参数资料
型号: DS2778G+T&R
厂商: Maxim Integrated Products
文件页数: 24/46页
文件大小: 0K
描述: IC FUEL GAUGE LI+ 2CELL 14-TDFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
功能: 燃料,电量检测计/监控器
电池化学: 锂离子(Li-Ion)、锂聚合物(Li-Pol)
电源电压: 4 V ~ 9.2 V
工作温度: -20°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 14-WFDFN 裸露焊盘
供应商设备封装: 14-TDFN-EP(3x5)
包装: 带卷 (TR)
2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
MSB—ADDRESS 02h
LSB—ADDRESS 03h
2 15
2 14
2 13
2 12
2 11
2 10
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
LSb
MSb
LSb
UNITS: 1.6mAh
Figure 16. Remaining Active Absolute Capacity (RAAC) [mAh]
The RAAC register reports the capacity available under the current temperature conditions to the the active-empty
point in absolute units of milliamps/hour (mAh). RAAC is 16 bits.
MSB—ADDRESS 04h
LSB—ADDRESS 05h
2 15
2 14
2 13
2 12
2 11
2 10
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
LSb
MSb
LSb
UNITS: 1.6mAh
Figure 17. Remaining Standby Absolute Capacity (RSAC) [mAh]
The RSAC register reports the remaining battery capacity available under the current temperature conditions to the
standby-empty point capacity in absolute units of milliamps/hour (mAh). RSAC is 16 bits.
MSB –ADDRESS 06h
2 15
2 14
2 13
2 12
2 11
2 10
2 9
2 8
MSb
LSb
UNITS: 1%
Figure 18. Remaining Active Relative Capacity (RARC) [%]
The RARC register reports the remaining battery capacity available under the current temperature conditions to the
active-empty point in relative units of percent (%). RARC is 8 bits.
MSB –ADDRESS 07h
2 15
2 14
2 13
2 12
2 11
2 10
2 9
2 8
MSb
LSb
UNITS: 1%
Figure 19. Remaining Standby Relative Capacity (RSRC) [%]
The RSRC register reports the remaining battery capacity available under the current temperature conditions to the
standby-empty point capacity in relative units of percent (%). RSRC is 8 bits.
Calculation of Results
RAAC [mAh] = (ACR[mVh] - AE(T) x FULL40[mVh]) x RSNSP [mhos]*
RSAC [mAh] = (ACR[mVh] - SE(T) x FULL40[mVh]) x RSNSP [mhos]*
RARC [%] = 100% x (ACR[mVh] - AE(T) x FULL40[mVh])/{(AS x FULL(T) - AE(T)) x FULL40[mVh]}
RSRC [%] = 100% x (ACR[mVh] - SE(T) x FULL40[mVh])/{(AS x FULL(T) - SE(T)) x FULL40[mVh]}
*RSNSP = 1/R SNS
24
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