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参数资料
| 型号： | DS2784G+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 18/43页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE STND-ALONE 14-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 ~ 4.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x5） |
| 包装： | 带卷 (TR) |
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DS2784: 1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
The average current register reports an average current level over the preceding 28s. The register value is updated
every 28s in two’s complement form, and represents an average of the eight preceding current register values.
AVERAGE CURRENT REGISTER FORMAT
MSB—ADDRESS 08h
LSB—ADDRESS 09h
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
“S”: Sign Bit(s)
LSb
MSb
LSb
Units: 1.5625 μ V/R SNS
CURRENT OFFSET CORRECTION
Every 1024th conversion, the ADC measures its input offset to facilitate offset correction. Offset correction occurs
approximately once per hour. The resulting correction factor is applied to the subsequent 1023 measurements.
During the offset correction conversion, the ADC does not measure the sense-resistor signal. A maximum error of
1/1024 in the accumulated current register (ACR) is possible; however, to reduce the error, the current
measurement made just prior to the offset conversion is retained in the current register and is substituted for the
dropped current measurement in the current accumulation process. Therefore, the accumulated current error due
to offset correction is typically much less than 1/1024.
CURRENT OFFSET BIAS
The current offset bias (COB) value allows a programmable offset value to be added to raw current measurements.
The result of the raw current measurement plus COB is displayed as the current measurement result in the current
register, and is used for current accumulation. COB 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 COB. Whenever the COB is written, the new value is applied to all subsequent
current measurements. COB can be programmed in 1.56 μ V steps to any value between +198.1μV and -199.7μV.
The COB value is stored as a two’s complement value in EEPROM. The COB is loaded on power-up from
EEPROM memory. The factory default value is 00h.
The difference between the CAB and COB is that the CAB is not subject to current blanking. Offset currents
between 100μV and -25μV are not accumulated if the offset is made by the COB. Offset currents between 100μV
and -25μV are accumulated if they are made by the CAB.
CURRENT OFFSET BIAS REGISTER FORMAT
ADDRESS 7Bh
S
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
“S”: Sign Bit(s)
LSb
Units: 1.56 μ V/R SNS
CURRENT BLANKING
The current blanking feature modifies current measurement result prior to being accumulated in the ACR. Current
blanking occurs conditionally when a current measurement (raw current + COBR) falls in one of two defined
ranges. The first range prevents charge currents less than 100 μ V from being accumulated. The second range
prevents discharge currents less than 25 μ V in magnitude from being accumulated. Charge current blanking is
always performed; however, discharge current blanking must be enabled by setting the NBEN bit in the control
register. See the register description for additional information.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2784K | 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 |
| DS2786 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Standalone OCV-Based Fuel Gauge |
| DS2786_09 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone OCV-Based Fuel Gauge |
| DS2786B | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone OCV-Based Fuel Gauge |
| DS2786BEVKIT+ | 制造商:Maxim Integrated Products 功能描述:STANDALONE OCV-BASED FUEL GAUGE - Boxed Product (Development Kits) |
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