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MAX17261 PDF预览

MAX17261

更新时间: 2024-11-21 14:57:59
品牌 Logo 应用领域
亚德诺 - ADI 电池仪表
页数 文件大小 规格书
32页 1951K
描述
5.1μA、ModelGauge m5 EZ多节电池电量计

MAX17261 数据手册

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EVALUATION KIT AVAILABLE  
Click here for production status of specific part numbers.  
MAX17261  
5.1μA Multi-Cell Fuel Gauge  
with ModelGauge m5 EZ  
General Description  
Benefits and Features  
The MAX17261 is an ultra-low power fuel gauge IC which  
implements the Maxim ModelGauge™ m5 algorithm. The  
IC monitors a multiple-series cell battery pack with an ex-  
ternal resistor divider.  
● ModelGauge m5 EZ  
• No Characterization Required for EZ Performance  
• Robust Against Battery Variation  
• Eliminates Error Near Empty Voltage  
• Eliminates Coulomb Counter Drift  
• Compensates for Age, Current, and Temperature  
• Does Not Require Empty, Full, or Idle States  
The ModelGauge m5 EZ algorithm makes fuel gauge im-  
plementation easy by eliminating battery characterization  
requirements and simplifying host software interac-  
tion. The algorithm provides tolerance against battery di-  
versity for most lithium batteries and applications.  
● Low 5.1μA Operating Current  
● Monitors Multiple-Cell Battery Pack  
● Wide Sense Resistor Range: 1mΩ to 1000mΩ  
● PCB Metal Sensing + Temperature Compensation  
The algorithm combines the short-term accuracy and lin-  
earity of a coulomb counter with the long-term stability of  
a voltage-based fuel gauge, along with temperature com-  
pensation to provide industry-leading fuel gauge accura-  
cy. The IC automatically compensates for cell-aging, tem-  
perature, discharge rate, and provides accurate state-of-  
charge (SOC) in percentage (%) and remaining capacity  
in milliampere-hours (mAh) over a wide range of operat-  
ing conditions. As the battery approaches the critical re-  
gion near empty, the algorithm invokes a special correc-  
tion mechanism that eliminates any error. The IC provides  
accurate estimation of time-to-empty and time-to-full and  
provides three methods for reporting the age of the bat-  
tery: reduction in capacity, increase in battery resistance,  
and cycle odometer.  
● Supports Li+ and Variants Including LiFePO  
● Thermistor or ±1°C Internal Temperature  
4
● Dynamic Power Estimates Power Capability During  
Discharge  
● Time-to-Empty and Time-to-Full Estimation  
● Predicts Remaining Capacity Under Theoretical Load  
● No Calibration Required  
● Alert Indicator for Voltage, SOC, Temperature,  
Current and 1% SOC Change  
Ordering Information appears at end of data sheet.  
Simple Fuel Gauge Circuit Diagram  
The IC provides precision measurements of current, volt-  
age, and temperature. The temperature of the battery  
pack is measured using an internal temperature sensor or  
SYSPWR  
3~5V  
BATT  
REG  
2
external thermistor. A 2-wire I C interface provides access  
0.1µF  
to data and control registers. The IC is available in a tiny  
lead-free 0.4mm pitch, 1.5mm x 1.5mm, 9-pin WLP pack-  
age and 3mm x 3mm, 14-pin TDFN package.  
REG  
0.47µF  
CELLX  
MAX17261  
ALRT  
Applications  
SDA  
SCL  
PROTECTION  
CIRCUIT  
● Tablets, 2-in-1 Laptops  
● Digital Still, Video, and Action Cameras  
● Medical Devices  
TH  
CSPL (TDFN)  
EP (TDFN)  
RSENSE  
GND  
CSN  
● Handheld Computers and Terminals  
● Financial Terminals  
● Mobile Printers  
● Augmented/Virtual Reality Devices  
● Robots  
10kΩ  
NTC  
SYSGND  
● E-Bikes  
● Battery Backups  
● Wireless Speakers  
ModelGauge is a trademark of Maxim Integrated Products, Inc.  
19-100318; Rev 0; 5/18  
 
 
 

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