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参数资料
| 型号： | DS2786G-5+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/22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
CELL CAPACITY ESTIMATION
The DS2786 uses a hybrid OCV measurement and coulomb counting algorithm to estimate remaining cell capacity.
During periods of charging or discharging of the cell, the DS2786 counts charge flow into and out of the cell. When
the application becomes inactive, the DS2786 waits for the cell voltage to relax and then adjusts the coulomb count
based on an open-circuit voltage cell model stored in device EEPROM. The resulting calculation is reported to the
system as a percentage value between 0% and 100%. As the cell ages, a Learn feature adjusts for changes in
capacity.
The Relative Capacity Register reports remaining cell charge as a percentage of full. Relative Capacity is reported
with a resolution of 0.5% and is limited to a value between 0% and 100%. The Relative Capacity Register is
updated each time the IC performs a current measurement or open-circuit cell voltage measurement.
Figure 10. Relative Capacity Register Format
Address 02h
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
LSb
Units: 0.5%
Prior to the first Learn operation, the Relative Capacity value is calculated by adding the IACR multiplied by the
Initial Capacity Scaling Factor (7Ah) to the Last OCV Relative Capacity (16h). After the first Learn operation, the
Relative Capacity value is calculated by adding the IACR multiplied by the Learned Capacity Scaling Factor (17h)
to the Last OCV Relative Capacity (16h).
Each Capacity Scaling Factor Register has a resolution of 78.125%/Vh and a maximum range of 0 to
19921.875%/Vh. During assembly, the Initial Capacity Register should be programmed to the capacity of the cell.
For example, an application using a 1Ah cell and 0.015 ? sense resistor would set the Initial Capacity Register to a
value of (100% ÷ (1Ah × 0.015 ? )) ÷ 78.125%/Vh = 55h. The Learned Capacity Scaling Factor Register is
controlled by the DS2786. The power up value is 00h, and the register is updated with the calculated new cell
capacity value after every Learn operation.
Figure 11. Initial Capacity Scaling Factor Register Format
Address 7Ah
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
LSb
Units: 78.125%/Vh
Figure 12. Learned Capacity Scaling Factor Register Format
Address 17h
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
11 of 22
LSb
Units: 78.125%/Vh
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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 |
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