC3842B/43B/44B/45B  
CURRENT MODE PWM CONTROLLER  
DESCRIPTION  
The UC3842B/43B/44B/45B are fixed frequency current mode PWM  
controller.  
They are specially designed for OFF Line and DC to DC converter  
applications with a minimal external components. Internally implemented  
circuits include a trimmed oscillator for precise duty cycle control, a  
temperature compensated reference, high gain error amplifier, current  
sensing comparator, and a high current totem pole output ideally  
suited for driving a power MOSFET. Protection circuitry includes built  
under voltage lockout and current limiting.  
DIP-8  
The UC3842B, UC3844B have UVLO thresholds of 16 V (on) and 10 V (off).  
The corresponding thresholds for the UC3843B, UC3845B are 8.4V (on)  
and 7.6V (off).  
SOP-8  
The UC3842B, UC3843B can operate within 100% duty cycle.  
The UC3844B, UC3845B can operate within 50% duty cycle.  
The UC3842B/43B/44B/45B is characterized for operation from TA = -40°C  
to 85°C.  
FEATURES  
Low Start-Up and Operating Current  
High Current Totem Pole Output  
Under voltage Lockout With Hysteresis  
Operating Frequency Up To 500KHz  
ORDERING INFORMATION  
DEVICE  
Package Type  
MARKING  
UC3842B  
UC3843B  
UC3844B  
UC3845B  
UC3842B  
UC3843B  
UC3844B  
UC3845B  
Packing  
TUBE  
TUBE  
TUBE  
TUBE  
REEL  
REEL  
REEL  
REEL  
Packing Qty  
UC3842BN  
DIP-8  
DIP-8  
DIP-8  
DIP-8  
SOP-8  
SOP-8  
SOP-8  
SOP-8  
2000pcs/box  
2000pcs/box  
2000pcs/box  
2000pcs/box  
2500pcs/reel  
2500pcs/reel  
2500pcs/reel  
2500pcs/reel  
UC3843BN  
UC3844BN  
UC3845BN  
UC3842BM/TR  
UC3843BM/TR  
UC3844BM/TR  
UC3845BM/TR  
http://www.hgsemi.com.cn  
2018 AUG  
1 / 14  

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1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8, HALOGEN AND LEAD FREE, PLASTI