- 您现在的位置：买卖IC网 > PDF目录1788 > DS2786G-5+T&R (Maxim Integrated Products)IC FUEL GAUGE OCV-BASED 10-TDFN PDF资料下载
参数资料
| 型号： | DS2786G-5+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/22页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE OCV-BASED 10-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： | 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： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN-EP（3x4） |
| 包装： | 带卷 (TR) |
DS2786 Stand-Alone OCV-Based Fuel Gauge
Figure 17. Voltage Breakpoint Register Format
MSB—Even Addresses 68h–78h
LSB—Odd Address 69h–79h
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
X
MSb
“X”: reserved
LSb
MSb
LSb
Units: 1.22mV
INITIAL CAPACITY ESTIMATION
The DS2786 calculates Relative Capacity immediately upon power up. During initialization, the DS2786 makes a
voltage measurement and uses the OCV cell model data to determine a starting point for the Relative Capacity
Register. This estimation occurs regardless of the load on the cell. Any error induced from cell loading will be
removed at the next OCV adjustment. The initial voltage measurement used in determining the starting point is
stored in the Initial Voltage Register until the IC is power cycled.
Figure 18. Initial Voltage Register Format
MSB—Address 14h
LSB—Address 15h
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
“S”: sign bit(s), “X”: reserved
LSb
MSb
LSb
Units: 1.22mV
NEW CAPACITY LEARNING
As the cell ages, the Initial Capacity Scaling Factor Register value may no longer accurately reflect the true
capacity of the cell causing error in Relative Capacity calculation while in coulomb-counting mode of operation. The
DS2786 has a learn feature that allows the IC to remain accurate as the cell changes. The DS2786 compares the
percent Relative Capacity difference between the last two OCV updates to the change in the coulomb count to
learn the new cell capacity. The Last OCV Register maintains the Relative Capacity percentage at the previous
OCV adjustment point used for learning the new cell capacity. Last OCV will be updated with a new value at each
OCV adjustment.
Example: Assuming a 15m ? sense resistor, the DS2786 adjusts the Relative Capacity of a 1000mAH cell to 10%
based on an OCV measurement during an idle period of the application. The cell is then charged by 500mAH (to
60% expected) based on the internal coulomb count multiplied by the Learned Capacity Scaling Factor value of
55h. The next OCV adjustment determines the Relative Capacity should actually be at 65%, not 60%. The DS2786
then adjusts the Learned Capacity Scaling Factor value upward to (65% - 10%) ÷ (500mAH × 0.015 ? ) = 5Eh
lowering the expected cell capacity by approximately 10%.
14 of 22
相关PDF资料 |
PDF描述 |
|---|---|
| DS2788E+T&R | IC FUEL GAUGE W/DSP DRV 14TSSOP |
| DS2790G+T&R | IC FUEL GAUGE BATT 28-TDFN |
| DS3881E+T&R | IC CCFL CONTROL 24TSSOP |
| DS3882E+T&R | IC CCFL CNTRLR DUAL 28TSSOP |
| DS3984T+ | IC CCFL CNTRLR 4CH 32-TQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2786K | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| DS2786K-SMP | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| DS2788 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone Fuel-Gauge IC with LED Display Drivers |
| DS2788_09 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone Fuel-Gauge IC with LED Display Drivers |
| DS2788E+ | 功能描述:电池管理 Stand-Alone F-Gauge w/LED Display Drvrs 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 |
发布紧急采购，3分钟左右您将得到回复。