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参数资料
| 型号： | DS2786G-5+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/22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
VOLTAGE MEASUREMENT
Battery voltage is measured at the V IN input with respect to V SS over a range of 0V to 4.5V and with a resolution of
1.22mV. The result is updated every 880ms and placed in the Voltage Register in two’s complement form. Voltages
above the maximum register value are reported as 7FFFh.
Figure 5. Voltage Register Format
MSB—Address 0Ch
LSB—Address 0Dh
S
2 11
2 10
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
X
X
X
MSb
“S”: sign bit(s), “X”: reserved
LSb
MSb
LSb
Units: 1.22mV
The input impedance of V IN is sufficiently large (>15M ? ) to be connected to a high-impedance voltage divider in
order to support multiple-cell applications. The pack voltage should be divided by the number of series cells to
present a single-cell average voltage to the V IN input.
Every 1024th conversion, the ADC measures its input offset to facilitate offset correction to improve voltage
accuracy. Offset correction occurs approximately every 15 minutes. The resulting correction factor is applied to the
subsequent 1023 measurements. During the offset correction conversion, the ADC does not measure the V IN
signal. The voltage measurement just prior to the offset conversion is displayed in the voltage register. The OCV
algorithm automatically adjusts for the effects of the offset correction cycle.
AUXILARY INPUT MEASUREMENTS
The DS2786 has two auxiliary voltage measurement inputs, AIN0 and AIN1. Both are measured with respect to
V SS . These inputs are designed for measuring resistor ratios, particularly useful for measuring thermistor or pack
identification resistors. Prior to the beginning of a measurement cycle on AIN0 or AIN1, the V OUT pin outputs a
reference voltage in order to drive a resistive divider formed by a known resistor value, and the unknown resistance
to be measured. This technique delivers good accuracy at a reasonable cost, as it removes reference tolerance
from the error calculations. Measurements alternate between each input. Each auxiliary measurement is therefore
updated every 1760ms and placed in the corresponding AIN0 or AIN1 Register in two’s complement form.
Figure 6. Auxiliary Input Registers Format
AIN0
MSB—Address 08h
LSB—Address 09h
S
2 10
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
X
X
X
X
MSb
“S”: sign bit, “X”: reserved
MSB—Address 0Ah
AIN1
LSb
MSb
LSb
Units: V OUT × 1/2047
LSB—Address 0Bh
S
2 10
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
X
X
X
X
MSb
“S”: sign bit, “X”: reserved
LSb
MSb
LSb
Units: V OUT × 1/2047
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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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