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| 型号： | DS2790E+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 32/41页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE BATT 28TSSOP |
| 产品培训模块： | 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） |
| 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： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 管件 |
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DS2790 Programmable 1-Cell Li-Ion Fuel Gauge and Protector
Accumulation Blanking
In order to avoid the accumulation of small positive offset errors over long periods, an offset blanking filter is
provided. The blanking filter is enabled by setting the OBEN bit in the ADC Configuration Register. When OBEN is
set, charge currents (positive values from the Current register) less than 62.5 μ V are not accumulated in the ACR.
The minimum charge current accumulated in the ACR is 4.167mA for R SNS = 0.015 Ω .
Accumulation Bias
Systematic errors or an application preference can require the application of an arbitrary bias to the current
accumulation process. The Accumulation Bias value sets a user programmed positive or negative bias to the
current accumulation process. The accumulation bias value can be used to estimate battery currents that do not
flow through the sense resistor, estimate battery self-discharge, or correct for offset error accumulated in the ACR
register. The user programmed two’s compliment value is added to the ACR once per current sample. The bias
control is applied in 0.98 μ V increments over a ±125 μ V range. When using a 15m Ω sense resistor, the bias control
can be adjusted in 65.3 μ A increments over a ±8.33mA range. The Accumulation Bias bit field is located in the
upper byte of the ADC Configuration register.
Figure 14. Accumulation Bias Field
Upper Byte of Word Address 600Ah
S
2 6
2 5
2 4
2 3
2 2
2 1
2 0
Units: 2 = 0.98 μ V/R SNS
MSb
“S”: sign bit
0
LSb
Voltage Measurement
The DS2790 continually measures the voltage between pins V IN and AV SS over a 0.0V to V FS range, and the
Voltage register is updated in two’s-complement format every 3.4ms with a resolution of 4.88mV. Voltages above
the maximum register value are reported as the maximum value.
Figure 15. Voltage Register Format
Word Address 6003h
S
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
X
X
X
X
X
Units: 2 = 4.88 mV
MSb
“S”: sign bit
0
LSb
Temperature Measurement
The DS2790 uses an integrated temperature sensor to continually measure battery temperature. Temperature
measurements are updated in the Temperature register every 220ms in two’s-complement format with a resolution
of 0.125°C over a ± 127°C range. The Temperature register format is shown in Figure 16.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2790E+ | 功能描述:IC FUEL GAUGE BATT 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:1 系列:- 功能:充电管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
| DS2790E+T&R | 制造商:Maxim Integrated Products 功能描述:IC FUEL GAUGE BATT 28TSSOP |
| DS2790E+T&R | 功能描述:IC FUEL GAUGE BATT 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:1 系列:- 功能:充电管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
| DS2790G | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Programmable 1-Cell Li-Ion Fuel Gauge and Protector |
| DS2790G+ | 功能描述:IC FUEL GAUGE BATT 28-TDFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:1 系列:- 功能:充电管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
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