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UC3849NG4 PDF预览

UC3849NG4

更新时间: 2024-11-26 14:45:23
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
21页 526K
描述
IC 0.3 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDIP24, PLASTIC, DIP-24, Switching Regulator or Controller

UC3849NG4 技术参数

是否Rohs认证: 符合生命周期:Obsolete
零件包装代码:DIP包装说明:DIP, DIP24,.6
针数:24Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.64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-PDIP-T24
长度:31.75 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:DIP
封装等效代码:DIP24,.6封装形状:RECTANGULAR
封装形式:IN-LINE峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified座面最大高度:5.08 mm
子类别:Switching Regulator or Controllers表面贴装:NO
切换器配置:SINGLE最大切换频率:1000 kHz
技术:BIPOLAR温度等级:COMMERCIAL
端子形式:THROUGH-HOLE端子节距:2.54 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:15.24 mmBase Number Matches:1

UC3849NG4 数据手册

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UC2849  
UC3849  
www.ti.com  
SLUS360CJULY 1995REVISED AUGUST 2007  
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 accomplishes 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 voltage  
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  
differentially 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.  
1 MHz Operation  
Differential AC Switching Current Sensing  
Accurate Programmable Maximum Duty Cycle  
Multiple Chips Can be Synchronized to  
Fastest Oscillator  
Wide Gain Bandwidth Product (70 MHz, Acl  
>10) Current Error and Current Sense  
Amplifiers  
Up to Ten Devices Can Easily Share a  
Common Load  
BLOCK DIAGRAM  
Pin numbers refer to 24-pin packages.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 1995–2007, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  

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