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LM3812MX-7.0 PDF预览

LM3812MX-7.0

更新时间： 2024-09-18 20:33:59
品牌 Logo 应用领域
德州仪器 - TI 光电二极管
页数 文件大小 规格书
17页 476K
描述
2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 0.150 INCH, PLASTIC, SOP-8

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LM3812MX-7.0 技术参数

生命周期：Obsolete零件包装代码：SOIC
包装说明：SOP,针数：8
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.82
其他特性：SEATED HGT-NOM可调阈值：NO
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：R-PDSO-G8
长度：4.9 mm信道数量：1
功能数量：1端子数量：8
最高工作温度：125 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
座面最大高度：1.75 mm最大供电电压 (Vsup)：5.25 V
最小供电电压 (Vsup)：2 V标称供电电压 (Vsup)：5 V
表面贴装：YES温度等级：AUTOMOTIVE
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL宽度：3.9 mm
Base Number Matches：1

LM3812MX-7.0 数据手册

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LM3812, LM3813  
www.ti.com  
SNOS028D –JUNE 1999–REVISED APRIL 2013  
LM3812/LM3813 Precision Current Gauge IC with Ultra Low Loss Sense Element and  
PWM Output  
Check for Samples: LM3812, LM3813  
1
FEATURES  
DESCRIPTION  
The LM3812/LM3813 Current Gauges provide easy  
to use precision current measurement with virtually  
zero insertion loss (typically 0.004Ω). The LM3812 is  
used for high-side sensing and the LM3813 is used  
for low-side sensing.  
2
•
No External Sense Element Required  
•
PWM Output Indicates the Current Magnitude  
and Direction  
•
PWM Output can be Interfaced with  
Microprocessors  
A
Delta Sigma analog to digital converter is  
•
•
•
•
Precision ΔΣ Current-Sense Technique  
Low Temperature Sensitivity  
incorporated to precisely measure the current and to  
provide a current averaging function. Current is  
averaged over 50 msec time periods in order to  
provide immunity to current spikes. The ICs have a  
pulse-width modulated (PWM) output which indicates  
the current magnitude and direction. The shutdown  
pin can be used to inhibit false triggering during start-  
up, or to enter a low quiescent current mode.  
Internal Filtering Rejects False Trips  
Internal Power-On-Reset (POR)  
APPLICATIONS  
•
•
•
Battery Charge/Discharge Gauge  
Motion Control Diagnostics  
The LM3812 and LM3813 are factory-set in two  
different current options. The sense range is −1A to  
+1A or −7A to +7A. The sampling interval for these  
parts is 50ms. If faster sampling is desired, please  
refer to the data sheets for the part numbers LM3814  
and LM3815.  
Power Supply Load Monitoring and  
Management  
•
Resettable Smart Fuse  
KEY SPECIFICATIONS  
•
•
•
Ultra Low Insertion Loss (Typically 0.004Ω)  
2V to 5.25V Supply Range  
±2% Accuracy at Room Temperature (Includes  
Accuracy of the Internal Sense Element)  
( LM3812-1.0, LM3813-1.0)  
•
•
Low Quiescent Current In Shutdown Mode  
(Typically 2.5 µA)  
50 msec Sampling Interval  
Connection Diagrams  
Figure 1. LM3812 (Top View)  
for High-Side Sensing  
Figure 2. LM3813 (Top View)  
for Low-Side Sensing  
1
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.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 1999–2013, Texas Instruments Incorporated  
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