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参数资料
| 型号： | DS2438K |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/10页 |
| 文件大小： | 0K |
| 描述： | KIT DEMO SMART BATT MON DS2438 |
| 标准包装： | 1 |
DS2438EVKIT+
END-OF-CHARGE AND DISCONNECT TIMESTAMPS
To demonstrate the DS2438’s end-of-charge timestamp, wire the evaluation board in the charging configuration
shown in Figure 1a, start the demonstration, and then disconnect one side of the load resistor (BAT– or PACK–).
As soon as this is done, the end-of-charge Timestamp Register updates to reflect the end-of-charge time. To
demonstrate the disconnect timestamp feature, simply unplug the RJ-11 cable from the evaluation board. During
the time the cable is unplugged, the displayed values of the Elapsed Time Meter and both Timestamp Registers
become invalid because the software is not able to communicate with the DS2438. When the RJ-11 cable is
plugged back in, the software updates the displayed values to reflect the contents of the DS2438, including the new
Disconnect Timestamp Register value.
CURRENT MEASUREMENT CALIBRATION
The Calibrate Current button on the Meters Screen opens the Calibrate Current Measurement window. This
window gives a real-time demonstration of how current measurements are acquired, corrected and reported using
the DS2438. First, the DS2438 takes an uncorrected measurement of the voltage drop across the current sense
resistor. The DS2438 then adds the contents of the Offset Register to the uncorrected current measurement and
writes the corrected result to the Current Register. The host system then divides the voltage value in the Current
Register by the value of the sense resistor to obtain the measured current.
To calibrate DS2438 current measurements for offset error, follow these steps:
1. Press the Calibrate Current button in the Meters Screen.
2. Reduce the actual current driven through the sense resistor to zero.
3. Set the Offset Register value to 0 and press the Apply button.
4. Set the Offset Register value to -1 times the observed Uncorrected Current value and press the Apply button.
This uncorrected current value is the DS2438’s offset error.
5. The Current Register line should now be reporting 0 LSb, 0mV.
To calibrate DS2438 current measurements for sense resistor variation and the effects of trace resistance, follow
these steps:
6. Force a known current through the sense resistor.
7. Enter a different sense resistor value and click the Apply button.
8. Repeat step 7 until the Current reading shown by the software equals the actual current being forced.
9. Click the OK button to leave the Calibrate Current Measurement window. The DS2438 should now be correctly
calibrated, and the Current Meter on the Meters Screen should now show the actual current flowing through
the sense resistor.
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相关代理商/技术参数 |
参数描述 |
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| DS2438Z | 功能描述:IC MONITOR SMART BATTERY 8-SOIC RoHS:否 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 |
| DS2438Z/T&R | 制造商:Maxim Integrated Products 功能描述:SMART BATTERY MONITOR 8-SOIC T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC MONITOR SMART BATTERY 8-SOIC |
| DS2438Z/T&R | 功能描述:IC MONITOR SMART BATTERY 8-SOIC RoHS:否 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 |
| DS2438Z+ | 功能描述:电池管理 Smart Battery Monitor 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 |
| DS2438Z+T&R | 制造商:Maxim Integrated Products 功能描述:MONITOR MULTI-CHEM 8SOIC N - Tape and Reel 制造商:Maxim Integrated Products 功能描述:BATT MONITOR 8-SOIC T&R PBFREE 制造商:Maxim Integrated Products 功能描述:IC MONITOR SMART BATTERY 8-SOIC 制造商:Maxim Integrated Products 功能描述:Battery Management Smart Battery Monitor |
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