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LM25056APSQE PDF预览

LM25056APSQE

更新时间： 2024-10-02 02:58:43
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
38页 927K
描述
System Power Measurement IC with PMBus™

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LM25056APSQE 数据手册

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LM25056  
www.ti.com  
SNVS784A –JANUARY 2012–REVISED APRIL 2013  
LM25056 System Power Measurement IC with PMBus  
Check for Samples: LM25056  
1
FEATURES  
APPLICATIONS  
234  
•
Input Voltage Range: 3V to 17V  
I2C/SMBus Interface with PMBus Compliant  
Command Structure  
•
•
•
Server Backplane Systems  
•
Base Station Power Distribution Systems  
Subsystem Power Measurement  
•
Remote Temperature Sensing with  
Programmable Warning and Shutdown  
Thresholds  
DESCRIPTION  
The LM25056 combines high performance analog  
and digital technology with a PMBus™ compliant  
SMBus™/I2C interface to accurately measure the  
operating conditions of electrical systems including  
•
•
Real Time Monitoring of VIN, IIN, PIN, VAUX with  
12-bit Resolution and 1 kHz Sampling Rate  
True Input Power Measurement Using  
Simultaneous Sampling of VIN and IIN  
Accurately Averages Dynamic Power Readings  
computing and storage blades connected to  
a
backplane power bus. The LM25056 continuously  
supplies real-time power, voltage, current, and  
temperature data to the system management host via  
the SMBus interface.  
•
Averaging of VIN, IIN, PIN, and VAUX Over  
Programmable Interval Ranging from 0.001 to  
4 Seconds  
The LM25056 monitoring block captures both real-  
time and average values of subsystem operating  
parameters (VIN, IIN, PIN, VAUX) as well as peak  
•
•
User Programmable WARN and FAULT  
Thresholds with SMBA Notification  
power.  
accomplished by measuring the product of the input  
voltage and current through shunt resistor.  
LM25056 current measurement has ±1.5%  
Accurate  
power  
measurement  
is  
Black Box Capture of Telemetry  
Measurements and Device Status Triggered by  
WARN and FAULT Conditions  
a
a
•
•
Full Featured Application Development  
Software  
accuracy over the temperature range of -40°C to  
+85°C with operation from -40°C to +125°C. A black  
box (Telemetry/Fault Snapshot) function captures and  
stores telemetry data and device status in the event  
of a warning or a fault.  
WQFN-24 Package  
Typical Application Schematic  
R
S
+12V  
MMBT3904  
V
IN  
V
OUT  
C
IN  
POL  
REGULATOR  
VIN  
VS+  
VS- DIODE  
VDD  
ADR2  
ADR1  
ADR0  
VAUX  
VREF  
VDD  
NC  
NC  
ENABLE  
LM25056  
C
VREF  
SMBA  
SDA  
SMBus  
Interface  
C
VDD  
SCL  
DGND  
AGND  
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.  
SMBus is a trademark of Intel Corporation.  
PMBus is a trademark of SMIF, Incorporated.  
All other trademarks are the property of their respective owners.  
2
3
4
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 © 2012–2013, Texas Instruments Incorporated  
1234567...38

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