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UC1849QTR PDF预览

UC1849QTR

更新时间： 2024-01-09 02:43:26
品牌 Logo 应用领域
其他 - ETC 模拟IC
页数 文件大小 规格书
11页 579K
描述
Analog IC

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UC1849QTR 技术参数

生命周期：Obsolete包装说明：,
Reach Compliance Code：unknown风险等级：5.84
Base Number Matches：1

UC1849QTR 数据手册

 浏览型号UC1849QTR的Datasheet PDF文件第2页浏览型号UC1849QTR的Datasheet PDF文件第3页浏览型号UC1849QTR的Datasheet PDF文件第4页浏览型号UC1849QTR的Datasheet PDF文件第5页浏览型号UC1849QTR的Datasheet PDF文件第6页浏览型号UC1849QTR的Datasheet PDF文件第7页 
UC1849  
UC2849  
UC3849  
Secondary Side Average Current Mode Controller  
FEATURES  
DESCRIPTION  
The UC1849 family of average current mode controllers accurately accom-  
plishes secondary side average current mode control. The secondary side  
output voltage is regulated by sensing the output voltage and differentially  
sensing the AC switching current. The sensed output voltage drives a volt-  
age error amplifier.The AC switching current, monitored by a current sense  
resistor, drives a high bandwidth, low offset current sense amplifier. The  
outputs of the voltage error amplifier and current sense amplifier differential-  
ly drive a high bandwidth, integrating current error amplifier. The sawtooth  
waveform at the current error amplifier output is the amplified and inverted  
inductor current sensed through the resistor. This inductor current down-  
slope compared to the PWM ramp achieves slope compensation, which  
gives an accurate and inherent fast transient response to changes in load.  
•
Practical Secondary Side Control  
of Isolated Power Supplies  
•
•
1MHz Operation  
Differential AC Switching Current  
Sensing  
•
•
Accurate Programmable  
Maximum Duty Cycle  
Multiple Chips Can be  
Synchronized to Fastest  
Oscillator  
•
•
Wide Gain Bandwidth Product  
(70MHz, Acl>10) Current Error  
and Current Sense Amplifiers  
The UC1849 features load share, oscillator synchronization, undervoltage  
lockout, and programmable output control. Multiple chip operation can be  
achieved by connecting up to ten UC1849 chips in parallel.The SHARE bus  
and CLKSYN bus provide load sharing and synchronization to the fastest  
oscillator respectively. The UC1849 is an ideal controller to achieve high  
power, secondary side average current mode control.  
Up to Ten Devices Can Easily  
Share a Common Load  
BLOCK DIAGRAM  
Pin numbers refer to 24-pin packages.  
UDG-94110  
7/95  
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