参数资料
| 型号： | DS2781E+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/31页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE BATT 8TSSOP |
| 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 ~ 10 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 带卷 (TR) |
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DS2781
VOLTAGE MEASUREMENT
Battery voltage is measured at the V IN input with respect to V SS over a range of 0V to 9.9902V, with a resolution of
9.76mV. The result is updated every 440ms and placed in the VOLTAGE register in two’s complement form.
Voltages above the maximum register value are reported at the maximum value; voltages below the minimum
register value are reported at the minimum value. The format of the voltage register is shown in Figure 3.
Figure 3. Voltage Register Format
VOLT
MSB—Address 0Ch
LSB—Address 0Dh
Read Only
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
MSb
“S”: sign bit(s), “X”: reserved
LSb
MSb
LSb
Units: 9.76mV
TEMPERATURE MEASUREMENT
The DS2781 uses an integrated temperature sensor to measure battery temperature with a resolution of 0.125°C.
Temperature measurements are updated every 440ms and placed in the temperature register in two’s complement
form. The format of the temperature register is shown in Figure 4.
Figure 4. Temperature Register Format
TEMP
MSB—Address 0Ah
LSB—Address 0Bh
Read Only
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
MSb
“S”: sign bit(s), “X”: reserved
LSb
MSb
LSb
Units: 0.125 ° C
CURRENT MEASUREMENT
In the ACTIVE mode of operation, the DS2781 continually measures the current flow into and out of the battery by
measuring the voltage drop across a low-value current-sense resistor, R SNS . The voltage-sense range between
SNS and V SS is ±51.2mV. The input linearly converts peak signal amplitudes up to 102.4mV as long as the
continuous signal level (average over the conversion cycle period) does not exceed ±51.2mV. The ADC samples
the input differentially at 18.6kHz and updates the Current register at the completion of each conversion cycle.
The Current register is updated every 3.515s with the current conversion result in two’s complement form. Charge
currents above the maximum register value are reported at the maximum value (7FFFh = +51.2mV). Discharge
currents below the minimum register value are reported at the minimum value (8000h = -51.2mV).
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2781EVKIT+ | 制造商:Maxim Integrated Products 功能描述:1-CELL OR 2-CELL STAND-ALONE FUEL GAUGE IC - Boxed Product (Development Kits) |
| DS2781G+ | 功能描述:电池管理 1-2 Cell Stand-Alone Fuel Gauge 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 |
| DS2781G+T&R | 制造商:Maxim Integrated Products 功能描述:2 CELL STAND ALONE FG 10-TDFN LF - Tape and Reel |
| DS2781G-A2+T&R | 制造商:Maxim Integrated Products 功能描述: |
| DS2781K | 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 |
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