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参数资料
| 型号： | DS2780E+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/31页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE BATT 8TSSOP |
| 产品培训模块： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 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： | 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： | 8-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 管件 |
| 产品目录页面： | 1436 (CN2011-ZH PDF) |
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DS2780 Standalone Fuel Gauge IC
Figure 11. Top Level Algorithm Diagram
MODELING CELL CHARACTERISTICS
In order to achieve reasonable accuracy in estimating remaining capacity, the cell performance characteristics over
temperature, load current, and charge termination point must be considered. Since the behavior of Li-ion cells is
non-linear, even over a limited temperature range of 10°C to 35°C, these characteristics must be included in the
capacity estimation to achieve a reasonable accuracy. See Applications Note AN131 “Li+ Fuel Gauging with Dallas
Semiconductor Devices” for general information on the FuelPack? method used in the DS2780. To facilitate
efficient implementation in hardware, a modified version of the method outlined in AN131 is used to store cell
characteristics in the DS2780. Full and empty points are retrieved in a lookup process which re-traces a piece-wise
linear model. Three model curves are stored: Full, Active Empty and Standby Empty. Each model curve is
constructed with 4 line segments and spans from 0°C to 40°C. Operation outside the 0°C to 40°C model span is
supported by the model with minimal loss of accuracy. Above 40°C, the 40°C fixed points are extended with zero
slope. This achieves a conservative capacity estimate for temperatures above 40°C. Below 0°C, the model curves
are extended using the slope of each 0°C to 10°C segment. If low temperature operation is expected, the 0°C to
10°C slopes can be selected to optimize the model accuracy. A diagram of example battery cell model curves is
shown in Figure 12.
FuelPack is a trademark of Maxim Integrated Products, Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2780E/R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone Fuel Gauge IC |
| DS2780E/T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone Fuel Gauge IC |
| DS2780E/T&R | 制造商:Maxim Integrated Products 功能描述:STANDALONG FUELD CAUGE TSSOP T&R - Tape and Reel |
| DS2780E/T&R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone Fuel Gauge IC |
| DS2780E/TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Standalone Fuel Gauge IC |
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