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参数资料
| 型号： | DS2746G+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/17页 |
| 文件大小： | 0K |
| 描述： | IC MON BATTERY 2-WIRE 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）；镍金属氢化物（NiMH） |
| 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（3x3） |
| 包装： | 带卷 (TR) |
DS2746 Low-Cost 2-Wire Battery Monitor
AUXILARY INPUT MEASUREMENTS
The DS2746 allows for measuring two auxiliary measurement inputs, AIN0 and AIN1, with respect to V SS . These
inputs are designed for measuring resistor ratios, particularly useful for measuring thermistor or pack identification
resistors. At a time of t PRE prior to the beginning of a measurement cycle on AIN0 or AIN1, the V OUT pin puts out a
reference voltage in order to drive a resistive divider formed by a known resistor value, and the unknown resistance
to be measured. Making these measurements ratiometric with respect to V OUT removes reference tolerance from
the error calculations. Each auxiliary input measurement is updated every 660ms with the average voltage over the
220ms conversion period and placed in the AIN0 and AIN1 Registers in two’s complement form. The input
impedances of AIN0 and AIN1 are sufficiently large (>15M ? ) to be connected to a wide range of voltage divider
resistances.
Figure 7. 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: 1LSB = V VOUT * 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: 1LSB = V VOUT * 1/2047
CURRENT MEASUREMENT
In the active mode of operation, the DS2746 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 , connected between the SNS and V SS
pins. The voltage sense range between SNS and V SS is ±51.2mV. Note that positive current values occur when
V SNS is less than V SS , and negative current values occur when V SNS is greater than V SS . Peak signal amplitudes up
to 102mV are allowed at the input as long as the continuous or average signal level does not exceed ±51.2mV over
the conversion period. The ADC samples the input differentially and updates the current register at the completion
of each conversion. The result is updated every 878ms with the average voltage and placed in the CURRENT
register in two’s compliment form. The current measurement register format is shown in Figure 8 and specifications
for several different sense resistor options are shown in Tables 1 and 2. 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).
Figure 8. Current Register Formats
MSB—Address 0Eh
LSB—Address 0Fh
S
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
X
X
MSb
“S”: sign bit
LSb
MSb
LSb
Units: 2 0 = 6.25 ? V/Rsns
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2746K | 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 |
| DS275 | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| DS275+ | 功能描述:RS-232接口集成电路 Line-Powered RS-232 Transceiver Chip RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| DS2751 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Multichemistry Fuel Garge |
| DS2751+ | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Multichemistry Fuel Garge |
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