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LTC3805EMSE-TRPBF PDF预览

LTC3805EMSE-TRPBF

更新时间： 2024-02-24 00:26:50
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
20页 198K
描述
Adjustable Frequency Current Mode Flyback DC/DC Controller

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中文翻译

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LTC3805EMSE-TRPBF 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：HTSSOP,
针数：10Reach Compliance Code：compliant
风险等级：5.12模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：8.9 V最小输入电压：4.15 V
标称输入电压：8 VJESD-30 代码：S-PDSO-G10
JESD-609代码：e3长度：3 mm
功能数量：1端子数量：10
封装主体材料：PLASTIC/EPOXY封装代码：HTSSOP
封装形状：SQUARE封装形式：SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：1.1 mm表面贴装：YES
切换器配置：BOOST最大切换频率：700 kHz
技术：CMOS端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.5 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：3 mmBase Number Matches：1

LTC3805EMSE-TRPBF 数据手册

 浏览型号LTC3805EMSE-TRPBF的Datasheet PDF文件第2页浏览型号LTC3805EMSE-TRPBF的Datasheet PDF文件第3页浏览型号LTC3805EMSE-TRPBF的Datasheet PDF文件第4页浏览型号LTC3805EMSE-TRPBF的Datasheet PDF文件第5页浏览型号LTC3805EMSE-TRPBF的Datasheet PDF文件第6页浏览型号LTC3805EMSE-TRPBF的Datasheet PDF文件第7页 
LTC3805  
Adjustable Frequency  
Current Mode Flyback  
DC/DC Controller  
FEATURES  
DESCRIPTION  
The LTC®3805 is a current mode controller for flyback  
DC/DCconvertersdesignedtodriveanN-channelMOSFET  
in high input and output voltage converter applications.  
Operating frequency and slope compensation can be pro-  
grammedbyexternalresistors.Programmableovercurrent  
sensing protects the converter from short-circuits. Soft-  
start can be programmed using an external capacitor  
and the soft-start capacitor also programs an automatic  
restart feature.  
■
V and V  
Limited Only by External Components  
IN  
OUT  
■
■
Adjustable Slope Compensation  
Adjustable Overcurrent Protection with Automatic  
Restart  
■
Adjustable Operating Frequency (70kHz to 700kHz)  
with One External Resistor  
Synchronizable to an External Clock  
±±.5ꢀ ꢁeference Accuracy  
Current Mode Operation for Excellent Line and Load  
Transient ꢁesponse  
ꢁUN Pin with Precision Threshold and Adjustable  
Hysteresis  
■
■
■
The LTC3805 provides ±±.5ꢀ output voltage accuracy  
and consumes only 360μA of quiescent current during  
normal operation and only 40μA during micropower start-  
up. Using a 9.5V internal shunt regulator, the LTC3805 can  
■
■
■
■
Programmable Soft-Start with One External Capacitor  
Low Quiescent Current: 360μA  
Small ±0-Lead MSOP and 3mm × 3mm DFN  
be powered from a high V through a resistor or it can  
IN  
be powered directly from a low impedance DC voltage of  
9V or less.  
APPLICATIONS  
The LTC3805 is available in the ±0-lead MSOP package  
and the 3mm × 3mm DFN package.  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
■
Telecom Power Supplies  
■
42V and ±2V Automotive Power Supplies  
■
Isolated Electronic Equipment  
TYPICAL APPLICATION  
36V – 72V to 5V/2A Nonisolated Flyback Converter  
Efficiency and Power Loss  
vs Load Current; VO = 5V  
V
OUT  
V
IN  
5V  
±00  
90  
±0  
V
IN  
= 48V  
36V TO  
72V  
AT 2A  
22μF  
× 2  
22±k  
±00k  
±00μF  
× 2  
80  
70  
60  
EFFICIENCY  
22μF  
ꢁUN  
50  
40  
±
8.66k  
LOSS  
V
CC  
GATE  
OC  
30  
20  
±0  
0
LTC3805  
±.33k  
3k  
I
TH  
7±.5k  
±3.7k  
SSFLT  
FS  
I
SENSE  
FB  
0.±μF  
20k  
0.±  
±0  
0.0±  
±
0.±  
SYNC GND  
LOAD CUꢁꢁENT (A)  
470pF  
±±8k  
68mΩ  
3805 TA0±a  
3805 TA0±b  
3805fb  
1
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中文翻译

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