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参数资料
| 型号： | DS2764AE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC MON BATT LI-ION HP 16-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 96 |
| 功能： | 电池监控器 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 管件 |
DS2764 High-Precision Li+ Battery Monitor With 2-Wire Interface
CURRENT MEASUREMENT
In active mode, the DS2764 continually measures the current flow into and out of the battery by measuring the
voltage drop across a current-sense resistor. The DS2764 is available in two configurations: 1) internal 25m ?
current-sense resistor and 2) external user-selectable sense resistor. In either configuration, the DS2764 considers
the voltage difference between pins IS1 and IS2 (V IS = V IS1 - V IS2 ) to be the filtered voltage drop across the sense
resistor. A positive V IS value indicates current is flowing into the battery (charging), while a negative V IS value
indicates current is flowing out of the battery (discharging).
V IS is measured with a signed resolution of 12 bits. The current register is updated in two’s-complement format
every 88ms with an average of 128 readings. Current measurements outside the register range are reported at the
range limit. Each measurement is internally compensated for offset on a continual basis minimizing error resulting
from variations in device temperature and voltage. Figure 5 shows the format of the current register.
For the internal sense resistor configuration, the DS2764 maintains the current register in units of amps, with a
resolution of 0.625mA and full-scale range of no less than ? 1.9A (see Note 7 on I FS spec for more details). The
DS2764 automatically compensates for internal sense resistor process variations and temperature effects when
reporting current.
For the external sense resistor configuration, the DS2764 writes the measured V IS voltage to the current register,
with a 15.625 ? V resolution and a full-scale ? 64mV range.
Figure 5. Current Register Format
MSB—Address 0E
LSB—Address 0F
S
2 11
2 10
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
X
X
X
MSb
LSb
MSb
LSb
Units: 0.625mA for Internal Sense Resistor
15.625 ? V for External Sense Resistor
CURRENT ACCUMULATOR
The current accumulator facilitates remaining capacity estimation by tracking the net current flow into and out of the
battery. Current flow into the battery increments the current accumulator while current flow out of the battery
decrements it. Data is maintained in the current accumulator in two’s-complement format. Figure 6 shows the
format of the current accumulator.
When the internal sense resistor is used, the DS2764 maintains the current accumulator in units of amp-hours, with
a 0.25mAhrs resolution and full-scale ? 8.2Ahrs range. When using an external sense resistor, the DS2764
maintains the current accumulator in units of volt-hours, with a 6.25 ? Vhrs resolution and a full-scale ? 205mVhrs
range.
The current accumulator is a read/write register that can be altered by the host system as needed.
Figure 6. Current Accumulator Format
MSB—Address 10
LSB—Address 11
S
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: 0.25mAhrs for Internal Sense Resistor
6.25 ? Vhrs for External Sense Resistor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2764AE/R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:High-Precision Li+ Battery Monitor with 2-Wire Interface |
| DS2764AE/T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:High-Precision Li+ Battery Monitor with 2-Wire Interface |
| DS2764AE/T&R | 制造商:Maxim Integrated Products 功能描述:LI+BATT MNTR2WIRE 4.275OV16P TSSOP - Tape and Reel |
| DS2764AE/T&R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:High-Precision Li+ Battery Monitor with 2-Wire Interface |
| DS2764AE+ | 功能描述:电池管理 Ic Mon Batt Li-Ion Hp RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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