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参数资料
| 型号： | DS2786G-5+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 10/22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
Table 1. Current Range and Resolution for Various R SNS Values
CURRENT RESOLUTION (1 LSB)
|V SS - V SNS |
20m ?
15m ?
R SNS
10m ?
5m ?
25 ? V
1.25mA
1.667mA
2.5mA
5mA
CURRENT INPUT RANGE
V SS - V SNS
20m ?
15m ?
R SNS
10m ?
5m ?
±51.2mV
±2.56A
±3.41A
±5.12A
±10.24A
CURRENT OFFSET BIAS
The Current Offset Bias Register (COBR) allows a programmable offset value to be added to raw current
measurements. The result of the raw current measurement plus the COBR value is displayed as the current
measurement result in the Current Register, and is used for current accumulation and detection of an OCV
condition. The COBR value can be used to correct for a static offset error, or can be used to intentionally skew the
current results and therefore the current accumulation.
Read and write access is allowed to COBR. Whenever the COBR is written, the new value is applied to all
subsequent current measurements. COBR can be programmed in 25 ? V steps to any value between +3.175mV
and -3.2mV. The COBR value is stored as a two’s complement value in nonvolatile (NV) memory. The COBR
factory default value is 00h.
Figure 9. Current Offset Bias Register Format
Address 60h
S
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
LSb
“S”: sign bit
Units:
25 ? V/R SNS
CURRENT ACCUMULATION
An Internal Accumulated Current Register (IACR) serves as an up/down counter holding a running count of charge
since the last OCV condition. Current measurement results, plus a programmable bias value are internally
summed, or accumulated, at the completion of each current measurement conversion period. The IACR has a
range of ±204.8mVh. The IACR uses the Initial or Learned Cell Capacity Registers to increment or decrement the
Relative Capacity Register as current flows into or out of the battery. In this way, the fuel gauge is accurate even
when an OCV condition does not occur for an extended time period.
Table 2. Accumulated Current Range for Various R SNS Values
IACR RANGE
V SS - V SNS
±204.8mVh
20m ?
±10.24Ah
15m ?
±13.65Ah
R SNS
10m ?
±20.48Ah
5m ?
±40.96Ah
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相关代理商/技术参数 |
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|---|---|
| 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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