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LM3815M-1.0/NOPB PDF预览

LM3815M-1.0/NOPB

更新时间： 2024-11-08 19:55:51
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德州仪器 - TI 光电二极管
页数 文件大小 规格书
17页 449K
描述
2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 0.150 INCH, PLASTIC, SOP-8

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LM3815M-1.0/NOPB 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：SOP, SOP8,.25针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.32
可调阈值：NO模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：R-PDSO-G8JESD-609代码：e3
长度：4.9 mm湿度敏感等级：1
信道数量：2功能数量：1
端子数量：8封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOP8,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.75 mm子类别：Power Management Circuits
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
技术：BIPOLAR端子面层：Matte Tin (Sn)
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：40
宽度：3.9 mmBase Number Matches：1

LM3815M-1.0/NOPB 数据手册

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OBSOLETE  
LM3814, LM3815  
www.ti.com  
SNVS045D –JANUARY 1999–REVISED APRIL 2013  
LM3814/LM3815 Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM  
Output  
Check for Samples: LM3814, LM3815  
1
FEATURES  
DESCRIPTION  
The LM3814/LM3815 Current Gauges provide easy  
to use precision current measurement with virtually  
zero insertion loss (typically 0.004Ω). The LM3814 is  
used for high-side sensing and the LM3815 is used  
for low-side sensing.  
2
•
No External Sense Element Eequired  
•
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 6 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 LM3814 and LM3815 are factory-set in two  
different current options. The sense range is −1A to  
+1A or −7A to +7A. The user specifies a particular  
part number to match the current range for a given  
application. The sampling interval for these parts is  
6ms. If larger sampling interval is desired for better  
accuracy, please refer to the data sheets for the part  
numbers LM3812 and LM3813.  
Power Supply Load Monitoring and  
Management  
•
Resettable Smart Fuse  
KEY SPECIFICATIONS  
•
•
•
Ultra Low Insertion Loss (typical) 0.004 Ω  
Supply Range 2 to 5.25 V  
Accuracy at Room Temperature (includes  
accuracy of the internal sense element)  
(LM3814-1.0, LM3815-1.0) ±3.5 %  
•
•
Low Quiescent Current in Shutdown Mode  
(typical) 2.5 µA  
Sampling Interval 6 msec  
CONNECTION DIAGRAMS  
Figure 1. Top View  
LM3814 for High-Side Sensing  
Figure 2. Top View  
LM3815 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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