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UC3849DWTR PDF预览

UC3849DWTR

更新时间: 2024-11-23 17:01:27
品牌 Logo 应用领域
德州仪器 - TI 开关光电二极管
页数 文件大小 规格书
16页 622K
描述
0.3A SWITCHING CONTROLLER, 550kHz SWITCHING FREQ-MAX, PDSO24, GREEN, PLASTIC, SOIC-24

UC3849DWTR 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Obsolete零件包装代码:SOIC
包装说明:GREEN, PLASTIC, SOIC-24针数:24
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.17
Is 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:20 V最小输入电压:8 V
标称输入电压:12 VJESD-30 代码:R-PDSO-G24
长度:15.4 mm功能数量:1
端子数量:24最高工作温度:70 °C
最低工作温度:最大输出电流:0.3 A
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP24,.4封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified座面最大高度:2.65 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:SINGLE最大切换频率:550 kHz
技术:BIPOLAR温度等级:COMMERCIAL
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:7.5 mmBase Number Matches:1

UC3849DWTR 数据手册

 浏览型号UC3849DWTR的Datasheet PDF文件第2页浏览型号UC3849DWTR的Datasheet PDF文件第3页浏览型号UC3849DWTR的Datasheet PDF文件第4页浏览型号UC3849DWTR的Datasheet PDF文件第5页浏览型号UC3849DWTR的Datasheet PDF文件第6页浏览型号UC3849DWTR的Datasheet PDF文件第7页 
application  
INFO  
UC2849  
UC3849  
available  
Secondary Side Average Current Mode Controller  
FEATURES  
DESCRIPTION  
Practical Secondary Side Control of  
Isolated Power Supplies  
The UC3849 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 differen-  
tially 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.  
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 UC3849 features load share, oscillator synchronization, undervoltage  
lockout, and programmable output control. Multiple chip operation can be  
achieved by connecting up to ten UC3849 chips in parallel. The SHARE  
bus and CLKSYN bus provide load sharing and synchronization to the fast-  
est oscillator respectively. The UC3849 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  
SLUS360A - JULY 1995 - REVISED JUNE 2003  

UC3849DWTR 替代型号

型号 品牌 替代类型 描述 数据表
UC3849DW TI

完全替代

0.3A SWITCHING CONTROLLER, 550kHz SWITCHING FREQ-MAX, PDSO24, GREEN, PLASTIC, SOIC-24

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